Entries |
Document | Title | Date |
20080206073 | Fluid-Working Machines - A fluid-working machine comprises at least one primary working chamber such as a cylinder ( | 08-28-2008 |
20080286125 | DOUBLE-HEADED PISTON TYPE COMPRESSOR - A double-headed piston type compressor connected with an external device is provided. The compressor includes a plurality of cylinder bore pairs, double-headed pistons, a first rotary valve, a second rotary valve, first suction passages, and second suction passages. In each cylinder bore pair, a first time period from a first top dead center timing, which is timing when the double-headed piston reaches a top dead center in a first compression chamber, to a first communication start timing, which is timing when a first introduction passage starts to communicate with a first suction passage, is different from a second time period from a second top dead center timing, which is timing when the double-headed piston reaches a top dead center in a second compression chamber, to a second communication start timing, which is timing when the second introduction passage starts to communicate with a second suction passages. | 11-20-2008 |
20080298980 | COMPRESSOR - Disclosed is a compressor in which, in correspondence to a point in time that the piston is reached to a bottom dead center to start compression of the refrigerant, the outlet of the main refrigerant suction channel is closed by an inner wall of the cylinder block so that the inlet of the suction passageway of the cylinder block and the outlet of the main refrigerant suction channel of the drive shaft are discommunicated. | 12-04-2008 |
20080298981 | VARIABLE CAPACITY SWASH PLATE TYPE COMPRESSOR - Provided is a variable capacity swash plate type compressor. The variable capacity swash plate type compressor includes: a cylinder block; a front housing; a rear housing; a valve; a driving shaft; a rotor; a swash; an elastic; and a plurality of pistons, wherein at least one step portion perforating the rotor and the driving shaft, communicating the crank chamber and the refrigerant communication passage, and protruding toward its inner face so that a cross-section of the at least one step portion is reduced in a direction of the refrigerant communication passage from the crank chamber toward an inner face of the step portion, is provided, and at least one oil separation passage in which oil is centrifugally separated from a refrigerant gas flowing inside the driving shaft as the driving shaft rotates is formed. | 12-04-2008 |
20090004030 | COMPRESSOR SWASH PLATE AND METHOD OF MANUFACTURING THE SAME - The invention provides a compressor swash plate which is lead-free and is able to demonstrate a superior durability. A compressor swash plate in the invention includes a base member and a sliding layer being formed on the surface of the base member and constituting at least a sliding surface for allowing a shoe to slide thereon. The sliding layer is formed by thermal spraying Cu-based-MnS by HVOF thermal spraying method. A method of manufacturing the compressor swash plate according to the invention includes a step of thermal spraying powder formed of Cu-based-MnS onto the base member by the HVOF thermal spraying method to form the sliding layer which constitutes at least the sliding surface which allows the shoe to slide thereon on the base member. More specifically, the Cu-based-MnS is Cu-Ni-MnS. | 01-01-2009 |
20090022604 | Suction structure in piston type compressor - A suction structure is provided for allowing refrigerant from a suction pressure region in a piston type compressor. The compressor includes a rotary valve. The suction structure includes a shifting device which shifts between a connecting state and a disconnecting state. In the connecting state an outlet of a supply passage of the rotary valve is connected to a suction pressure region and in the disconnecting state the outlet of the supply passage is disconnected from the suction pressure region. The shifting device includes a valve body, a return spring, and a permanent magnet. The valve body is movable between a connecting position and a disconnecting position. The return spring urges the valve body from the connecting position toward the disconnecting position. The permanent magnet attracts the valve body by magnetic force from the connecting position toward the disconnecting position. | 01-22-2009 |
20090028722 | COMPRESSOR - Provided is a compressor having an enhanced capability of supplying oil to a thrust bearing and a radial bearing which are interposed between a center through-hole in a cylinder block and a driving shaft. To this end, the compressor | 01-29-2009 |
20090035155 | Axial piston motor - An axial piston motor, particularly an air-conditioning compressor for motor vehicles, including at least one piston with an essentially cylindrical piston skirt and with a wrap-around element, which wraps around a swivel ring or a swash plate and a piston slipper that slides on this swivel ring or this swash plate. | 02-05-2009 |
20090041591 | FLUID POWERED MOTOR OR PUMP - A low pressure fluid powered motor or pump comprises a non-rotatable cover (k); an undulating lobe cam track (e) attached to the cover (k) and defining multiple crests and troughs; a rotatable cylinder block (c); at least three reciprocable pistons (d) each housed within a bore of the cylinder block (c) and each providing at one end a crown (d | 02-12-2009 |
20090047145 | VARIABLE CAPACITY COMPRESSOR - The first maximum inclination angle θ | 02-19-2009 |
20090060757 | SWASH RING COMPRESSOR - A variable displacement compressor is disclosed. The compressor includes a crankcase for receiving a fluid. The crankcase has a plurality of compression chambers in which the fluid is compressed. A plurality of pistons disposed within the crankcase and are configured for reciprocal movement within the plurality of chambers to compress and pump the fluid. Further, a rotor assembly having a drive shaft and a rotor, wherein the rotor has a first pivot arm support member extending from a first surface of the rotor. A sleeve is slidably engaged with the drive shaft and configured for axial movement along a longitudinal axis of the drive shaft. A swash ring is coupled to the plurality of pistons and to the rotor by means of a pivot arm. Rotary motion of the swash ring and rotor causes reciprocal motion of the plurality of pistons within the plurality of chambers. | 03-05-2009 |
20090068027 | Reciprocating Fluid Machine - A reciprocating fluid machine includes a cylinder block ( | 03-12-2009 |
20090097990 | Swash plate type compressor - A swash plate type compressor has a cylinder block, a drive shaft, a piston, a pair of first and second shoes and a swash plate. The swash plate has a first surface on the far side of the swash plate from the cylinder bore in slide contact with the first shoe and a second surface on the same side of the swash plate as the cylinder bore in slide contact with the second shoe. The swash plate has first and second edges formed between the first and second surfaces and an outer peripheral surface of the swash plate, respectively. The swash plate has a curved surface formed on the first edge at and adjacent to the bottom dead center of the swash plate whose radius of curvature is larger than that of the surface of the second edge. | 04-16-2009 |
20090110568 | Axial Piston Compressor - Axial piston compressor, especially for motor vehicle air-conditioning systems, having a tilt plate ( | 04-30-2009 |
20090110569 | Variable Capacity Swash Plate Type Compressor - The present invention relates to a variable capacity swash plate type compressor, which has an elastic member mounted on a driving shaft located between a rotor and a swash plate for pushing a swash plate in a direction that an inclination angle is decreased to always contact and support a side of the swash plate to the rotor when the inclination angle of the swash plate is varied, thereby preventing a vibration of the swash plate and reducing noise during operation. | 04-30-2009 |
20090116974 | Compressor - The present invention relates to a compressor, which can inhale refrigerant supplied to a swash plate chamber to cylinder bores through the inside of a driving shaft so that a flow channel structure is simplified, thereby enhancing a suction volumetric efficiency by reducing a loss due to flow channel resistance and elastic resistance, and enhancing a compression efficiency by uniformly distributing refrigerant to the cylinder bores located at both sides of the swash plate chamber. | 05-07-2009 |
20090129948 | SUCTION STRUCTURE IN FIXED DISPLACEMENT PISTON TYPE COMPRESSOR - A suction structure is provided for allowing refrigerant into a suction pressure region in a fixed displacement piston type compressor. The compressor includes a rotary valve. The suction structure includes a shifting device which shifts between a connecting state and a disconnecting state. The shifting device includes a valve body, a return spring, a first and a second displacement chambers, and a throttle passage. The return spring urges the valve body from a connecting position toward a disconnecting position. The volume of the first displacement chamber is displacable in accordance with an amount of a fluid inside therein. The volume of the second displacement is displaced. The fluid is filled in the first and the second displacement chambers. The throttle passage connects the first displacement chamber to the second displacement chamber. The fluid flows through the throttle passage when the volume of the first displacement chamber is displaced. | 05-21-2009 |
20090129949 | AXIAL PISTON MACHINE WITH HYDROSTATIC SUPPORT OF THE HOLDING -DOWN DEVICE - An axial piston machine comprises a housing ( | 05-21-2009 |
20090136364 | Compressor - The present invention relates to a compressor, which includes a main refrigerant supply channel for supplying refrigerant by passing through the inside of a driving shaft and an auxiliary refrigerant supply channel for supplying refrigerant by passing through a suction chamber of front and rear housings and a slot of the driving shaft after passing through cylinder blocks in order to supply the refrigerant inhaled into a swash plate chamber to cylinder bores, thereby enhancing performance and lubricating ability of a driving shaft seal area since the refrigerant of the swash plate chamber can be used effectively. | 05-28-2009 |
20090148312 | Variable Capacity Swash Plate Type Compressor - The present invention relates to a variable capacity swash plate type compressor, which has a stopper protruding from the inner surface of a hub and being in contact with a sleeve when a swash plate is at the maximum inclination angle to shorten a stroke distance of the stopper for supporting the maximum inclination angle of the swash plate, thereby reducing a hitting noise when the stopper is moved at the maximum inclination angle and when an air conditioner is turned off. | 06-11-2009 |
20090148313 | VARIABLE CAPACITY COMPRESSOR - A variable capacity compressor includes: cylinder bores; a drive shaft; a rotor fixed with the drive shaft; a link for linking the rotor and a journal; a tilting plate capable of changing its tilted angle; and pistons capable of reciprocating within the cylinder bores along with a rotation of the tilting plate. Each reciprocating stroke of the pistons is adjusted according to the tilted angle of the tilting plate. The link is linked with the rotor via a first pivot and linked with the journal via a second pivot. An arrangement of the first and second pivot is set so that each head clearance of the pistons decreases as a discharge capacity decreases toward its minimum value within a small discharge capacity range. According to the compressor, it can be prevented that the discharge flaw amount is cut off abruptly and the tilted angle can be sustained stably. | 06-11-2009 |
20090196768 | FLOATING CUP PUMP ASSEMBLY - A pump assembly with a rotor adapted to rotate around a first axis and supporting outwardly projecting piston elements includes at least one drum plate adapted to rotate around a second axis in angled relation to the first axis. The drum plate supports outwardly projecting cup elements such that the cup elements mateably engage distal portions of corresponding piston elements. A curved surface support element is mounted in sliding relation along a rotatable shaft structure and operatively engages the drum plate. A biasing element urges the curved surface support element and drum plate away from the rotor. | 08-06-2009 |
20090238697 | Double-Headed Piston Type Compressor - A mechanism for drawing in refrigerant to front compression chambers ( | 09-24-2009 |
20090238698 | Reciprocal Compressor - An object of the present invention is to provide a reciprocal compressor wherein a cylinder block is provided with a void space communicating with a discharge chamber to increase the volume of the discharge chamber and which can resolve the problem of a conventional reciprocal compressor. | 09-24-2009 |
20090257890 | OIL SEPARATING STRUCTURE OF VARIABLE DISPLACEMENT COMPRESSOR - Provided is an oil separating structure of a variable displacement compressor including: a cylinder block having a plurality of cylinder bores; a front housing disposed in the front of the cylinder block to form a swash plate chamber; a drive shaft rotatably supported at the cylinder block; a lug plate disposed in the swash plate chamber of the front housing and fixedly installed at the drive shaft; a rear housing disposed in the rear of the cylinder block and having a discharge chamber and a suction chamber communicating with the cylinder bores; a swash plate installed to be rotated by the lug plate to vary its inclination angle; pistons connected to the swash plate and reciprocating in the cylinder bores; a suction path for communicating the swash plate chamber and the discharge chamber; an additional exhaust path for communicating the swash plate chamber and the suction chamber; and a control valve installed in the middle of the suction path, characterized in that the drive shaft has a communication aperture formed therein for communicating the swash plate chamber and the suction chamber, and the lug plate has a first communication hole passing therethrough and a second communication hole formed therein for communicating the first communication hole and the communication aperture. Therefore, oil and refrigerant are smoothly separated from each other using only the communication hole formed in the lug plate without an additional oil separator, thereby simplifying an inner constitution of a compressor. | 10-15-2009 |
20090290996 | Bent Axis Type Variable Displacement Pump/Motor - The present invention relates to an improvement of an bent axis type variable displacement pump/motor in which a piston moves reciprocatingly inside a cylinder and a state in which three parties of a cylinder block, a valve plate member, and a case are always in close contact with each other is secured by configuring the valve plate member with a plurality of valve plate parts comprising a first valve plate part and a second valve plate part and placing the valve plate member between a block side sliding surface of a cylinder block and a concave guide surface of the case while the plurality of valve plate parts are slidably brought into close contact with each other via sliding contact surfaces. | 11-26-2009 |
20090290997 | Reduced flow pulsations in a tandem floating cup pump with an odd number of pistons - A method for reducing the flow pulsations in a tandem floating cup pump having an odd number of pistons includes determining a low noise net index angle that produces reduced flow pulsations relative to those produced when the net index angle is either zero or half the separation angle and offsetting a first rotating group relative to a second rotating group by the low noise net index angle. The net index angle is the sum of a piston index angle and the port plate index angle. The piston index angle is the angle between a piston from a first rotating group and an adjacent piston from a second rotating group whereas the port plate index angle is the angle by which a first port plate is offset relative to a second port plate. | 11-26-2009 |
20090297369 | DOUBLE-HEADED PISTON TYPE COMPRESSOR - A double-headed piston type compressor includes front and rear housings, a cylinder block defining therein a crank chamber and a plurality of cylinder bores and having a shaft hole therethrough, a double-headed piston accommodated in the cylinder bores for reciprocating therein, a rotary shaft rotatably supported by the shaft hole, compression chambers defined by the cylinder bores, a suction chamber defined by the front housing and an introduction passage having a rotary valve for introducing refrigerant from the suction chamber into the compression chambers. The introduction passage includes a communication passage formed in the cylinder block for connecting the suction chamber to the shaft hole, suction passages connecting the shaft hole and the compression chambers and a recessed passage formed in the outer circumferential surface of the rotary shaft for connecting intermittently between the communication passage and the respective suction passages in accordance with the rotation of the rotary shaft. | 12-03-2009 |
20090304529 | Attachment structure of swash plate support and hydraulic apparatus - To provide an attachment structure of a swash plate support, that is, an attachment structure which suppresses an unstably fixed state of the swash plate support and realizes easy attachment and detachment of the swash plate support to and from a casing. A casing of a piston pump and a swash plate support which is attachable to the casing include a displacement preventing device and a rotation preventing device. In the swash plate support and the casing, since an engaging pawl portion of the displacement preventing device engages with an engaging portion, relative displacements in a first direction and a second direction along the rotational axis are prevented, and since a pin member of the rotation preventing device fits in the pin fit hole, relative rotations around the rotational axis are prevented. | 12-10-2009 |
20090304530 | Device For Coupling a Piston to an Annular Disk - A device for coupling a piston to an annular disc, in particular to a captive C-washer/swash plate or to a pivot ring of the working unit of a reciprocating-piston machine, preferably of a compressor of the air-conditioning system of a motor vehicle, having a piston bridge which is assigned to the piston and sliding shoes which are assigned to the annular disc, wherein the piston bridge engages at least partially around or over the annular disc and is in sliding engagement with the annular disc by means of the sliding shoes, is characterized in that the piston bridge is of two-layer design at least on the side facing towards the piston. The invention also relates to a reciprocating-piston machine having a device according to the invention. | 12-10-2009 |
20100003144 | Pump Apparatus - A pump apparatus which is expected to realize satisfactory work efficiency of an assembly operation, reduction of noise and suppression of rust comprises: two pump units ( | 01-07-2010 |
20100003145 | COMPRESSOR - A compressor ( | 01-07-2010 |
20100003146 | PISTON TYPE COMPRESSOR - A piston type compressor has a cylinder block, a cylinder bore formed in the cylinder block, a rotary shaft, a piston and a compression chamber formed in the cylinder bore. The piston is received in the cylinder bore and reciprocates in accordance with the rotation of the rotary shaft. The compressor further has a main suction chamber communicable with the compression chamber, a discharge chamber formed annularly so as to surround the main suction chamber, a subsidiary suction chamber formed so as to surround the discharge chamber, partitions formed in the discharge chamber so as to protrude into the discharge chamber and a suction passage formed in each partition so as to interconnect the subsidiary suction chamber and the main suction chamber. | 01-07-2010 |
20100021318 | COMPRESSOR - A rotary valve ( | 01-28-2010 |
20100034672 | Piston Compressor - The present invention provides a piston-type compressor that effectively reduces the quantity of oil flowing out of the compressor by assuring a full centrifugal separation effect to be induced as a shaft rotates without having to install a complicated oil separation mechanism. In a piston-type compressor in which a working fluid having been taken in through an intake port | 02-11-2010 |
20100068075 | Variable Displacement Swash Plate Compressor - A variable displacement swash plate compressor includes a swash-plate boss ( | 03-18-2010 |
20100068076 | HYDRAULIC PISTON MACHINE - The invention relates to a hydraulic piston engine comprising a plurality of pistons which are driven by a drive/output shaft, are axially movably guided in a piston drum of a housing, and each define a working region into which a pressurised means can be supplied via a suction valve, and from which the pressurised means can be discharged via a delivery valve. The housing comprises at least one other housing part connected to the piston drum on the front side. According to the invention, the delivery valves and the suction valves are arranged approximately parallel to the longitudinal axis of the piston engine in the region of a separating plane between the housing parts, in the housing receiving areas. | 03-18-2010 |
20100074765 | Reciprocating Compressor, in Particular CO2 Compressor for Vehicle Air-Conditioning Units - Reciprocating compressor ( | 03-25-2010 |
20100074766 | Compressor of Vehicle's Cooling System - A compressor of the vehicle's cooling system is configured such that an external refrigerant is introduced into a shaft in a radial direction through a body, flows in the shaft in an axial direction, and then is discharged to a refrigerant compression space in the body, thereby shortening the flow path of the refrigerant and minimizing flow path resistance. Moreover, since no suction valves and suction chambers are required, the structure is simplified and the cost is reduced. | 03-25-2010 |
20100092312 | WABBLE PLATE TYPE VARIABLE DISPLACEMENT COMPRESSOR - A wabble plate type variable displacement compressor comprises a rotation preventing mechanism of the wabble plate which includes (a) an inner ring provided movably in the axial direction although rotation is prevented, supporting a main shaft at the inner diameter portion to rotate relatively and to move relatively in the axial direction and having a plurality of guide grooves for guiding a plurality of balls provided for power transmission, (b) a sleeve functioning as a wabble central member of wabble movement of the wabble plate, provided on the main shaft to rotate relatively thereto and to move in the axial direction and engaging with the inner ring movably in the axial direction, (c) an outer ring having a plurality of guide grooves for guiding balls at positions opposing respective guide grooves in the inner ring, supported on the sleeve wabblingly, supporting the wabble plate fixedly on the outer circumference and supporting a swash plate rotatably via a bearing, and (d) a plurality of balls held by the guide grooves formed in the inner ring and the outer ring and being compressed between the guide grooves to transmit power. While play in a uniform motion joint provided as the wabble plate rotation preventing mechanism in the radial direction and the rotational direction is suppressed, uniform and continuous contact of the plurality of balls operating for power transmission can be realized, and a compact, easy-to-machine and inexpensive wabble plate type variable displacement compressor exhibiting good durability and silent performance can be provided. | 04-15-2010 |
20100129233 | SWASH PLATE TYPE COMPRESSOR - The present invention relates to a compressor, wherein a rotary shaft | 05-27-2010 |
20100135828 | 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 front housing disposed in the front of the cylinder block to form a swash plate chamber, a drive shaft rotatably supported by the cylinder block, a lug plate disposed in the swash plate chamber of the front housing and fixed to the drive shaft, a rear housing disposed in the rear of the cylinder block to form a suction chamber and a discharge chamber in communication with the cylinder bores through suction/discharge valves, a swash plate rotated by the lug plate to vary its inclination angle, a spring supported between the lug plate and the swash plate, and pistons slidably engaged with the swash plate and reciprocally accommodated in the cylinder bores, characterized in that a power transmission groove is formed at a rear part of the lug plate opposite to the swash plate, a hooking projection inserted into the power transmission groove is formed at a front part of the swash plate opposite to the lug plate, and slide blocks are installed at a pin projecting from both sides of the hooking projection to be interposed between an inner side surface of the power transmission groove and an outer side surface of the hooking projection. | 06-03-2010 |
20100178177 | Hydraulic rotary machine - In a hydraulic rotary machine having rotational shaft provided within a casing a rotational shaft, a cylinder block rotationally interlocked with the rotational shaft and formed with a plural number of cylinder bores, and pistons slidably received in the cylinder bores and adapted to slide back and forth within the cylinder bores while the rotational shaft and the cylinder block are put in rotation in synchronism with each other, a multitude of minute pits are formed at least either on sliding surfaces on the side of the cylinder bores, each one of the minute pits are in an elliptical shape defining a moderately sloped surface in one side and an acutely sloped surface in the other side, and the moderately sloped surfaces of the minute pits are oriented to face a direction in which said pistons are put in sliding movement in said cylinder bores under a greater load than in the other direction. | 07-15-2010 |
20100178178 | PISTON COMPRESSOR - A compressor includes a rotary shaft, a cam, a cylinder block, pistons, a thrust bearing, a rotary valve, and an oil passage. The rotary shaft has an in-shaft passage formed therein. The cam rotates integrally with the rotary shaft. The pistons are coupled to the rotary shaft through the cam. The thrust bearing is provided between the cam and the cylinder block. The thrust bearing includes a first race in contact with the cam, a second race in contact with the cylinder block, and rolling elements retained between the first and second races to form a gap therebetween. The oil passage extends from the gap to the in-shaft passage and includes an oil retaining space formed in at least one of the cam and the cylinder block. | 07-15-2010 |
20100189576 | PISTON COMPRESSOR - A compressor includes a rotary shaft, a cam, a cylinder block, pistons, a thrust bearing, a rotary valve, and an oil passage. The rotary shaft has an in-shaft passage formed therein. The in-shaft passage has an outlet open to the outer peripheral surface of the rotary shaft. The cam rotates integrally with the rotary shaft. The pistons are coupled to the rotary shaft through the cam. The thrust bearing is provided between the cam and the cylinder block. The thrust bearing includes a first race in contact with the cam, a second race in contact with the cylinder block, and rolling elements retained between the first and second races to form a gap therebetween. The oil passage is formed in the outer peripheral surface of the rotary shaft so as to extend from the gap to the outlet of the in-shaft passage. | 07-29-2010 |
20100202901 | SELF LUBRICATING PUMP - A self-lubricating water-cooled piston-style water pump has a unitary pump housing with a crankcase in direct water communication with the water pump inlet. A low pressure chamber is in direct water communication with the crankcase. A compression chamber is in direct pressurized water communication with a high pressure water manifold through a one-way valve. A high pressure water pump outlet extends outwardly from the manifold to the exterior of the housing. A crankshaft is connected to a connecting rod and a plunger rod, both of which are lubricated and water-cooled in the crankcase. A compression plunger has water channels therethrough connected to the plunger rod and in water communication with the low pressure chamber. The plunger is reciprocal within the compression chamber. A second one-way valve is on the plunger in the compression chamber to let water into the compression chamber. | 08-12-2010 |
20100209262 | PISTON COMPRESSOR - A piston compressor includes first and second cylinder blocks having an inlet port and a swash plate chamber, a drive shaft having first and second guide holes, and a swash plate having first and second supply ports. The swash plate chamber communicates with the inlet port and also with the first and second guide holes via the first and second supply ports, respectively. A distance from the inlet port to the first supply port when the first supply port is moved closest to the inlet port is greater than a distance from the inlet port to the second supply port when the second supply port is moved closest to the inlet port, and the smallest flow passage area in the first supply port and the first guide hole is greater than the smallest flow passage area in the second supply port and the second guide hole. | 08-19-2010 |
20100247338 | HIGH PRESSURE VARIABLE DISPLACEMENT PISTON PUMP - A variable flow pump includes: a housing with inlet and outlet chambers interconnected by a main bore and a non-rotating cylinder block positioned in the main bore. The cylinder block includes: a central bore communicating with the inlet chamber; cylinder bores arrayed around the central bore; first feed passages interconnecting the inlet chamber and the cylinder bores, defining a bypass flowpath between the cylinder bores; and at least one discharge valve disposed at the second end which permits fluid flow from the cylinder bores to the discharge chamber but prevents opposite flow; Pistons are disposed in the bores. A shaft is coupled to the pistons so as to cause them to reciprocate through an axial pump stroke when the shaft is rotated. A mechanism is coupled to the cylinder block which modulates the axial position of the cylinder block within the housing, varying the size of the bypass flowpath. | 09-30-2010 |
20100272583 | VALVE PLATE OF RECIPROCATING COMPRESSOR - Provided is a valve plate of a reciprocating compressor, the reciprocating compressor including a front housing and a rear housing, a cylinder block having a plurality of cylinder bores, a drive shaft rotatably supported by the front housing and the cylinder block, a swash plate connected to the drive shaft to be rotated therewith to vary its inclination angle, pistons reciprocally accommodated in the cylinder bores depending on slide movement of the swash plate, a valve plate installed between one end of the cylinder block and the rear housing and having a suction port and a discharge port, and a suction chamber and a discharge chamber that are formed in the rear housing with the valve plate interposed therebetween, characterized in that an oil suction passage, an oil discharge passage and a coolant supply passage are formed in a surface of the valve plate opposite to the pistons, the oil discharge passage is constituted by at least two branch passages directed from a center part toward an outer periphery of the valve plate, and the branch passages are connected by a connecting passage at the center part. Therefore, it is possible to appropriately distribute the pressure of oil to prevent oil leakage to the coolant supply passage, etc., even when the pressure of the oil discharged through the oil discharge passage is high. Further, the branch passages and the connecting passage have a specific shape to enable smooth flow of the oil. | 10-28-2010 |
20100329897 | METHOD FOR PROCESSING THE VALVE PLATE OF A RECIPROCATING COMPRESSOR TO PREVENT THE SUCTION VALVES AND/OR THE DISCHARGE VALVE OF THE COMPRESSOR FROM STICKING ON THE VALVE PLATE AT THE PORTIONS ABUTTING THE VALVE PLATE, AND RECIPROCATING COMPRESSOR - [Object of the Invention] An object of the present invention is to provide a method for processing the valve plate of a reciprocating compressor to prevent the suction valves and/or the discharge valves of the compressor from sticking on the valve plate at the portions abutting the valve plate, the productivity thereof being higher than that of the conventional method. | 12-30-2010 |
20110020147 | SWASH PLATE TYPE COMPRESSOR - In a swash plate type compressor, provided is an introduction flow passage through which refrigerant is introduced from a suction chamber. Further, a differential pressure control valve is provided on the introduction flow passage. The differential pressure control valve acts due to a differential pressure (Pc−Ps) between a crank pressure Pc and a suction pressure Ps. An opening of the introduction flow passage is adjusted by the differential pressure control valve so as to prevent the crank pressure Pc from exceeding a predetermined value. According to the swash plate type compressor, an excessive elevation of the crank pressure Pc can be prevented without a usage of a check valve. | 01-27-2011 |
20110027106 | RECIPROCATING PUMP - A reciprocating pump is provided that does not leak working liquid to the exterior. A communicating tube | 02-03-2011 |
20110135507 | HYDRAULIC PISTON MACHINE, IN PARTICULAR WATER HYDRAULIC MACHINE - The invention concerns a hydraulic piston machine, in particular a water hydraulic machine, with at least one cylinder, in which a piston ( | 06-09-2011 |
20110158829 | SWASH PLATE TYPE COMPRESSOR - A swash plate type compressor | 06-30-2011 |
20110164994 | Axial piston compressor, in particular a compressor for the air conditioning system of a motor vehicle - 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 | 07-07-2011 |
20120027626 | RETURN TO NEUTRAL MECHANISM FOR HYDRAULIC PUMP - A hydraulic pump includes a housing ( | 02-02-2012 |
20120045347 | Air Compressor - Disclosed is a portable air compressor accessory connectable to the chuck-end of a hand held electric drill via a shaft mount capable of rotating in the same axis of rotation as the chuck. The shaft passes through a housing via bearing mounts. Within the housing is a plurality of radially oriented piston-containing cylinders connected at their respective check valve governed air discharge outlets to a manifold. The manifold discharges to a suitable outlet connection to provide compressed air. Each cylinder has a check valve governed air inlet. Within the housing, the shaft attaches to a cam having a spindle, offset from the axis of rotation, swivel connected to a hub. Piston rods are connected at one end to hub and at the other end swivel connected to the respective pistons. One rod is fixedly connected to the hub, the other rods are swivel connected to the hub as articulating rods. | 02-23-2012 |
20120201697 | OIL MANAGEMENT SYSTEM FOR A COMPRESSOR - A compressor including a hollow housing having a suction chamber, a discharge chamber, and a crank chamber formed therein. A first fluid flow path provided within the compressor facilitates a flow of the working fluid from the crank chamber to the suction chamber. A second fluid flow path provided within the compressor facilitates a flow of a mixture of the working fluid and a lubricating fluid from the crank chamber to the suction chamber, wherein the second fluid flow path is selectively opened and closed by an annular sleeve. | 08-09-2012 |
20120237369 | CYLINDER BLOCK OF PISTON-TYPE COMPRESSOR AND METHOD FOR MANUFACTURING THE SAME - A cylinder block of a piston-type compressor includes a main cylinder block, a shaft hole formed through the main cylinder block, a plurality of cylinder bores formed in the main cylinder block around the shaft hole, a separation wall formed integrally with the main cylinder block and closing one end of the cylinder bore, a first hole formed through the separation wall and a second hole formed linearly and connecting the cylinder bore and the shaft hole. The first hole is formed so that the first hole is located on an extended line of axis Q of the second hole and the diameter of the first hole is equal to or more than that of the second hole. | 09-20-2012 |
20120237370 | ENGINE HAVING ROTARY PISTONS - The present invention relates to a mechanism ( | 09-20-2012 |
20120251344 | DOUBLE-HEADED PISTON TYPE SWASH PLATE COMPRESSOR - A double-headed piston type swash plate compressor is provided with a front housing including a suction chamber, a rear housing, a cylinder block, a rotation shaft, and double-headed pistons. The cylinder block includes cylinder bores, a rotation shaft accommodation bore, a communication conduit that communicates the suction chamber with the rotation shaft accommodation bore, and suction passages communicating the rotation shaft accommodation bore to front compression chambers. The rotation shaft includes a groove passage that communicates with the suction passages. Further, the rotation shaft includes an annular groove that communicates the communication conduit with the groove passage. The annular groove includes a front side surface, which is spaced toward the rear housing from an opening of the rotary shaft accommodation bore that faces the front housing. | 10-04-2012 |
20120251345 | Reciprocating-Type Compressor - The respective spaces for forming gas passages on the suction side | 10-04-2012 |
20120269656 | OPPOSING SWASH PLATE PISTON PUMP/MOTOR - A first swash plate ( | 10-25-2012 |
20130064690 | UNLOADER SYSTEM AND METHOD FOR A COMPRESSOR - An apparatus is provided and may include a compression mechanism, a valve plate having a plurality of ports, a header, and a plurality of cylinders disposed within the header. A plurality of pistons may be respectively disposed in the plurality of cylinders and may be movable between a first position separated from the valve plate and permitting flow through the plurality of ports and into the compression mechanism and a second position engaging the valve plate and restricting flow through the plurality of ports and into the compression mechanism. A chamber may be disposed within each of the cylinders and may receive a pressurized fluid in a first mode to move the piston into the second position and may vent the pressurized fluid in a second mode to move the piston into the first position. One of the chambers may include a different diameter than the other of the chambers. | 03-14-2013 |
20130084195 | SWASH PLATE COMPRESSOR - A swash plate compressor | 04-04-2013 |
20130224044 | HYDRAULIC PUMP - A rotational shaft | 08-29-2013 |
20130272903 | Refrigerant Compressor - In a cylinder head | 10-17-2013 |
20130330213 | DIAPHRAGM PUMP AND VALVE ASSEMBLY - A diaphragm pump having an improved wobble plate and cam/bearing assembly for increased pump life and improved inlet and outlet valve design for increased effective sealing area. A cam/bearing assembly includes a cam injection molded directly into an inner race of a bearing to prevent the cam from pulling away from the bearing. The wobble plate is injection molded directly onto an outer race of the bearing to prevent the wobble plate from pulling away from the cam and bearing. Inlet and outlet check valves include rounded peripheral relief zones that form a band, as opposed to a line, of effective sealing area when in the sealed position within a valve seat that eliminate or reduce sealing inconsistencies and increase sealing efficiencies. | 12-12-2013 |
20130343922 | SWASH-PLATE-TYPE COMPRESSOR - A swash-plate-type compressor of a double-headed-piston configuration, wherein: a front intake chamber is formed set apart from a swash plate chamber so as to be positioned in a narrow space between circumferentially arranged front cylinder bores; and an intake-chamber-communication path is formed in a cylinder block, the intake-chamber-communication path allowing the front intake chamber and a shaft hole to communicate. A front-bore-communication path is formed on the cylinder block, the communication path allowing each of the plurality of front cylinder bores to communicate with the shaft hole. A front rotary valve is provided on a rotating shaft in which a lead-in groove is formed. The lead-in groove allows the intake-chamber communication path and the front-bore communication path to communicate in the stated order, while the lead-in groove rotates integrally with the rotating shaft. In the compact swash-plate-type compressor any decrease in pulsation or intake efficiency is minimized. | 12-26-2013 |
20140003971 | HYDROSTATIC MACHINE, IN PARTICULAR AXIAL PISTON MACHINE | 01-02-2014 |
20140017100 | PISTON COMPRESSOR - A compressor includes a rotary shaft, a cam, a cylinder block, pistons, a thrust bearing, a rotary valve, and an oil passage. The rotary shaft has an in-shaft passage formed therein. The cam rotates integrally with the rotary shaft. The pistons are coupled to the rotary shaft through the cam. The thrust bearing is provided between the cam and the cylinder block. The thrust bearing includes a first race in contact with the cam, a second race in contact with the cylinder block, and rolling elements retained between the first and second races to form a gap therebetween. The oil passage extends from the gap to the in-shaft passage and includes an oil retaining space formed in at least one of the cam and the cylinder block. | 01-16-2014 |
20140056730 | HYDRAULIC PISTON PUMP WITH REDUCED RESTRICTION BARREL PASSAGE - The present disclosure sets forth an axial piston pump barrel. The axial piston pump barrel is provided with cylinders, antechambers, and fluid flow apertures which are uniquely shaped and dimensioned so as to increase the overall flowability and expulsion rate of a piston pump. By providing curvilinear transition zones and fluid flow apertures, the cylinders can be completely filled and pressurized even at the extremely high pressures and RPMs required by modem machines. Such machines may include front-end loaders, excavators, pipe layers, graders, and the like wherein such pumps can be used to power hydraulic cylinders moving the implements, work arms and other tools associated with such machines. | 02-27-2014 |
20140064991 | WABBLE PLATE TYPE VARIABLE DISPLACEMENT COMPRESSOR - A wabble plate type variable displacement compressor has a wabble plate rotation preventing mechanism including 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. A shape differs between the axial cross-sectional profiles of substantially concave spherical surfaces formed respectively in the inner periphery of the outer ring and 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 these surfaces. Implementation of the wabble plate rotation preventing mechanism in such a compressor can provide excellent durability and silent performance. | 03-06-2014 |
20140086760 | COMPRESSOR - A compressor is provided with a cylinder block including a cylinder bore, a housing coupled to the end of the cylinder block, and a discharge valve held between the cylinder block and the housing. An end of the cylinder block includes a partition that closes one end of the cylinder bore. The partition includes a bottom portion forming a bottom surface of the cylinder bore. The housing includes an outer wall and an inner wall. The outer wall includes two partition supports that are in contact with parts of the bottom portion. The two partition supports are arranged on opposite sides of the discharge valve and extend toward the inner wall. | 03-27-2014 |
20140127046 | DOWNHOLE HYDRAULIC PUMP - The present invention relates to a downhole hydraulic pump for providing fluid pressure during downhole operations, comprising a pump housing, a cam shaft rotatably arranged in the pump housing and having a longitudinal spin axis, the cam shaft comprising a shaft and a cam lobe arranged on the shaft, a radially arranged piston having a housing end and a cam end, a piston housing arranged in the pump housing, an inlet valve arranged in an inlet in the piston housing, an outlet valve arranged in an outlet in the piston housing, and a piston spring arranged in the pump housing for moving the piston away from the piston housing, wherein the piston housing is rotatably connected to the pump housing enabling rotation of the piston housing around a piston housing rotation axis parallel to the longitudinal spin axis of the cam shaft. | 05-08-2014 |
20140186196 | VARIABLE DISPLACEMENT HYDRAULIC MOTOR/PUMP - In a variable displacement hydraulic pump/motor, a casing includes a tapered roller bearing supporting a rotating shaft near supports, the support has a sliding protruding portion in a spherical shape at a shaft portion, and a through oil path extending from the shaft portion to the sliding protruding portion, the support being fitted, at the shaft portion, in a mounting hole in the casing and being fitted, at the sliding protruding portion, in a sliding recessed portion in the swash plate to cover an opening of the through oil path, a communicating oil path is between a space in which a tapered roller of the tapered roller bearing is disposed and the mounting hole, and a lubrication groove constantly connecting the opening of the through oil path to an outside of a sliding contact area between the sliding protruding portion and the sliding recessed portion is between the sliding protruding portion and the sliding recessed portion. | 07-03-2014 |
20140219832 | PISTON PUMP FOR A HIGH-PRESSURE CLEANING APPLIANCE - The invention relates to a piston pump for a high-pressure cleaning appliance, including a plurality of pistons that are movable back and forth and each of which enters a pump chamber and is displaceably held at a piston guiding part. The piston guiding part has a supporting wall on which a plurality of guiding elements, each of which guides a piston, are disposed. In order to be able to produce the piston pump in a more cost-effective manner, it is proposed according to the invention that the supporting wall is curved. | 08-07-2014 |
20140294616 | VARIABLE DISPLACEMENT SWASH PLATE TYPE COMPRESSOR - A variable displacement swash plate type compressor includes a rotary shaft, a tiltable swash plate, a movable body that is coupled to the swash plate and changes the inclination angle of the swash plate, a link mechanism that permits the inclination angle of the swash plate to be changed, a first support portion provided to the movable body, a second support portion provided to the swash plate, and a first coupling member that couples the first and second support potions to each other. The second support portion is pivotally supported by the first coupling member. The swash plate has top and bottom dead center associated parts for positioning each piston at top and bottom dead centers, respectively. The top and bottom dead center associated parts are arranged with the rotary shaft in between. The second support portion is arranged between the top and bottom dead center associated parts. | 10-02-2014 |
20140308139 | DOUBLE SWASH PLATE PUMP WITH ADJUSTABLE VALVE RING CONCEPT - Large size pumps have limited dynamics as compared to small pumps. The use of large size pumps is restricted by relatively low working pressure and low driving speed. A Large size pump has large bearing and frictional surfaces, so the increased working pressure reduces the service life of the pump. A large size pump comprises large pistons, so with the high driving speed, pistons may detach from the piston shoes due to its inertia. | 10-16-2014 |
20140328701 | 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 suction valve including a suction valve closing member which is sealingly positionable on a suction valve seat, and the pressure valve including a pressure valve closing member which is sealingly positionable on a pressure valve seat, the pressure valve seat and the suction valve seat being at different radial distances from a longitudinal pump axis. To increase piston pump mechanical stability without increasing material thickness, the pressure valve seat can be arranged, in relation to the longitudinal pump axis, offset from the suction valve seat in the circumferential direction of the piston pump. | 11-06-2014 |
20140328702 | AXIAL PISTON HIGH PRESSURE COMPRESSOR/PUMP - An axial machine having a wedge that drives a plurality of pistons and a retainer plate for maintaining the slipper shoes in contact with the wedge. A center positioning mechanism for the retainer plate in which the slipper shoes placed on the wedge have a portion extending through a respective hole in the retainer plate, with each of the slipper shoes engaging a point on the side of its respective hole to restrain the retainer plate from movement parallel to the planar angular surface of the wedge. Also described is an oil separation system for removing oil from the gas to be compressed such that the removed oil drains into the oil sump. An oil lubrication system has a cavity around the drive shaft to receive oil from the sump, and disburse the oil through a passageway to discharge ports in the wedge to disburse oil on the planar angular surface of the wedge. | 11-06-2014 |
20150030471 | BENT AXIS TYPE AXIAL PISTON PUMP/MOTOR - A center shaft of a bent axis type axial piston pump/motor includes an outer race, which is attached to a shaft attachment hole of a cylinder block, has a shaft portion accommodation hole at one end and has a spring accommodation hole at the other end, and an inner shaft, which includes a shaft supporting spherical head portion having a large outer shape dimension at a distal end of a shaft base portion and attached to the shaft portion accommodation hole of the outer race through the shaft base portion. | 01-29-2015 |
20150050164 | HYDRAULIC MACHINE, IN PARTICULAR HYDRAULIC PRESSURE EXCHANGER - A hydraulic machine ( | 02-19-2015 |
20150078930 | FLUID PRESSURE PUMP | 03-19-2015 |
20150093264 | PUMP - A pump comprises at least one piston slidable within an opening along a movement direction in order to vary the volume of a chamber. The pump further comprises a casing within which a driving device is housed for moving the piston, and a head within which the chamber is at least partially obtained, the chamber being partially delimited by the piston. A high pressure sealing element is located in a proximal position with respect to the chamber and a low pressure sealing element is located in a distal position with respect to the chamber to stop any quantities of liquid that the high pressure sealing element has let through. The high pressure sealing element is housed inside the head and the low pressure sealing element is housed inside the casing. | 04-02-2015 |
20150132156 | SWASH PLATE TYPE VARIABLE DISPLACEMENT COMPRESSOR - A swash plate type variable displacement compressor includes, a housing, a swash plate disposed in the housing and having therethrough an insertion hole, a rotary shaft inserted through the insertion hole of the swash plate, a plurality of pistons engaged with the swash plate, and a connecting member disposed between the rotary shaft and the swash plate and connecting the rotary shaft and the swash plate so as to change inclination angle of the swash plate relative to the rotary shaft. A pair of projections are provided in the insertion hole so as to extend toward the rotary shaft and restrict the movement of the swash plate relative to the rotary shaft. The paired projections are spaced away from each other so as not to be in contact with the rotary shaft simultaneously. | 05-14-2015 |
20150308271 | SWASH-PLATE HYDRAULIC MOTOR OR SWASH-PLATE HYDRAULIC PUMP - The present invention addresses the problem of providing a swash-plate hydraulic motor or a swash-plate hydraulic pump having a structure in which the swash plate can be stably held without mounting a shoe to the swash plate-side end of a tilt control piston. An example of the embodiment of the present invention is a swash-plate hydraulic motor ( | 10-29-2015 |
20150345483 | BENT-AXIS MACHINE - A bent-axis machine comprises a housing having a control cover and a piston drum which is rotatably mounted in the housing on a valve plate and which has axial cylinders, each of which receives a piston. An adjustment system includes a pivot cradle via which the piston drum and the valve plate can be pivoted relative to the drive axis about a maximum working range which is delimited by a minimum pivot angle and a maximum pivot angle. The minimum pivot angle of the working range is shifted out of its zero position by at least 5°, and the maximum pivot angle is extended in the same way by at least 5° in order to retain the entire working range about the region left out of the lower region. | 12-03-2015 |
20150377233 | INTEGRATED LUBRICATION PUMP - The invention relations to a hydraulic machine of the Dry-Case construction type comprising a hydraulic machine housing for receiving a hydrostatic driving mechanism for conveying hydraulic fluid with a driving shaft operational connected with the driving mechanism. The driving shaft is mounted rotatable about its longitudinal axis in the hydraulic machine housing. Neither the driving mechanism, nor the driving shaft nor its bearings splash or move in a sump of the hydraulic fluid. Lubricant can be pumped to bearings of the driving shaft and to the driving mechanism by a lubrication pump arranged on the driving shaft and being driven by driving shaft. The lubrication pump do not splash in a sump of the hydraulic fluid either and comprise a suction port which leads to a hydraulic fluid reservoir. | 12-31-2015 |
20160108901 | AXIAL PISTON PUMP - The invention relates to an axial piston pump, particularly for hydraulic systems, comprising a cylinder drum ( | 04-21-2016 |
20160252084 | VARIABLE DISPLACEMENT SWASH PLATE TYPE COMPRESSOR | 09-01-2016 |
20190145387 | MULTI-CHAMBER WOBBLE PLATE PUMP | 05-16-2019 |