| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 418024000 |
Spring or fluid biased movable member
| 53 |
| 418019000 |
Intermeshing rotary members
| 16 |
| 418030000 |
By cylinder or cylinder portion pivotal movement
| 8 |
| 418023000 |
By adjustably limiting vane or abutment movement
| 8 |
| 418022000 |
Axially or radially spaced working chambers
| 7 |
| 418029000 |
Rotating inner working or reacting member repositioned relative to cylinder
| 6 |
| 418031000 |
Cylinder or cylinder portion moved linearly and radially | 4 |
| 20100303660 | Variable Capacity Vane Pump - A variable capacity vane pump has a plurality of vanes radially extendably installed in their respective slots that are arranged in a circumferential direction in a rotor, a cam ring rockably provided on a supporting surface in a pump body and forming a plurality of pump chambers at an inner circumference side of the cam ring in cooperation with the rotor and the vanes, and a seal member provided at an outer circumference side of the cam ring and defining a first hydraulic pressure chamber located at a side where a pump discharge amount increases and a second hydraulic pressure chamber located at a side where the pump discharge amount decreases in a space outside the outer circumference of the cam ring. A center of the cam ring is offset to an inlet port side from a center of a driving shaft. | 12-02-2010 |
| 20110268596 | FLUID DEVICE WITH FLEXIBLE RING - A fluid device includes a housing defining a fluid inlet and a fluid outlet. A variable displacement assembly is in fluid communication with the fluid inlet and the fluid outlet. The variable displacement assembly includes a rotor assembly, a flexible ring, and a plurality of ring supports. The rotor assembly includes a rotor having a plurality of reciprocating members. The flexible ring is disposed about the rotor assembly. The flexible ring includes an inner surface, which is adapted for engagement with the plurality of reciprocating members, and an outer surface. The plurality of ring supports is disposed about the flexible ring. Each of the plurality of ring supports includes a support portion and a pivot portion about which the ring support selectively pivots. The support portion is adapted for engagement with the outer surface of the flexible ring. | 11-03-2011 |
| 20120093672 | DIRECT CONTROL LINEAR VARIABLE DISPLACEMENT VANE PUMP - A fluid pumping system for a power transmission device includes a variable displacement vane pump having a housing containing a rotor, a plurality of vanes coupled to the rotor and a linearly translatable slide for varying the displacement of the pump. A control system varies the displacement of the pump and provides a fluid output pressure selected from a continuously variable range of output pressures which are independent from the operating speed of the pump. The control system includes a linear actuator for moving the slide between minimum and maximum pump displacement positions. The linear actuator includes an electric stepper motor for bi-directionally translating an actuator shaft acting on the slide. | 04-19-2012 |
| 20130078127 | VANE CELL PUMP - The invention relates to a vane cell pump, having a rotor mounted in a pump housing and driven by a shaft, multiple vane plates mounted in this rotor in radially displaceable manner, and an outer ring surrounding the rotor and the vane plates, whereby this ring is disposed either directly in the pump housing or in a setting ring that can be moved in the pump housing along predetermined paths. | 03-28-2013 |
| 418017000 |
Speed controlled | 3 |
| 20090148324 | VARIABLE DISPLACEMENT VANE PUMP - The present invention provides a vane pump having variable displacement and high efficiency. The variable displacement vane pump includes a plurality of elongate, axially extending inserts disposed in the rotor. One of the inserts is disposed between every adjacent vane pair. The inserts are received within axially extending pockets in the rotor and are coupled to the rotor by springs. At lower rotational speeds, the inserts are retracted and the displacement of the pump chambers is at maximum. At higher rotational speeds, the inserts are advanced into the pump chambers, effectively reducing their displacement. Thus, the variable displacement pump compensates for the varying drive speed and achieves improved uniformity of fluid flow by providing maximum displacement at low speeds and reduced displacement at higher speeds. | 06-11-2009 |
| 20130039790 | VARIABLE DISPLACEMENT LUBRICANT PUMP - A variable displacement lubricant pump includes a first plunger which pushes a shiftable control ring into a high pumping volume direction. A pump rotor comprises radially slidable vanes which rotate in the control ring. A pressure control system comprises a first pressure control chamber wherein a first plunger is axially moveable. A first pressure conduit connects a pump outlet port with the first pressure control chamber. A first pressure control valve controls a pressure in the first pressure control chamber. A second pressure control valve between an outlet opening in a side wall of the first pressure control chamber and a low pressure source controls the outlet opening and is a centrifugal valve mechanically connected with the pump rotor which closes at a high rotational speed of the pump rotor. The outlet opening is closed by the first plunger in a low pumping volume position and opened in a high pumping volume position. | 02-14-2013 |
| 20130209302 | OIL PUMP - An oil pump includes a capacity adjustment mechanism that changes the pump capacity by moving a tubular body in a tube radial direction, with a pump chamber formed between the tubular body and an outer circumference side of a rotor, a first spring biasing the tubular body in a direction in which pump capacity increases, a control valve that converts oil pressure of the oil pump into control pressure and causes the control pressure to act on the capacity adjustment mechanism, and a second spring biasing a valve body in order to set the control pressure in the control valve. The relationship of the biasing forces of the first and second springs is set so that pump capacity is set to maximum when the engine rotational speed is less than a predetermined value, and so that pump capacity is reduced when the engine rotational speed exceeds a predetermined value. | 08-15-2013 |
| 418028000 |
By axial movement of movable member | 3 |
| 20080226482 | Compressor With Controlled Capacity - A compressor with controlled capacity mainly includes a double cylinder compressor with a reservoir, a capacity switch device, the outlet for the intake pipe of the said reservoir is divided into two branches, which are connected with the upper and lower cylinder through a capacity switch device switched between the 2way-2through and oneway-2through switch to realize the connection in series or in parallel for the double cylinder, as a result, the discharge capacity of the compressor is that of the first stage cylinder when connection in series, or the sum of the two cylinders discharge amount when connection in parallel. The capacity switch device may be a special 4way-2way reversing valve or the combination of the single way valve and the general 4way reversing valve, or the combination of the solenoid valve and the general 4way reversing valve, or the combination of three solenoid valves, or the combination of a single way valve and two solenoid valves. With the present invention it has completed the control of two discharge volume of the compressor, this may not only simplify the fabrication process and reduce the installation space for the compressor, reduce the manufacture cost, but also the control is very simple and reliable so that the market competence is raised significantly. | 09-18-2008 |
| 20130251571 | Vane Pump - A vane pump includes a plurality of vanes and a vane cam. Each of the vanes is housed in a corresponding one of multiple slits in an outer periphery of a rotor in a manner of being capable of protruding from, and retracting in, the slit. Each of the vanes has both end faces formed into curved surfaces in a plane perpendicular to a rotational axis of the rotor. The vane cam is disposed in contact with an end portion of the rotor such that an outer peripheral surface thereof contacts inner peripheral side end portions of all vanes to thereby forcedly make the vanes protrude and retract. The vane cam is movable so as to vary an amount of eccentricity relative to a drive shaft. | 09-26-2013 |
| 20160186752 | VARIABLE DISPLACEMENT VANE PUMP WITH INTEGRATED FAIL SAFE FUNCTION - A variable displacement vane pump has a pressure controlled valve moveable between first and at least second valve positions based on an output pressure of the pressurized lubricant delivered through the outlet. The pressure controlled valve provides an integrated fail safe function to the pump when an electrical valve fails. The pressure controlled valve is inactive in the first position for an output pressure below a threshold level, allowing an electrical valve (current, solenoid, pulse width modulation (PWM) valve) to selectively control pressure in the control chamber under normal operation of the pump. In fail safe regulation mode, the electrical valve function is disabled and the pressure controlled valve is active in its second position, controlling pressure in the control chamber. Channels and vents in the pump can be opened and closed based on selective movement of the valve when the outlet pressure is at or above a threshold level. | 06-30-2016 |
| Entries |
| Document | Title | Date |
|---|
| 20090053088 | Reduced Rotor Assembly Diameter Vane Pump - A vane pump with a reduced rotor diameter is provided. The reduced rotor diameter allows a reduction in the overall size of the pump which allows the pump to be used in circumstances wherein sufficient packaging volume does not exist for conventional vane pumps. Further, the reduced rotor diameter permits operation of the pump at a higher speed, in comparison to conventional vane pumps, for a given working fluid and pump rate. The rotor includes an integrally formed drive shaft and a cylindrical rotor head. Both fixed displacment and variable displacement embodiments are shown. | 02-26-2009 |
| 20090155110 | SCROLL COMPRESSOR WITH DEVICE TO LIMIT ORBIT RADIUS - A scroll compressor has a device which may be actuated to limit the orbit radius of the orbiting scroll. The device is moveable between an unactuated position at which it is spaced from a hub for the scroll compressor, and an actuated position at which it limits the orbit radius of the hub. The device may be actuated when reduced capacity is desired. | 06-18-2009 |
| 20110058972 | SCROLL COMPRESSOR CAPACITY MODULATION WITH SOLENOID MOUNTED OUTSIDE A COMPRESSOR SHELL - At least one bypass opening is formed in a base of a scroll member, and communicates with at least one compression chamber. The bypass opening communicates with a passage leading to a suction pressure chamber within a compressor shell. A valve includes an element electrically powered to move between a first position at which it blocks flow of refrigerant from the bypass port to the passage leading to the suction pressure chamber, and a second position at which it allows flow of refrigerant between the bypass port and the passage leading to the suction pressure chamber. A portion of the valve, which is electrically powered, is mounted outside of the compressor shell. | 03-10-2011 |
| 20110103988 | COMPRESSOR HAVING CAPACITY MODULATION SYSTEM - A compressor may include a housing and first and second scroll members supported within the housing, each having an end plate with a spiral wrap extending therefrom and meshingly engaged with the other to form a series of compression pockets operating at an intermediate fluid pressure between a suction pressure and a discharge pressure. A first passage in communication with one of the compression pockets extends from a first side of the first end plate to a second side of the first end plate generally opposite the first side. A modulation plate overlies the second side of the first scroll member for radial displacement between first and second positions. The modulation plate isolates the first passage from communication with a suction pressure region of the compressor when in the first position and provides communication between the first passage and the suction pressure region when in the second position. | 05-05-2011 |
| 20120213654 | ADJUSTABLE VANE CELL PUMP WITH A SLIDE COMPRISING RECESSES - An adjustable vane cell pump is provided having a rotor, which includes, but is not limited to bearing slots extending in radial direction, in which cane plates displaceable relative to the bearing slots are arranged. The vane cell pump further includes, but is not limited to an adjustable slide having a substantially cylindrical inner surface. The rotor is configured in order to driveably rotate about a rotary axis within the slide. The vane plates bear against the inner surface of the slide, and the slide further includes, but is not limited to a first and a second areal end face, as well as recesses, which outer-circumferentially extend parallel to the end faces | 08-23-2012 |
| 20130136640 | POSITIVE DISPLACEMENT COMPRESSOR - A rotary compressor | 05-30-2013 |
| 20130209301 | RADIAL PISTON MACHINE AND PISTON FOR A RADIAL PISTON MACHINE OF THIS TYPE - A radial piston machine includes a piston having a base which is provided with a roller. The roller is held secure by a bearing shell that is inserted in the piston base. | 08-15-2013 |
| 20130309114 | SLIDING VANE POSITIVE DISPLACEMENT PUMP - A sliding vane, positive displacement pump is provided which uses a fixed disc configuration wherein a rotor includes a pair of discs affixed to opposite faces of the rotor so as to rotate with the rotor/shaft. Preferably, the discs each have an outer diameter proximate the outer diameter of the rotor and define an outer disc surface which faces radially outwardly towards an opposing, inside surface of the pump head or other casing structure. A dynamic seal is provided along the outside disc diameter which eliminates the formation of slip between end surfaces. The path of fluid traveling from the high pressure pump side near the outlet to the low pressure side of pump near the inlet is controlled with a radial clearance that is defined between the OD of each disc and the ID of the stationary head. This effectively eliminates direct slip paths extending radially across axially-directed end faces | 11-21-2013 |
| 20140219846 | CAPACITY MODULATED SCROLL COMPRESSOR - A capacity modulation assembly is provided and may include a control valve and a first line extending between the control valve and a suction pressure region disposed within a compressor shell, whereby the suction pressure region is in communication with a suction inlet gas fitting extending through a shell of a compressor. The capacity modulation assembly may additionally include a second line extending between the control valve and an intermediate pressure region disposed within the compressor shell, whereby the intermediate pressure region is in communication with compression pockets defined between an orbiting scroll and a non-orbiting scroll. | 08-07-2014 |
| 20140341768 | SEALING DEVICE - A sealing device includes a relatively dimensionally stable, elongated friction and/or wear element and an elastically-deformable elongated sealing element which rests lenghtwise on the friction and/or wear element. The friction and/or wear element encompasses the sealing element at the ends of the friction and/or wear element. | 11-20-2014 |
| 20150139840 | VALVE DEVICE FOR A HYDRAULIC CIRCUIT, AND OIL PUMP CONTROL ASSEMBLY - A valve device for a hydraulic circuit includes an actuator unit and a valve unit. The actuator unit comprises a spring element and an electromagnetic circuit. The electromagnetic circuit comprises an armature, a core comprising a passage hole, a coil, and a flux-guiding device. A stop element comprising a passage opening is arranged in the passage hole so that a gap exists between the core and the armature when actuating the actuator unit. The valve unit comprises a first opening, a second opening, a third opening formed opposite the actuator unit, a first valve seat between the first and second opening, a second valve seat formed between the first and third opening, a first valve closure body connected to the armature and loaded by the spring element, and a second valve closing body loaded by hydraulic pressure and lifted from the second valve seat by the first valve closure body. | 05-21-2015 |
| 20160090983 | OIL PUMP STRUCTURE - An oil pump structure including: an oil pump having a first hydraulic control chamber and a second hydraulic control chamber; a hydraulic control valve having a valve operating oil passage, a first inflow passage, a second inflow passage, a first outflow passage, a second outflow passage and a drain flow passage; and an oil circuit, wherein the hydraulic control valve is connected to a branching flow passage of the oil circuit; a spool valve body of the hydraulic control valve has a front valve section, a rear valve section and an intermediate valve section, which are formed perpendicularly to the axial direction of a connecting shaft; an axial-direction dimension of the intermediate valve section is larger than an axial-direction dimension of the second outflow passage; the second outflow passage and the drain flow passage are both accommodated temporarily between the intermediate valve section and the front valve section due to movement of the spool valve body; and in the hydraulic control valve, a control hydraulic pressure is applied at all times to the first hydraulic control chamber, and the control hydraulic pressure is increased and decreased in the second hydraulic control chamber. | 03-31-2016 |
| 20160138592 | VARIABLE LUBRICANT VANE PUMP - A variable lubricant vane pump which provides a pressurized lubricant for an engine includes a pump housing comprising a pump chamber. The pump chamber comprises pump compartments which rotate from a charge zone to a discharge zone. The pressurized lubricant is discharged from the pump compartments into an outlet cavity. A control ring envelopes the pump chamber and shifts between high and a low pumping volume position. A pump rotor comprises radially slidable vanes which rotate in the control ring. A pressure control chamber pushes the control ring into the high pumping volume direction. A control valve connects or disconnects the pressure control chamber to a lubricant tank. A pilot chamber pushes the control ring into the low pumping volume direction. A pilot chamber channel connects the outlet cavity with the pilot chamber. A control chamber channel connects the outlet cavity with the pressure control chamber. | 05-19-2016 |
| 20160153449 | VEHICULAR HYDRAULICS SUPPLY DEVICE | 06-02-2016 |
| 20160169227 | COMPRESSOR | 06-16-2016 |
| 20160177947 | VANE PUMP | 06-23-2016 |
| 20160186751 | VARIABLE DISPLACEMENT PUMP - A variable displacement pump includes a housing having a pair of end wall surfaces; an annular outer rotor guide swingably disposed between the pair of end wall surfaces; a cylindrical outer rotor; an inner rotor provided radially inward of the outer rotor and configured to rotate integrally with a drive shaft at a location eccentric relative to the outer rotor; and a plurality of coupling plates coupling the inner rotor and the outer rotor. The outer rotor is rotatably fitted into an outer rotor supporting surface of the outer rotor guide. A space between the inner rotor and the outer rotor is partitioned into a plurality of chambers by the plurality of coupling plates. A concave portion is formed in the outer rotor supporting surface such that the concave portion exists over an entire axial range between the both end surfaces of the outer rotor guide. | 06-30-2016 |
