Class / Patent application number | Description | Number of patent applications / Date published |
417222100 | Axial cam | 79 |
20080226471 | VARIABLE DISPLACEMENT COMPRESSOR - A variable displacement compressor including a rotary shaft, a swash plate, and a rotary support is disclosed. An inclination angle of the swash plate is changed so that the displacement of the compressor is controlled. The rotary support has a first balance weight and an arm. The swash plate has a second balance weight and a support bracket. At least one of the first balance weight, the second balance weight, the arm, and the support bracket has a slope on a leading side in the rotation direction of the rotary shaft. The slope has a leading end. The slope is shaped to descend in the direction of the rotation axis toward the leading end. | 09-18-2008 |
20090104048 | Axial Piston Compressor - Axial piston compressor, especially a compressor for the air-conditioning system of a motor vehicle, having a housing and, for drawing in and compressing a coolant, a compressor unit arranged in the housing and driven by means of a drive shaft, the compressor unit comprising pistons, which move axially back and forth in a cylinder block, and a tilt plate (swash plate, wobble plate or tilt ring) which drives the pistons and rotates together with the drive shaft, wherein the tilt plate is so constructed or mounted that its tilting behaviour acts in a self-limiting manner such that at high speeds of rotation of the compressor, especially at very high speeds of rotation or at the maximum speed of rotation, the angle of maximum deflection of the tilt plate is less than the angle of maximum deflection α | 04-23-2009 |
20090116971 | VARIABLE DISPLACEMENT COMPRESSOR - A variable displacement compressor includes a housing, a rotary shaft, a swash plate, a suction pressure region, a suction throttle valve, an oil reservoir, a lubricating oil passage, a gas flow passage, a communication passage, and a throttle mechanism. The suction-pressure region includes a suction chamber and a suction passage. The suction throttle valve is arranged in the suction passage and defines an upstream suction-pressure region and a downstream suction-pressure region. The lubricating oil passage connects the oil reservoir to the upstream suction-pressure region. The gas flow passage connects the crank chamber to the suction chamber. The communication passage connects the lubricating oil passage to at least one of the downstream suction-pressure region, the gas flow passage and the crank chamber. The throttle mechanism is provided in the lubricating oil passage between the oil reservoir and a position where the communication passage connects to the lubricating oil passage. | 05-07-2009 |
20090220353 | Axial Piston Compressor - Axial piston compressor, especially a compressor for motor vehicle air-conditioning systems, having at least one piston and having a tilt plate, especially a ring-shaped tilt plate, which is variable in terms of its inclination with respect to a drive shaft and which is driven in rotation by the drive shaft and is connected to—especially in articulated connection with—at least one supporting element arranged at a spacing from the drive shaft and rotating together therewith, the piston(s) having in each case an articulated arrangement with which the tilt plate is in sliding engagement, and the supporting element being in operative engagement with a force transmission element which rotates together with the drive shaft, wherein the supporting element is in articulated connection with the force transmission element so as to be displaceable in a radial direction and/or perpendicular thereto, especially perpendicular to the drive shaft axis. | 09-03-2009 |
20090220354 | SWASH PLATE COMPRESSOR - An object of the invention is to provide a swash plate compressor capable of realizing an excellent sliding characteristic when a drive shaft is rotated at high speed, and a high refrigerating capacity when the drive shaft is rotated at low speed. | 09-03-2009 |
20090220355 | SWASH PLATE COMPRESSOR - The invention has its object to provide a swash plate compressor capable of realizing demonstration of an excellent sliding characteristic when a drive shaft is rotated at high speed, and of a high refrigerating capacity when the drive shaft is rotated at low speed. | 09-03-2009 |
20090220356 | Swash plate type variable displacement compressor - A swash plate type variable displacement compressor includes a crank chamber, a rotary shaft, a swash plate, a piston, a supply passage and first and second bleed passages. The supply passage connecting the crank chamber to a discharge pressure region is provided with a displacement control valve. The pressure in the crank chamber is varied by adjusting the opening of the displacement control valve. The first bleed passage connecting the crank chamber to the suction pressure region is provided with a valve. The second bleed passage constantly connecting the crank chamber to the suction pressure region is provided with a throttle. The valve operates to close the first bleed passage according to the magnitude of centrifugal force generated by the rotation of the rotary shaft. | 09-03-2009 |
20090269216 | VARIABLE DISPLACEMENT TYPE COMPRESSOR WITH DISPLACEMENT CONTROL MECHANISM - A variable displacement type compressor in which a discharge-pressure region, a suction-pressure region and a pressure control chamber are defined, has a tiltable swash plate and a piston reciprocated by the swash plate in the pressure control chamber. The inclination angle of the swash plate and the piston stroke are changed by adjustment of pressure in the pressure control chamber thereby to control the displacement of the compressor. The compressor further comprises a supply passage for supplying refrigerant gas from the discharge-pressure region to the pressure control chamber, a release passage for releasing the refrigerant gas from the pressure control chamber to the suction-pressure region, a first control valve for adjusting a cross-sectional area of the supply passage from the discharge-pressure region to the pressure control chamber and a second control valve for adjusting cross-sectional area of the release passage. The second control valve includes a valve body for opening and closing the release passage whose cross-sectional area is set minimum when the valve body is located at the closed position and a valve spring for urging the valve body in a direction to open the release passage. When the second control valve is closed, pressure in the supply passage downstream the first control valve acts on the valve body in a direction to close the release passage and pressure in the suction-pressure region acts on the valve body in a direction to open the release passage. | 10-29-2009 |
20100068074 | CONTROL VALVE FOR VARIABLE DISPLACEMENT COMPRESSOR - A control valve is configured such that as a position of a high pressure-side valve body positioned by a solenoid is closer to one side, a degree of opening for communication of a high pressure valve portion is more widened and a pressure on the side of a discharge flow path acting on the high pressure-side valve body is weakened. Further, the control valve is configured such that as a position of a low pressure-side valve body positioned by the solenoid is closer to the other side, a degree of opening for communication of a low pressure valve portion is more widened. When the high pressure-side valve body and the low pressure-side valve body are integrally positioned on the one side by the solenoid and the low pressure-side valve body is positioned on the other side by the solenoid, the high pressure-side valve body and the low pressure-side valve body are separated from each other. | 03-18-2010 |
20100104454 | VARIABLE DISPLACEMENT TYPE COMPRESSOR WITH DISPLACEMENT CONTROL MECHANISM - A variable displacement type compressor has a supply passage for supplying refrigerant gas to a pressure control chamber, a release passage for releasing the refrigerant gas from the pressure control chamber, a first control valve for controlling the amount of the refrigerant gas flowing through the supply passage, a check valve provided between the first control valve and the pressure control chamber and preventing the refrigerant gas from flowing from the pressure control chamber to the first control valve by closing the supply passage and a second control valve for adjusting a cross-sectional area of the release passage from minimum to maximum. The second control valve has a back pressure chamber communicating with the supply passage, a valve chamber forming a part of the release passage and communicating with a suction-pressure region, a valve hole forming a part of the release passage and communicating with the valve chamber and a spool having a valve portion located in the valve chamber. When a pressure in the back pressure chamber increases, the valve portion decreases the degree of opening of the valve hole. | 04-29-2010 |
20100150744 | AIR CONDITIONING COMPRESSOR - A stroke-adjustable air conditioning compressor, in particular for motor vehicles, including a drive mechanism for pistons that move back and forth, the pistons being driven by an adjusting plate, such as a pivoting plate, pivoting ring or swash plate at an adjustable pivoting angle. The position of the pivoting angle is influenced inter alia by compressive forces, inertial forces and elastic forces that are active in the drive mechanism. | 06-17-2010 |
20100150745 | YOKE POSITION SENSOR FOR A HYDRAULIC DEVICE - An embodiments of the invention relates to a yoke position sensor system ( | 06-17-2010 |
20100158706 | Pressure change compensation arrangement for pump actuator - An arrangement for controlling a swash plate of a pump includes an actuator having a piston adapted to be coupled to the swash plate wherein the separates an actuator internal chamber into first and second subchambers to which first and second valve assemblies are fluidly coupled, respectively. Each valve assembly includes a housing defining an inlet port, an outlet port, and a control port fluidly connected to one of the subchambers. A valve member slidably disposed within an interior chamber selectively moves between at least two positions to direct internal flow between the ports. | 06-24-2010 |
20100158707 | Fuel System - A fuel system is described that comprises a pressure raising and shut-off valve (PRSOV), and a control valve arrangement operable to control a fuel pressure applied to a part of the PRSOV urging the PRSOV towards a closed position, wherein the control valve arrangement is supplied with fuel at a pressure controlled by a variable fluid pressure potentiometer network including a variable flow restrictor which is variable in response to changes in the position occupied by the PRSOV. | 06-24-2010 |
20100202900 | HYDROSTATIC MACHINE HAVING A CONTROL DEVICE HAVING A RETURN ELEMENT FOR CONTROLLING A REGULATING VALVE - The invention relates to a hydrostatic machine having an actuating device for adjusting a displacement volume of the hydrostatic machine, wherein the actuating device has a return element ( | 08-12-2010 |
20100209261 | VARIABLE DISPLACEMENT SWASH PLATE TYPE COMPRESSOR - Provided is a variable displacement swash plate type compressor including a cylinder block having a plurality of cylinder bores, a drive shaft rotatably supported by the cylinder block, a lug plate fixedly installed at the drive shaft, a swash plate rotated by the lug plate to vary its inclination angle, and pistons reciprocally accommodated in the cylinder bores depending on rotation of the swash plate, the compressor including a projection projecting from the lug plate toward the swash plate and disposed only behind the rotational direction of the drive shaft, a slope formed on the rear part of the lug plate at one side of the projection, an arm projecting from the swash plate toward the lug plate, a first guide coupled to the arm in front of the rotational direction of the drive shaft to move along the slope in a contact manner, and a second guide coupled to the arm adjacent to the projection to move along the slope in a contact manner. | 08-19-2010 |
20100232987 | VARIABLE DISPLACEMENT INCLINED PLATE TYPE COMPRESSOR - A variable displacement inclined plate type compressor comprising a spindle, an inclined plate provided to be inclinable relative to the spindle and rotating together with the spindle, a pair of shoes arranged to hold the inclined plate therebetween, and a piston coupled with the inclined plate through the pair of shoes, wherein the quantity of stroke of the piston is determined depending on the inclination angle of the inclined plate. In the sliding surface of the inclined plate with which the planar part of the shoe comes into contact, a groove is provided such that the contact area of the shoe and the sliding surface of the inclined plate when the inclination angle of the inclined plate is minimum becomes smaller than that when the inclination angle of the inclined plate is maximum. In such a structure, power consumption can be reduced during low displacement operation without damaging reliability of the compressor. | 09-16-2010 |
20100322789 | AXIAL PISTON ENGINE HAVING A HOUSING WITH A RADIALLY WIDENED INTERIOR PORTION - The invention relates to a hydrostatic axial piston engine ( | 12-23-2010 |
20110038739 | VARIABLE STROKE COMPRESSOR DESIGN - A pump includes a piston block defining piston bores, and pistons disposed in the piston bores. A swash device defines a swash bore about a swash central axis (C | 02-17-2011 |
20110070104 | Wobble Plate Type Variable Displacement Compressor - Disclosed is a wobble plate type variable displacement compressor that uses a constant velocity universal joint mechanism, which comprises an inner ring and an outer ring, balls that are held between guide grooves of the inner ring and the outer ring to transmit power, and a sleeve, which functions as a wobble central member of the wobble plate, which is rotatable relative to a main shaft and is movable in the axial direction, and which is engaged with the inner ring movably in the axial direction. In the compressor, an inner ring rotation preventing mechanism is constructed as a contoured interlock mechanism formed between the outer circumference of the inner ring and the inner circumference of a housing, and a swash plate minimum inclination angle regulating mechanism, which regulates the minimum inclination angle of the swash plate by abutting the axial ends of the inner ring side and the housing side of the contoured interlock mechanism to each other, is provided to the contoured interlock mechanism. The accuracy of the minimum inclination angle regulation can be improved, and the abrasion resistance of the inner ring rotation preventing mechanism can be improved in the wobble plate type variable displacement compressor using this specified constant velocity universal joint mechanism. | 03-24-2011 |
20110091334 | Variable Displacement Compressor - A variable displacement compressor having a swash plate capable of being changed with inclination angle for converting the rotation of a drive shaft into the reciprocating motion of pistons comprises a plurality of urging means each having one end brought into contact with the swash plate and urging the swash plate in the direction of increasing an inclination angle of the swash plate, wherein the plurality of urging means are constructed so that the number of urgings is increased as the inclination angle of the swash plate is decreased. The freedom of adjustment of the urging force due to the urging means for increasing the inclination angle of the swash plate can be enlarged by a simple structure, and the urging force can be finely adjusted in accordance with the inclination angle of the swash plate. Consequently, the adjustment of the urging force due to the urging means for urging the swash plate in the inclination angle increasing direction can be optimized, and the swash plate can be allowed to perform a desirable operation near the minimum inclination angle. | 04-21-2011 |
20110182753 | Capacity Control Valve, Variable Capacity Compressor and Capacity Control System Therefor - Provided are a capacity control valve, a variable capacity compressor, and a capacity control system, which control a discharge capacity stably even when a cooling load is small, and reduce the risk of damaging a compressor even in a state when the quantity of a refrigerant is insufficient. The capacity control valve ( | 07-28-2011 |
20110194951 | Variable Displacement Compressor - Disclosed is a variable displacement compressor provided with a displacement control valve capable of easily adjusting an optimum level the sensitivity to a rise in the pressure in a crank chamber. The variable displacement compressor is configured in such a manner that the stroke of a piston is adjusted by changing the pressure in the crank chamber, the pressure in the crank chamber being changed by adjusting the degree of opening of the displacement control valve for opening and closing a path for communicating between a discharge chamber and the crank chamber, wherein the displacement control valve is provided with a valve chamber communicating with the discharge chamber, a valve hole, a valve element for opening and closing the valve hole, a pressure sensing chamber communicating with a suction chamber, a pressure sensing member disposed in the pressure sensing chamber, and a pressure sensing rod having one end connected to the pressure sensing member and the other end connected to the valve element and driving the valve element in response to displacement of the pressure sensing member. The pressure in the crank chamber acts on the valve element from the valve hole side in the direction of opening of the valve element, and acts on the pressure sensing rod from the valve hole side in the direction of closing of the valve element. That area (Sr) of the pressure sensing rod which receives the pressure in the crank chamber is set to be greater than that area (Sv) of the valve element which receives the pressure in the crank chamber. | 08-11-2011 |
20110229347 | WABBLE PLATE TYPE VARIABLE DISPLACEMENT COMPRESSOR - A compressor reciprocates pistons via a wabble plate wabbled while being prevented from rotating. A wabble plate rotation preventing mechanism is constructed as a mechanism comprising an inner ring axially movable relative to a main shaft, an outer ring connected to the wobble plate, a plurality of balls placed between guide grooves of the inner and outer rings and performing power transmission, and a sleeve axially movably engaged with the inner ring, provided so as to be axially movable together with the inner ring, and functioning as a central member for wabbling of the wabble plate. A difference in shape is provided between the axial cross-sectional profile of a substantially concave spherical surface formed in the inner periphery of the outer ring and the axial cross-sectional profile of a substantially convex spherical surface formed on the outer periphery of the sleeve such that the closer to the axial opposite ends of the contact portion between both the surfaces the position is, the greater the clearance between the surfaces becomes. Seizure and abrasion in sliding sections in the wabble plate rotation preventing mechanism using a specified constant velocity universal joint are suppressed, and a wabble plate type variable displacement compressor exhibiting excellent durability and silent performance can be provided. | 09-22-2011 |
20130004342 | TIMING MECHANISM FOR A SWASHPLATE BEARING - A timing mechanism is provided for a variable displacement pump that includes a swashplate and a housing. The timing mechanism may include a timing link and a bearing cage. The timing link may include first and second ends connected to a middle portion. The first end may be configured to be disposed in an opening of the swashplate, and the second end may be configured to be disposed in an opening in the housing. The bearing cage may be configured to be disposed between the swashplate and the housing. The bearing cage may define a slot in which the middle portion of the timing link is disposed. The slot may have a constant orientation relative to the bearing cage and contact the middle portion of the timing link. | 01-03-2013 |
20130115112 | VARIABLE DISPLACEMENT HYDRAULIC PUMP/MOTOR WITH HYDROSTATIC VALVE PLATE - A variable displacement hydraulic axial piston machine includes (a) a housing having an outlet opening; (b) a barrel mounted in the housing for rotation about a rotation axis; (c) a plurality of pistons movable in respective bores in the barrel; (d) a valve plate coupled to the barrel and having a fluid passage therein that ends at an outlet opening; and (e) a flow tube connecting the outlet opening in the valve plate to the outlet opening in the housing. The barrel and the valve plate are pivotally movable together about a pivot axis transverse the rotation axis for varying the displacement of the pistons in the bores. An end of the flow tube connects to the valve plate while allowing for axial movement of the flow tube relative to the valve plate in a direction parallel to the rotational axis of the barrel. | 05-09-2013 |
20130195686 | VARIABLE DISPLACEMENT SWASH PLATE TYPE COMPRESSOR - The present invention provides a variable displacement swash plate type compressor that reduces wear of cylinder bores and the amount of blow-by gas. Each piston of the compressor has a piston main body, which has a distal portion located at an end corresponding to the compression chamber. A tapering portion and an arcuate portion are formed in the distal portion. The arcuate portion is continuous with an end of the tapering portion that is closer to the compression chamber. The tapering portion and the arcuate portion each have a diameter that increases toward the skirt. The tapering portion has a tapering angle that is in a range from 0.45 degrees to 1.5 degrees. The distance between the distal end of the piston main body and a starting point of the tapering portion on an end closer to the skirt is set in a range from 1.5 mm to 5.0 mm. | 08-01-2013 |
20130195687 | HYDRAULIC DEVICE INCLUDING A FACE PLATE - The invention is related to a hydraulic device comprising a housing including pipe ports, a rotor ( | 08-01-2013 |
20130216403 | METHOD OF MAINTAINING HYDRAULIC PUMP IN A RENEWABLE ENERGY TURBINE GENERATOR - A hydraulic pump comprises ( | 08-22-2013 |
20130243617 | SWASH PLATE TYPE COMPRESSOR - A swash plate type compressor | 09-19-2013 |
20130259713 | SWASH PLATE TYPE COMPRESSOR - A swash plate type compressor includes a cylinder block having a crank chamber, a rotary shaft, a swash plate, pistons and fasteners extending through the crank chamber between any two adjacent pistons. The cylinder block further includes ribs projecting inward from inner surface of the crank chamber, extending in axial direction of the rotary shaft and being arranged so that the pistons and the fasteners are positioned alternately between any two adjacent ribs, a piston-side wall surface forming the inner surface and being positioned between any two adjacent ribs located on opposite side of the piston and a fastener-side wall surface forming the inner surface and being positioned between any two adjacent ribs located on opposite side of the fastener The piston-side wall surface is spaced further away from the rotary shaft than the fastener-side wall surface in radial direction of the rotary shaft. | 10-03-2013 |
20130343920 | VARIABLE DISPLACEMENT SWASH PLATE TYPE COMPRESSOR - Provided is a variable displacement swash plate type compressor including: a lug plate fixed to a driving shaft; and a swash plate combined to the lug plate and whose tilt angle is varied according to rotatory motion, wherein the lug plate includes a protruding portion protruding towards the swash plate, and a rotatory power projection transmitting power for rotating the swash plate is formed at a leading end of the protruding portion through the swash plate. Accordingly, a varying operation between a maximum tilt angle and a minimum tilt angle of the swash plate and a rotatory power transmitting operation for rotating the swash plate are performed at different locations, thereby simultaneously improving the varying operation and the rotatory power transmitting operation of the swash plate. | 12-26-2013 |
20140003970 | AXIAL PISTONS HYDRAULIC PUMP ABLE TO FUNCTION IN ONE OR THE OTHER ROTATING DIRECTION | 01-02-2014 |
20140072457 | FUEL METERING SYSTEM ELECTRICALLY SERVOED METERING PUMP - A fuel metering system for supplying fuel to load includes a variable displacement piston pump having an adjustable hanger that is movable to a plurality of positions. The variable displacement piston pump is configured to receive a drive torque and, upon receipt of the drive torque, to supply fuel to the plurality of loads at a flow rate dependent on the position of the adjustable hanger. A hanger actuator is coupled to receive hanger position commands and is operable, in response thereto, to move the adjustable hanger to the commanded position. | 03-13-2014 |
20140127041 | SWASH PLATE TYPE VARIABLE DISPLACEMENT COMPRESSOR - A compressor includes an actuator. The actuator is arranged in a swash plate chamber, while being rotational integrally with a drive shaft. With reference to the swash plate, the actuator is located in a region in which a first cylinder bore is located. The actuator includes a rotation body fixed to the drive shaft, a movable body, and a control pressure chamber. A link mechanism is located between the drive shaft and the swash plate. As the inclination angle of the swash plate is changed, the link mechanism moves the top dead center position of a first head by a greater amount than the top dead center position of a second head. | 05-08-2014 |
20140127042 | SWASH PLATE TYPE VARIABLE DISPLACEMENT COMPRESSOR - In a compressor, a link mechanism, which allows change of the inclination angle of the swash plate, is arranged between the drive shaft and the swash plate. An actuator is arranged in a swash plate chamber, while being rotational integrally with a drive shaft. The actuator includes a rotation body, a movable body, and a control pressure chamber. The swash plate has a fulcrum, which is coupled to the link mechanism, and a point of application, which is coupled to the movable body. The drive shaft is located between the fulcrum and the point of application. | 05-08-2014 |
20140127043 | SWASH PLATE TYPE VARIABLE DISPLACEMENT COMPRESSOR - A compressor includes an actuator. The actuator is arranged in a swash plate chamber, while being rotational integrally with a drive shaft. The actuator includes a rotation body, a movable body, and a control pressure chamber. A control mechanism is provided that changes the pressure in the control pressure chamber to move the movable body. The movable body is arranged such that, when the pressure in the control pressure chamber is raised, the movable body pulls the swash plate to increase the inclination angle of the swash plate. | 05-08-2014 |
20140127044 | SWASH PLATE TYPE VARIABLE DISPLACEMENT COMPRESSOR - In a compressor according to the present invention, an actuator is arranged in a swash plate chamber in a manner rotatable integrally with a drive shaft. The actuator includes a rotation body, a movable body, and a control pressure chamber. A control mechanism includes a bleed passage, a supply passage, and a control valve. The control mechanism is capable of changing the pressure in the control pressure chamber to move the movable body. The movable body opposes the lug arm with a swash plate arranged between the movable body and the lug arm. | 05-08-2014 |
20140127045 | SWASH PLATE TYPE VARIABLE DISPLACEMENT COMPRESSOR - In a compressor according to the present invention, an actuator is arranged in a swash plate chamber in a manner rotatable integrally with a drive shaft. The actuator includes a rotation body, a movable body, and a control pressure chamber. A control mechanism includes a bleed passage, a supply passage, and a control valve. The control mechanism is capable of changing the pressure in the control pressure chamber to move the movable body. When the pressure in the control pressure chamber exceeds the pressure in the swash plate chamber, the inclination angle of the swash plate with respect to the rotation axis of the drive shaft increases. | 05-08-2014 |
20140147298 | ADJUSTING DEVICE FOR A HYDRAULIC MACHINE, AND HYDRAULIC AXIAL PISTON MACHINE - An adjusting device for an axial piston machine includes an actuating piston that delimits an actuating space configured to be connected to a control oil source or a control oil drain via a control valve. A control piston of the control valve is loaded firstly by a control spring and secondly by a spring arrangement that is also in active engagement with the actuating piston. | 05-29-2014 |
20140294611 | VARIABLE DISPLACEMENT SWASH PLATE COMPRESSOR - A variable displacement swash plate compressor includes a housing, drive shaft, first and second radial bearings, swash plate, and actuator. The actuator includes a movable body and fixed body. The movable body includes a main portion and circumferential wall. The main portion includes an insertion hole. The housing includes an accommodation wall. A first clearance exists between the circumferential wall and fixed body. A second clearance exists between the drive shaft and wall of the insertion hole. A third clearance exists between the circumferential wall and accommodation wall. A fourth clearance exists between the drive shaft and first radial bearing. A fifth clearance exists between the drive shaft and second radial bearing. The first and second clearances differ in size. The sum of the third clearance and the smaller one of the first and second clearances is larger than the fourth and fifth clearances. | 10-02-2014 |
20140328698 | PISTON PUMP FOR A HIGH-PRESSURE CLEANING APPLIANCE - A piston pump for a high-pressure cleaning appliance is provided, including a plurality of pump chambers into each of which one piston which is movable back and forth plunges, and which are each in flow connection via a suction valve with a suction inlet and via a pressure valve with a pressure outlet, the pistons each being surrounded by a sealing ring which is supported in the radial direction by a ring wall and in the axial direction by a support ring. In order to develop the piston pump in such a way that it can be manufactured and assembled more cost-effectively, it is proposed that the piston pump includes a one-piece support shield which forms the support rings and surrounds the ring walls in the circumferential direction. | 11-06-2014 |
20140328699 | PISTON PUMP FOR A HIGH-PRESSURE CLEANING APPLIANCE - A piston pump for a high-pressure cleaning appliance is provided, including a pump block having a plurality of pump chambers, into each of which one piston plunges, and including a pump head having a suction inlet and a pressure outlet, each pump chamber in flow connection via a suction valve with the suction inlet and via a pressure valve with the pressure outlet, and including a clamping bracket engaging around the pump head. The piston pump can have a single U-shaped clamping bracket oriented symmetrically in relation to the longitudinal pump axis, and the pump head and the pump block form between them downstream of the pressure valves a pressure chamber in which a central, piston-like insert part is arranged, the insert part being surrounded by a sealing element and having a passage, and a pressure line oriented coaxially with the longitudinal pump axis being arranged downstream of the passage. | 11-06-2014 |
20140328700 | SWASH PLATE TYPE PISTON PUMP - A swash plate type piston pump includes a plurality of pistons, a cylinder block including a plurality of cylinders for housing the pistons, a swash plate for reciprocating the pistons to expand and contract volume chambers of the cylinders with the rotation of the cylinder block, a biasing mechanism for biasing the swash plate in a direction to increase a tilting angle, a first control pin for driving the swash plate in a direction to reduce the tilting angle according to a first load pressure, and a second control pin for driving the swash plate in a direction to reduce the tilting angle according to a second load pressure. The first and second control pins are connected in series. | 11-06-2014 |
20140334948 | HYDROSTATIC AXIAL PISTON MACHINE HAVING A CYLINDER BARREL WITH A WORKING PISTON WHICH IS MOUNTED OBLIQUELY WITH RESPECT TO ITS AXIAL DIRECTION AND WITH A PLANAR CONTROL PLATE - An axial piston machine of swash plate design includes cylinder bores with respective longitudinal axes that are arranged at an acute angle with the rotational axis and that approach the rotational axis radially in the direction of their control plate-side ends. For each cylinder bore, a point of action of a resulting hydrostatic relieving force, which acts on the cylinder barrel, of the hydrostatic sliding bearing is spaced apart radially with regard to the rotational axis of the cylinder barrel further than a point of intersection of the longitudinal axis of the cylinder bore with the cylinder barrel-side bearing face of the hydrostatic sliding bearing. | 11-13-2014 |
20140363316 | Remanufactured Hydraulic Device, Housing And Remanufacturing Method - Remanufacturing a variable displacement swash plate-type hydraulic device includes receiving a body of a used hydraulic device defining first and second actuator guide bores, at least one of which is out of specifications for guiding a swash plate linear actuator. The method further includes removing material forming the first and second guide bores, and interference fitting first and second sleeves into the body in place of the removed material. Additional material is removed from the first and second sleeves to form new first and second actuator guide bores, each satisfying specifications for guiding a swash plate linear actuator. | 12-11-2014 |
20150044067 | VARIABLE DISPLACEMENT SWASH PLATE TYPE COMPRESSOR - A variable displacement swash plate type compressor includes a displacement control valve. The displacement control valve includes a drive force transmitting member, a valve member having a first valve body, a pressure sensing mechanism, which adjusts the valve opening degree of the first valve body, a communication passage, which connects a back pressure chamber and an accommodating chamber to each other, and a second valve body, which selectively opens and closes the communication passage. The first valve body opens when current supply to an electromagnetic solenoid is stopped and the pressure in a suction pressure zone is less than a threshold value. The second valve body closes when current is supplied to the electromagnetic solenoid and opens when the current supply to the electromagnetic solenoid is stopped and the pressure in the suction pressure zone is greater than or equal to the threshold value. | 02-12-2015 |
20150044068 | SWASH PLATE TYPE VARIABLE DISPLACEMENT COMPRESSOR - A compressor according to the present invention has a housing including a first and second cylinder bores. The inner diameter of the first cylinder bore is smaller than that of the second cylinder bore. In suction process, refrigerant gas is directly drawn from an inlet port into a first suction chamber. The refrigerant gas is flowed from the first suction chamber into a first compression chamber. In contrast, refrigerant gas is drawn through the inlet port, a first suction passage, the first suction chamber, a first communication passage, a swash plate chamber and a second communication passage and into a second compression chamber. According to the above-described compressor, wherein the inner diameter of the first cylinder bore is smaller than the second cylinder bore, the difference of the amplitude of the intake pulsation between the first compression chamber and the second compression chamber can be suitably reduced. | 02-12-2015 |
20150064028 | STRUCTURE OF VARIABLE SWASH PLATE TYPE COMPRESSOR - A structure of a variable swash plate compressor includes: a rotatable shaft having a flow path through which a refrigerant flows; a rotor fixed and coupled to the shaft and has a rotor arm formed at one side of the rotor; a swash plate connected to the rotor arm by a hinge pin and mounted on the shaft so that an inclination angle is variable with respect to the shaft; a compressive coil spring installed on the shaft between the swash plate and the rotor; a lift slidably coupled to the shaft and connected to the swash plate; and a fixing device formed in the shaft and fixes the lift so as to maintain the inclination angle of the swash plate, thereby basically preventing an operational delay of the compressor, securing performance at the time of initially operating an air conditioning device, and improving marketability. | 03-05-2015 |
20150078923 | Hydrostatic Axial Piston Machine - The disclosure relates to a hydrostatic axial piston machine having a housing, having a drive shaft, to which a flange disc is fastened in a rotationally fixed manner, and having a swash plate, to which a rotor disc, driven by the drive shaft or the flange disc, is rotatably mounted, and having a plurality of displacement units arranged distributed between the flange disc and the rotor disc and around the axis of the drive shaft, each displacement unit comprising a cylinder sleeve and a piston which extends into the cylinder sleeve and has a ball head and a spherical joint head which extends into the cylinder sleeve, wherein during operation, the piston plunges more or less far into the cylinder sleeve. | 03-19-2015 |
20150125317 | SWASH PLATE TYPE VARIABLE DISPLACEMENT COMPRESSOR - A swash plate type variable displacement compressor according to the present invention includes a housing having a suction chamber, a discharge chamber, a swash plate chamber, and a plurality of cylinder bores, a drive shaft, a swash plate, a link mechanism, a plurality of pistons reciprocally received in the respective cylinder bores, a conversion mechanism, an actuator that changes the inclination angle of the swash plate, and a control mechanism that controls the actuator. The link mechanism disposed between the drive shaft and the swash plate allows a change in inclination angle of the swash plate with respect to a plane extending perpendicularly to the axis of rotation of the drive shaft. The conversion mechanism converts the rotation of the swash plate into reciprocal movement of the pistons in the cylinder bores with a stroke length according to the inclination angle of the swash plate. | 05-07-2015 |
20150337813 | PUMP VOLUME CONTROL APPARATUS - A pump volume control apparatus includes: a tilting piston; a pump volume switching valve configured to adjust a tilt driving pressure by a movement of a spool; a flow rate control spring configured to bias the spool in accordance with a tilt angle; a horsepower control piston configured to move in accordance with a pump discharge pressure; and a horsepower control spring configured to bias the horsepower control piston in accordance with the tilt angle. The tilt driving pressure is adjusted by means of the movement of the spool in accordance with a force acting on the spool in response to a flow rate controlling signal pressure in a flow rate controlled state, and is adjusted by means of the movement of the spool in accordance with a force acting on the horsepower control piston in response to the pump discharge pressure in a horsepower controlled state. | 11-26-2015 |
20150337814 | Adjustment Device for a Hydrostatic Piston Machine, and Hydrostatic Axial Piston Machine - An adjustment device for regulating torque of a hydrostatic piston machine includes a piston delimiting a chamber, a regulation valve, feedback and regulation springs, and a member. The valve has a displaceable slide to enable pressure medium to flow into or out of the chamber, a measurement surface acted on by pressure from the piston machine, and a bore open to the chamber, a side facing the chamber acted on by a chamber pressure in a first direction. The feedback spring exerts force on the slide in the first direction, depending on a position of the piston. The regulation spring exerts force on the slide in a second direction opposite the first direction. The member has a surface as large as the side of the bore such that the chamber pressure exerts force on the slide in the second direction. | 11-26-2015 |
20160047365 | CANTED OFF-AXIS DRIVER FOR QUIET PNEUMATIC PUMPING - Apparatus and associated methods relate to nutating a piston drive linkage oriented around a longitudinal axis in response to the rotation of a drive shaft about a drive axis of rotation, said longitudinal axis being offset and canted with respect to said drive axis of rotation. In an illustrative example, the piston drive linkage may be formed as an umbrella shape with multiple arm members extending radially from the longitudinal axis. The distal ends of each of the radial arm members may attach to a stationary piston crank. The nutating motion of the piston drive linkage may impart a substantially linear motion profile substantially parallel to the drive axis of rotation. A shaft extending along the longitudinal axis from the piston linkage may advantageously freely insert into and rotate within a receptacle of a spinner body being rotated around the drive axis of rotation. | 02-18-2016 |
20160047367 | VARIABLE DISPLACEMENT SWASH-PLATE COMPRESSOR - A variable displacement swash plate type compressor includes a rotary shaft, a swash plate, and an actuator, which changes the inclination angle of the swash plate. The actuator includes a partition body and a movable body, which moves in a direction along the rotational axis of the rotary shaft. The movable body includes a guide surface, which changes the inclination angle of the swash plate, and a sliding portion, which slides on the rotary shaft or on the partition body. When viewed from a direction that is perpendicular to the direction in which the rotational axis of the rotary shaft extends and perpendicular to a first direction, the guide surface is configured such that a perpendicular line or a normal line to the guide surface intersects with the rotational axis of the rotary shaft in a zone surrounded by the sliding portion. | 02-18-2016 |
20160084241 | ULTRA-HIGH PRESSURE GENERATOR - An ultra-high pressure generator includes: an intensifier that discharges pressurized fluid and has a double-acting drive cylinder formed to have a first chamber and a second chamber which are delimited by a piston driven by a working medium, high pressure cylinders which discharge the pressurized fluid, and plungers which reciprocate with the piston in the high pressure cylinders; a closed-circuit working medium pump having a first and second ports as suction/discharge ports for the working medium; a drive source that drives the closed-circuit working medium pump; a first working medium channel that communicates the first chamber with the first port; and a second working medium channel that communicates the second chamber with the second port, wherein the closed-circuit working medium pump sucks/discharges the working medium from/to the first and second chambers respectively via the first and second ports to drive the intensifier. | 03-24-2016 |
20160084321 | Hydraulic Pump with Integrated Clutch - A hydraulic pump with an integrated clutch includes an outer cone coupled to a drive gear or a driven gear and having a frictional inner surface, and an inner cone arranged inside the outer cone, coupled to the drive gear or the driven gear and having a frictional outer surface, wherein the inner and outer cones are rotationally and axially movable with respect to each other. A spring is coupled to the inner cone or the outer cone and acts to axially displace the inner cone with respect to the outer cone in a first direction. An actuator including a rod and a piston is coupled to the inner cone or the outer cone and acts to overcome the force of the spring to axially displace the inner cone with respect to the outer cone in a second direction being axially opposite to the first direction. | 03-24-2016 |
20160153437 | VARIABLE DISPLACEMENT SWASH-PLATE COMPRESSOR | 06-02-2016 |
417222200 | With sump pressure actuation | 21 |
20090129947 | Axial Piston Compressor - Axial piston compressor, especially for motor vehicle air-conditioning systems, having a tilt plate ( | 05-21-2009 |
20120251343 | Control Valve and Variable Capacity Swash-Plate Type Compressor Provided with same - [Object of the Invention] An object of the present invention is to provide a control valve that accommodates a pressure sensitive unit in a solenoid unit and is of simple structure. | 10-04-2012 |
20140099214 | CAPACITY CONTROL VALVE - In a capacity control valve, a discharged-fluid-receiving part having a diameter that is larger than the diameter of a valve hole interconnecting a first valve chamber and a third valve chamber is provided to the outer periphery section of a third valve part. It is thereby possible to obtain a capacity control valve in which, when the first valve part opens, the discharged-fluid-receiving part receives the pressure of the discharged fluid, the actuation response of the valve body during an opening action is moderated, an excessive increase in the sensitivity to a rise in pressure in the crank chamber caused by a rapid increase in the amount of coolant flowing into the crank chamber is prevented, and the action of the valve body is stable. | 04-10-2014 |
20140140863 | Variable Displacement Axial Piston Device - An outer circumferential surface of a trunnion shaft includes a sliding contact region that has a circular arc shape as viewed along a slanting axis line and is substantially brought into contact with an inner circumferential surface of the bearing portion in a rotatably sliding manner, and at least one suction groove that forms a pocket portion between the suction groove and the inner surface of the bearing portion. The pocket portion is opened to an inner space of housing on at least one side in an axis line direction of the trunnion shaft. | 05-22-2014 |
20140248163 | CONTROL VALVE FOR A VARIABLE CAPACITY COMPRESSOR AND METHOD FOR MANUFACTURING SAME - Provided is a control valve for a variable capacity compressor, the control valve including: a valve body including a crank-chamber port, a discharge port, a suction port, a control channel formed inside the control valve such that the crank-chamber port and the discharge port communicate with each other, and a first bleeding channel formed such that the crank-channel port and the suction port communicate with each other; an operating unit provided in the valve body and including a second bleeding channel communicated from a center area to a side surface of the operating unit; and a driving unit provided in the valve body and connected to the operating unit to enable the operating unit to reciprocally move according to a current applied by an external source. | 09-04-2014 |
20140286798 | SERVO REGULATOR - A servo regulator that causes a servo piston to move on the basis of working fluid pressure in two pressure chambers includes: a sleeve that is inserted into an insertion hole formed in a case and has a supply port capable of supplying a working fluid from a fluid pressure source to one of the pressure chambers; a spool valve disposed in the sleeve so as to be biased by a biasing member; and a solenoid that is attached to the case in order to drive the spool valve via a plunger. The sleeve includes a pressure receiving portion on which a fluid pressure of the working fluid from the fluid pressure source is exerted, and is pressed against an end surface of the solenoid by a biasing force acting on the pressure receiving portion. | 09-25-2014 |
20140294612 | VARIABLE DISPLACEMENT SWASH PLATE COMPRESSOR - A variable displacement swash plate compressor is provided with a housing, a drive shaft, a swash plate, a link mechanism, a piston, a conversion mechanism, an actuator, and a control mechanism. The housing includes a suction chamber, a discharge chamber, a swash plate chamber, and a cylinder bore. The actuator includes a movable body coupled to the swash plate, a fixed body fixed to the drive shaft, and a control pressure chamber defined by the movable body and the fixed body. The movable body includes a circumferential wall extending in a direction along a rotational axis and surrounding the fixed body, which includes a guide portion projecting in an axial direction along an inner surface of the circumferential wall. The movable body contacts the guide portion to restrict inclination of the movable body relative to the drive shaft that is greater than or equal to a predetermined amount. | 10-02-2014 |
20140294613 | VARIABLE DISPLACEMENT SWASH PLATE COMPRESSOR - A variable displacement swash plate compressor that includes a cylinder bore, a swash plate chamber, a swash plate, and a double head piston, which defines first and second compression chambers in the cylinder bore. First and second suction chambers are in communication with the first and second compression chambers, respectively. The displacement of the top dead center of the piston in the first compression chamber is greater than the displacement of the top dead center of the piston in the second compression chamber. A first suction passage extends from a suction port to the first suction chamber without passing through the second suction chamber and the swash plate chamber. A second suction passage extends from the first suction chamber to the second suction chamber. | 10-02-2014 |
20140294614 | DOUBLE-HEADED PISTON SWASH PLATE TYPE COMPRESSOR - A double-headed piston swash plate type compressor includes a rotary shaft, a drive force transmitting member, a tiltable swash plate, a movable body that changes the inclination angle of the swash plate, and a control pressure chamber defined by the movable body and the drive force transmitting member, which are arranged on one side with respect to the swash plate in the axial direction of the rotary shaft. The movable body includes a bottom portion, through which the rotary shaft extends, and a cylindrical portion, which extends from the bottom portion in the axial direction of the rotary shaft to surround the rotary shaft. The cylindrical portion is permitted to move in the axial direction while sliding along a part of the drive force transmitting member, so that the inclination angle of the swash plate is changed in accordance with the internal pressure of the control pressure chamber. | 10-02-2014 |
20140356195 | OIL SUCTION DEVICE OF VEHICLE - An oil suction device of a vehicle has a mechanical oil pump and includes an air suction unit. The air suction unit includes a first communication passage, a second communication passage, and an opening and closing mechanism. The first communication passage communicates with an atmosphere side. The second communication passage communicates with a suction unit of the oil pump. The opening and closing mechanism is capable of switching between opening and closing of communication between the first communication passage and the second communication passage. When an oil suction pressure of the oil pump becomes a negative pressure lower than or equal to a predetermined pressure, the opening and closing mechanism is opened to cause air sucked through the air suction unit to be mixed into oil which is sucked from an oil reservoir through a suction pipe. | 12-04-2014 |
20140369862 | DOUBLE-HEADED PISTON TYPE SWASH PLATE COMPRESSOR - A double-headed piston type swash plate compressor includes a swash plate, a double-headed piston, a control pressure chamber, a discharge pressure region, a suction pressure region, a supplying passage, which extends from the discharge pressure region to the control pressure chamber, a narrowing portion, which narrows an opening degree of the supplying passage, and a displacement control valve. The displacement control valve controls a pressure in the control pressure chamber. The displacement control valve includes a driving force transmission rod, a valve chamber, a guide wall, and a back pressure chamber. The back pressure chamber is in communication with the valve chamber through a clearance between the guide wall and the driving force transmission rod. The narrowing portion has a passage cross-sectional area that is larger than a passage cross-sectional area of the clearance. | 12-18-2014 |
20140377087 | Variable Displacement Compressor - Variable displacement compressor, with center bore | 12-25-2014 |
20150023810 | DOUBLE-HEADED PISTON TYPE SWASH PLATE COMPRESSOR - A double-headed piston type swash plate compressor includes first and second cylinder blocks, a rotation shaft, a double-headed piston, a crank chamber, a drive force transmission member, a swash plate, a movable body, a control pressure chamber, and a support. The control pressure chamber is defined by the movable body in the housing. The control pressure chamber moves the movable body in the axial direction of the rotation shaft. The support is located on the swash plate and supported by the rotation shaft. The drive force transmission member and the movable body are located at a first side of the swash plate in the axial direction of the rotation shaft, and the support is located at a second side of the swash plate. The drive force transmission member, the movable body, and the support set the inclination angle of the swash plate relative to the rotation shaft. | 01-22-2015 |
20150086391 | SWASH PLATE TYPE VARIABLE DISPLACEMENT COMPRESSOR - In a swash plate type variable displacement compressor, a rear housing has a pressure regulation chamber into which a rear end of a drive shaft body, a projection of a second cylinder block, a second sliding bearing, and a rear end of a second support member project. In the compressor, when a drive shaft is rotated, heat is generated in the drive shaft body, the projection, the second sliding bearing, and the second support member to heat the refrigerant gas in the pressure regulation chamber. Accordingly, in the compressor, temperature of the refrigerant gas in the pressure regulation chamber is hard to drop. Therefore, the pressure of the refrigerant gas flowing from the pressure regulation chamber to the pressure control chamber is varied quickly and a movable body is preferably moved with the pressure in the pressure control chamber. | 03-26-2015 |
20150093263 | SWASH PLATE TYPE VARIABLE DISPLACEMENT COMPRESSOR - A swash plate type variable displacement compressor includes a collection and supply mechanism. The collection and supply mechanism has collection passages, supply passages, an annular space, an inlet port, and an outlet port. The inlet port is communicable with a working collection passage of the collection passages. The outlet port is communicable with a working supply passage of the supply passages. When the inclination angle of the swash plate is maximum, residual refrigerant gas in a compression chamber of collection phase is collected through the working collection passage and the collected refrigerant gas is supplied to a compression chamber of supply phase. On the other hand, when the inclination angle is less than the maximum, residual refrigerant gas is supplied no more into the supply-phase compression chamber. | 04-02-2015 |
20150104334 | VARIABLE DISPLACEMENT SWASH PLATE COMPRESSOR - A variable displacement swash plate compressor includes a control pressure chamber and a displacement control valve that controls the pressure of the control pressure chamber. The displacement control valve includes an electromagnetic solenoid, a driving force transmission member, a valve body, and a pressure sensing mechanism. An accommodation chamber accommodates the pressure sensing. A valve chamber accommodates the valve body having a valve opening degree determined by an urging force applied to the valve body through the driving force transmission member and by an urging force applied to the valve body by the expansion and contraction of the pressure sensing mechanism. The valve body and the pressure sensing mechanism form a valve unit. When the electromagnetic solenoid is deactivated, the pressure of the accommodation chamber acts on a back surface of the pressure sensing mechanism so that a force in the open direction is applied to the valve unit. | 04-16-2015 |
20150118074 | SWASH PLATE TYPE VARIABLE DISPLACEMENT COMPRESSOR - In a swash plate type variable displacement compressor, a lug plate includes a cylinder chamber and first and second guide surfaces. Inner peripheral edges of the first and second guide surfaces are defined respectively at parts where the peripheral edge of the cylinder chamber and the guide surfaces overlap with each other. When the inclination angle of a swash plate of the compressor is maximum, first and second guided surfaces and the first and second guide surfaces, respectively are brought into line contact with each other at a first position. At this time, first and second slide contact widths are maximum. When the inclination angle of the swash plate is minimum, the first and second guided surfaces and the first and second guide surfaces, respectively are brought into line contact with each other at a second position. At this time, the first and second slide contact widths are minimum. | 04-30-2015 |
20150132153 | Variable Displacement Compressor - This variable displacement compressor comprises: a housing; a piston; a drive shaft rotatably supported by the housing; a rotor that rotates in unison with the drive shaft; a swash plate that rotates in synchronism with the rotation of the rotor connected via a connecting means; a conversion mechanism that converts the rotation of the swash plate into a reciprocating motion of the piston; and a pressure control valve that is capable of controlling the internal pressure of a crank chamber. The variable displacement compressor is characterized in that: the connecting means directly or indirectly connects a first arm projecting from the rotor and a second arm projecting from the swash plate; and the drive shaft is eccentrically inserted into a through-hole that is perforated through the swash plate. With this configuration, it is possible to provide a variable displacement compressor in which the behavior of the swash plate can be stabilized with a simple structure and in which the swash plate can be inclined smoothly. | 05-14-2015 |
20150139824 | PUMP CONTROL APPARATUS - A pump control apparatus includes an actuator that varies a discharge capacity of a pump, and a regulator that regulates a control pressure led to the actuator. The regulator includes: a driving pressure port to which an average discharge pressure is led; a source pressure port to which a high pressure side discharge pressure is led; a signal pressure port to which a signal pressure is led; and a spool that regulates the control pressure using the high pressure side discharge pressure as a source pressure by moving upon reception of the average discharge pressure and the signal pressure. A driving pressure receiving surface that receives the average discharge pressure is formed inside the spool, and a signal pressure receiving surface that receives the signal pressure is formed in an outer peripheral step portion of the spool. | 05-21-2015 |
20160186733 | CONTROL VALVE FOR VARIABLE DISPLACEMENT COMPRESSOR - A control valve includes: a body having a port communicating with a discharge chamber, a port communicating with a control chamber, and a main valve hole formed in a passage connecting the ports; a main valve element configured to close and open a valve section by moving toward and away from the main valve hole; a solenoid configured to generate a force for driving the main valve element in valve opening and closing directions of the valve section, power supply to the solenoid being controlled according to pulse width modulation (PWM); and a vibration absorbing structure including a spring connected with a plunger configured to be displaced integrally with the main valve element, and a weight connected with the plunger with the spring therebetween in a relatively displaceable manner, and configured to suppress vibration of the main valve element caused by the PWM control. | 06-30-2016 |
20180023553 | WOBBLE PLATE COMPRESSOR AND OXYGEN CONCENTRATOR USING THE SAME | 01-25-2018 |