Abstract: A multi-positional dog clutch selectively engageable with a transmission is disclosed. The dog clutch includes a shift fork, a dog clutch carrier, a common member, and first and second dog clutch sliding members. The transmission includes first and second fixed members. The first dog clutch sliding member is configured to engage with and disengage from the first fixed member. The second dog clutch sliding member is configured to engage with and disengage from the second fixed member. The dog clutch carrier is movable to (i) a first position in which the first dog clutch sliding member is engaged with the first fixed member, (ii) a second position in which the second dog clutch sliding member is engaged with the second fixed member, and (iii) a third position in which the first dog clutch sliding member is engaged with the first fixed member and the second dog clutch sliding member is engaged with the second fixed member.

Abstract: A vane pump for an automatic transmission includes a housing which may be spaced from the axis of the transmission input shaft axis and driven by a chain or gear train driven by the torque converter hub or disposed on and about the axis of the transmission input shaft and driven at engine speed. The vane pump includes a pair of port plates which reside on the end faces of a pump body having a cylindrical chamber which receives an eccentrically disposed rotor that is coupled to a stub shaft in an off-axis arrangement. The rotor includes a plurality of radial slots which receive a like plurality of vanes. The outer ends or edges of the vanes are in contact with the wall of the cylindrical chamber and the inner ends or edges are in contact with a pair of vane rings received within recesses in the ends of the rotor. The vanes are thus constrained between the wall of the chamber and the vane rings which positively determine their radial positions as they and the rotor rotate.

Abstract: Disclosed is a priming system for inkjet printheads that includes at least one inkjet printhead. Each inkjet printhead includes one or more single color inkjet chips. Further, the priming system includes at least one ink supply unit. Each ink supply unit is fluidly coupled to a corresponding single color inkjet chip for supplying ink to the corresponding single color inkjet chip. Furthermore, the priming system includes a pumping member that includes at least one pumping head. A pumping head is fluidly coupled to the corresponding single color inkjet chip to receive the ink from the corresponding single color inkjet chip, and to a corresponding ink supply unit to pump the ink back into the corresponding ink supply unit.

Abstract: A screw compressor including a driving machine having an output shaft coupled to an input shaft of a compressor main body; a clutch mechanism between the output shaft of the driving machine and the input shaft of the compressor main body; a pressure sensor installed in a discharge channel; and a controller that controls the switching of the clutch mechanism between an engaged state and a disengaged state based on a discharge pressure value detected by the pressure sensor is disclosed. When the discharge pressure value becomes higher than an unload set value that is predetermined, the controller controls the clutch mechanism to be switched to the disengaged state. According to the above screw compressor, power losses are reduced even when the supply of compressed gas is hardly required.

Abstract: A fluid machine includes: a first shaft; a compressor/expander fluid machine; a planetary gear mechanism having a sun gear connected to a second shaft rotating in synchronization with the compressor/expander fluid machine, a ring gear connected to the first shaft, a planetary gear, and a planetary carrier; a first clutch that locks/releases the planetary carrier and one of the ring gear and the sun gear; a second clutch that locks/releases the planetary carrier and the housing; a clutch control unit that controls locking/releasing of the first and second clutches depending on whether the compressor/expander fluid machine operates as an expander or a compressor.

Abstract: A positive displacement pump (8) comprises a cylindrical input shaft (13) comprising a first area (A1) with a first diameter (D1), a second area (A2) with a second diameter (D2), and a third area (A3) with a third diameter (D3), where the second diameter is greater than the first diameter and the third diameter. A stator (19) is press fit to a portion of the third area. A cylindrical bushing (15) is press fit around the second area. When the input shaft (13) rotates, the torsional vibration damping bushing (15) resists the rotation. The pump also comprises a clutch assembly (21). A clutch armature (29) of the assembly comprises a cylindrical, hollow passageway (290) and radially extending arms (39). Each arm comprises an opening (293), at least one slot (295) passing through the arm, and at least one void (297) abutting the slot, the void passing through the arm. When the clutch assembly engages, the armature damps vibrations.

Abstract: A fluid pump includes a motor, an inner gear rotor and an outer gear rotor. The inner gear rotor is driven for rotation about an axis by the motor and has a plurality of outwardly extending teeth. The outer gear rotor has a plurality of inwardly extending teeth that are engaged by the teeth of the inner gear rotor so that the outer gear rotor is driven for rotation about a second axis when the inner gear rotor rotates. At least one of the inner gear rotor and the outer gear rotor is formed from a plastic material.

Abstract: The present disclosure relates to a hydraulic drive having a stationary housing. The hydraulic drive also has a drive shaft that extends through the stationary housing. Furthermore, the hydraulic drive has a hydraulic motor for rotating the drive shaft relative to the stationary housing. Additionally, the hydraulic drive includes a driven hub adapted to be connected to a rotatable driven element. The hydraulic drive also has a coupling/decoupling arrangement that allows the hydraulic drive to be operated in an engaged mode where the drive shaft is coupled to the driven hub in a direct drive arrangement and a disengaged mode where the drive shaft is decoupled from the driven hub. When the hydraulic drive is operated in the engaged mode torque from the drive shaft is transferred to the driven hub causing the driven hub to rotate relative to the stationary housing. When the hydraulic drive is operated in the disengaged mode the driven hub can free wheel relative to the drive shaft.

Abstract: A rotary fluid pressure device includes a gerotor gear set having a ring gear and a star gear orbitally moveable about a longitudinal axis relative to the ring gear. The star gear includes an annular spacer ring disposed at one end of the star gear. A brake pin is moveable along the longitudinal axis into and out of interlocking engagement with the annular spacer ring. The brake pin includes an outer surface for engaging an interior surface of the spacer ring. The outer surface of the brake pin and the interior surface of the spacer ring are each angled relative to the longitudinal axis to engage each other in a tapered engagement, to generate an axial force along the longitudinal axis to move the brake pin out of engagement with the star gear in response to a torque being applied to the star gear.

Abstract: A power transmission device includes a rotatable shaft having an axis of rotation. A lubrication pump includes an inner rotor and an outer rotor in meshed engagement with one another. A clutch continuously drivingly couples one of the inner rotor and the outer rotor and the shaft to limit the power transferred from the shaft to the lubrication pump. The clutch includes a plurality of circumferentially spaced-apart protrusions biasedly engaged with the shaft.

Abstract: A hydraulic device includes a gerotor assembly, a wobble stick, an output shaft, a housing assembly, first and second ports, first and second brake disks, a piston, and a biasing member. The gerotor assembly includes a rotor and a stator. The housing assembly receives the gerotor assembly, the wobble stick and the output shaft. The first and second ports are in communication with the gerotor assembly. The piston is disposed in the housing assembly adjacent at least one of the brake disks. The piston cooperates with the housing assembly to define a brake pressure chamber. The housing assembly and the first and second ports are configured such that pressurization of either port results in pressurization of the brake pressure chamber. The biasing member is disposed in the housing and contacts the piston. The biasing member urges the piston toward at least one of the brake disks.

Abstract: A positive-displacement pump having an eccentrically positioned internal ring gear and pinion within a pump housing. Pressurized operating fluid is provided by the pump to actuate an actuation piston of a clutch unit, such as a double clutch unit. The clutch unit is drivingly coupled with the pump for movement between engaged and disengaged positions. At least one throughbore is provided in the pump housing within which throughbore the clutch actuation piston is guided.

Abstract: A hydraulic device includes a gerotor assembly, a wobble stick, an output shaft, a housing assembly, a first port in the housing assembly, a second port in the housing assembly, first brake disks, second brake disks, a piston, and a biasing member. The gerotor assembly includes a rotor and a stator. The wobble stick connects at a first end to the rotor. The output shaft connects to a second end of the wobble stick. The housing assembly receives the gerotor assembly, the wobble stick and the output shaft. The first port is in communication with the gerotor assembly. The second port is also in communication with the gerotor assembly. The first brake disks connect to the output shaft. The second brake disks connect to the housing assembly. The piston is disposed in the housing assembly adjacent at least one of the brake disks. The piston cooperates with the housing assembly to define a brake pressure chamber.

Abstract: A closed compressor includes a closed case in which a plurality of compression mechanism sections are accommodated, the compression mechanism section having a cylinder including a cylinder chamber eccentrically rotatably accommodating a roller, the compression mechanism section including a blade having a leading edge to divide the cylinder chamber into two parts along a direction in which the roller rotates, the compressor including a high-pressure refrigerant introducing mechanism guiding a high-pressure refrigerant into the cylinder chamber and separating the blade from the roller, the compressor being configured to switch between a high-capacity operation in which all the compression mechanism sections perform a compression operation and a low-capacity operation in which the blade in the compression mechanism section is separated from the roller and thus prevented from performing the compression operation, the high-pressure refrigerant introducing mechanism including a high-pressure refrigerant storage sec

Abstract: The invention relates to a rotary screw machine of volume type comprising a body (30) having a main axis X, two members (10, 20), wherein a first one (20) surrounds a second one (10). Said first member (20) is hinged in said body (30) and is able to swivel on itself about its axis (Xf), aligned with said main axis X, according to a swiveling motion, whereas the axis (Xm) of said second member (10), revolves about the axis of said first member (Xf) according to an revolution motion having said length E as a radius. The machine further comprises a synchronizer (34, 36, 38, 40) synchronizing said swiveling motion and said revolution motion, such that a working medium performs a volumetric displacement in at least one working chamber (11) delimited by an outer surface (22) of said first member (20) and a inner surface (12) of said second member (10).

Abstract: A compressor of the present invention having an electromagnetic clutch (14) for transmitting a driving force from a driving source (15) to a rotary shaft (4), in which the clutch (14) includes a rotor (16) rotated by receiving the driving force of the driving source (15), the rotor (16) containing an electromagnetic solenoid (22), a hub (48) fixed to the rotary shaft (4), and a clutch mechanism (24) capable of connecting the rotor (16) and the hub (48) to each other; the clutch mechanism (24) has an armature (26) attracted to the rotor (16) when the solenoid (22) is in an operating state, an inner support (31) coupled to the hub (48), and a shim (62) sandwiched between the inner support (31) and the hub (48); and the shim (62) determines the size of a gap (L) to be secured between the rotor (16) and the armature (26) when the solenoid (22) is in a resting state.

Abstract: A variable capacity rotary compressor having a slot defined between eccentric bushes, a latch pin fitted to a rotary shaft so as to be latched to the slot, and a restraint unit for restraining the eccentric bushes upon rotation of the rotary shaft. The restraint unit includes a restraint member mounted in the rotary shaft, a supporting shaft extending from the latch pin to be inserted into the hollow portion of the restraint member, and a return spring interposed between an outer circumference of the supporting shaft and the restraint member to move the restraint member inward toward the center of the rotary shaft when the rotary shaft is not rotated. The restraint unit is easy to manufacture and install and to ensure smooth operation thereof.

Abstract: A rotary fluid pressure device defining a fluid inlet (17), an output shaft (37), and a housing (41,43) defining a brake chamber (61), a piston member (63,65) being disposed therein and biased toward an engaged position by a spring (69). Braking means (57,59) is associated with the piston and the output shaft, such that movement of the piston to the engaged position results in braking of said output shaft. The housing defines a fluid pressure port (73) in communication with the fluid inlet, and the piston defines a large pressure release chamber (71) in fluid communication with said fluid pressure port. The piston defines a small pressure release chamber (89) also in fluid communication with the fluid pressure port. A valve means (75,81) is operable, when fluid pressure in the large release chamber reaches a predetermined pressure, to communicate the large to a source of low pressure fluid.

Abstract: A variable capacity rotary compressor to prevent eccentric bushes from rotating faster than a rotating shaft, and includes upper and lower compression chambers having different interior capacities thereof, and the rotating shaft with upper and lower eccentric cams being provided thereon to be eccentric from the rotating shaft in a common direction. Upper and lower eccentric bushes are fitted over the upper and lower eccentric cams, respectively, with a slot provided there between. A locking pin changes a position of the upper or lower eccentric bush to a maximum eccentric position. Upper and lower brake units are, respectively, provided between the upper eccentric cam and the upper eccentric bush, and between the lower eccentric cam and the lower eccentric bush. The upper and lower brake units, respectively, include first and second upper brake balls, and first and second lower brake balls, to restrain the upper and lower eccentric bushes.

Abstract: A variable capacity rotary compressor is designed to prevent eccentric bushes from slipping during a compression operation, and thereby prevent noise from being generated and increase durability. The variable capacity rotary compressor includes a housing to define first and second compression chambers having different capacities therein. First and second eccentric cams are mounted to a rotating shaft to be placed in the first and second compression chambers, respectively. First and second eccentric bushes are rotatably fitted over the first and second eccentric cams, respectively. First and second rollers are rotatably fitted over the first and second eccentric bushes, respectively. First and second vanes partition the first and second compression chambers, respectively.

Abstract: A variable capacity rotary compressor including upper and lower compression chambers having different interior capacities, and a rotating shaft. Upper and lower eccentric cams are provided on the rotating shaft to be eccentric from the rotating shaft in a same direction. Upper and lower eccentric bushes are fitted over the upper and lower eccentric cams, respectively, in such a way that a maximum eccentric part of the upper eccentric bush is opposite to that of the lower eccentric bush, with a slot provided between the upper and lower eccentric bushes. A locking pin functions to change a position of the upper or lower eccentric bush to a maximum eccentric position. Further, upper and lower brake units are respectively provided between the upper eccentric cam and the upper eccentric bush, and between the lower eccentric cam and the lower eccentric bush.

Abstract: A variable capacity rotary compressor is designed to prevent eccentric bushes from slipping during a compression operation, thus preventing noise from being generated and increasing durability. The compressor includes a housing to define two compression chambers having different capacities therein. A rotating shaft is rotated in the compression chambers. Two eccentric cams are mounted to the rotating shaft. Two eccentric bushes are rotatably fitted over the eccentric cams. Two rollers are rotatably fitted over the eccentric bushes. Two vanes are installed in the compression chambers to be reciprocated in a radial direction of the rotating shaft. A cylindrical connecting part integrally connects the eccentric bushes to each other, with a locking slot being provided around the connecting part.

Abstract: Several transmission embodiments selectively communicate rotary drive to an orbiting scroll to achieve capacity modulation. In these embodiments, when the motor is driven in a first direction, the orbiting scroll is driven at a rate which is equal to the motor speed. However, if the motor is driven in a reverse direction, the orbit rate of the orbiting scroll is reduced. The transmission ensures that the orbiting scroll member itself is driven in the proper forward direction regardless of whether the motor is being driven in forward or reverse.

Abstract: An electromagnetic clutch for a compressor includes a rotor, an armature, an electromagnetic coil for bringing the rotor into contact with the armature and for separating the rotor from the armature, and a temperature detection device, such as a temperature fuse or a temperature switch, or both, for detecting an excessive increase in temperature ascribed to slippage between the rotor and the armature or a temperature increase of refrigerant discharged from the compressor. An electric circuit of the temperature detection device is separated from the electric circuit of the electromagnetic coil. An abnormal condition may be accurately detected by the separate circuit structure, and a proper response to the abnormal condition may be taken quickly.

Abstract: A variable capacity rotary compressor, which is designed to make an internal pressure of a compression chamber, where an idle rotation is executed, be equal to an outlet side pressure of the rotary compressor, thus minimizing a rotating resistance. The compressor includes a housing partitioned into two compression chambers having different capacities by a partition plate. A rotating shaft rotates in the compression chambers. Two eccentric units are mounted to the rotating shaft to be placed in the compression chambers, and execute a compression rotation and an idle rotation according to a rotating direction of the rotating shaft. A pressure control unit functions to apply the pressure of the outlet side of the compressor to the compression chamber which executes the idle rotation. The pressure control unit includes a path control channel which is vertically provided through the partition plate to be placed at a position outside the compression chambers.

Abstract: A variable rotary compressor with a capacity being variable as desired includes a drive device generating a rotating force, a rotating shaft connected to the drive device at a first end thereof and rotated by the drive device, and a cylinder through which a second end of the rotating shaft passes. Two or more compressing chambers are provided in the cylinder such that the two or more compressing chambers are sequentially arranged along an axial direction of the rotating shaft. Rollers are eccentrically installed on the rotating shaft such that the rollers are arranged, respectively, in the two or more compressing chambers. A one-way clutch is installed on the rotating shaft to selectively transmit the rotating force to at least one of the rollers in accordance with a rotating direction of the rotating shaft. During operation of the rotary compressor, only one of the rollers is selectively rotated.

Abstract: A rotary compressor includes a rotor rotatably disposed to be eccentric to an inner peripheral surface of a housing, a rotation shaft for transmitting rotation force of an engine to the rotor, and a connection member through which the rotation shaft is connected to the rotor so that the rotation force is transmitted from the rotation shaft to the rotor. When a rotation speed of the rotation shaft is lower than a predetermined valve, the connection member is connected to the rotation shafts at the rotation force of the rotation shaft that is transmitted to the rotor. On the other hand, when the rotation speed of the rotation shaft is equal to or higher than the predetermined value, the rotation force from the rotation shaft to the rotor is interrupted, so that the rotary compressor is stopped. Therefore, useless load applied to the engine can be restricted.

Abstract: A scroll compressor having a reversion preventing device includes: a driving unit inserted in a closed casing and generating a driving force; a compressing unit for compressing and discharging a fluid when the driving unit is driven; a rotational shaft rotatably supported by a main frame and a sub-frame that are fixed at the casing and transmitting the rotational force generated from the driving unit to the compressing unit; and a reversion preventing device installed at one side of the rotational shaft and stopping the rotation of the rotational shaft when the driving unit is rotated in a direction opposite to the direction in which the driving unit compresses the fluid. Since the reversion preventing device is installed at the rotational shaft in order to stop the rotation of the rotational shaft if the rotational shaft is rotated in the reverse direction, blocking the driving unit from being rotated in the reverse direction.

Abstract: A variable rotary compressor for refrigeration cycles, with a capacity being variable as desired includes a drive device generating a rotating force, a rotating shaft connected to the drive device at a first end thereof and rotated by the rotating force of the drive device, and a cylinder through which the second end of the rotating shaft passes. In the variable rotary compressor, two or more compressing chambers are provided in the cylinder such that the two or more compressing chambers are sequentially arranged along an axial direction of the rotating shaft. Rollers are eccentrically installed on the rotating shaft such that the rollers are arranged, respectively, in the two or more compressing chambers. A one-way clutch is installed on the rotating shaft to selectively transmit the rotating force of the rotating shaft to at least one of the rollers in accordance with the rotating direction of the rotating shaft.

Abstract: A low cost protective clutch member is positioned adjacent an end of the drive shaft in a scroll compressor. The device is a thin washer having a tab which is selectively driven against the housing stop when the compressor is driven in a forward direction, but is movable into a notch in the shaft when the shaft is driven in a reverse direction. The tab prevents rotation of the shaft when in the notch.

Abstract: A rotary compressor includes a rotor rotatably disposed to be eccentric to an inner peripheral surface of a housing, a rotation shaft for transmitting rotation force of an engine to the rotor, and a connection member through which the rotation shaft is connected to the rotor so that the rotation force is transmitted from the rotation shaft to the rotor. When a rotation speed of the rotation shaft is lower than a predetermined valve, the connection member is connected to the rotation shaft so that the rotation force of the rotation shaft is transmitted to the rotor. On the other hand, when the rotation speed of the rotation shaft is equal to or higher than the predetermined value, the rotation force from the rotation shaft to the rotor is interrupted, so that the rotary compressor is stopped. Therefore, useless load applied to the engine can be restricted.

Abstract: A scroll compressor including a housing having a compression mechanism and a motor disposed therein, rotatively coupled by a drive shaft. A crankcase is disposed in the housing and supports the compression mechanism. A brake element is operatively engaged with the crankcase with at least one roller located therebetween. The roller has a first position relative to the brake element and the crankcase when the compressor operated in a forward direction, in which forward motion of the orbiting scroll member is unimpeded. At the onset of reverse rotation, the roller has an assumed second position relative to one of the brake element and the crankcase, in which the roller is in binding engagement with the brake element and the crankcase to arrest reverse motion of the orbiting scroll member.

Abstract: The invention is related to a pump, preferably a positive-displacement pump, comprising: a) a rotary drive member (1) driven at a speed dependent on a speed of a driving motor; b) a casing (3); c) and a first feed wheel (5) arranged in said casing (3), said first feed wheel (5) being coupled to said rotary drive member (1) for introducing a torque; d) said first feed wheel (5) forming, with the walls of said casing alone or in conjunction with a second feed wheel (6), a delivery space (7) comprising a low-pressure side (8) connected to a pump inlet port and a high-pressure side (9) connected to a pump outlet port; wherein: e) limiting delivery of said pump is achieved by using a magnetic clutch (11-17) which couples said rotary drive member (1) to said first feed wheel (5) for transmitting said torque; f) an input half (11-14) of said magnetic clutch (11-17) is non-rotatably connected to said rotary drive member (1), and an output half (15-17) of said magnetic clutch (11-17) is non-rotatably connected

Abstract: A scroll compressor including a housing having a compression mechanism and a motor disposed therein, rotatively coupled by a drive shaft. A crankcase is disposed in the housing and supports the compression mechanism. A brake element is operatively engaged with the crankcase with at least one roller located therebetween. The roller has a first position relative to the brake element and the crankcase when the compressor operated in a forward direction, in which forward motion of the orbiting scroll member is unimpeded. At the onset of reverse rotation, the roller has an assumed second position relative to one of the brake element and the crankcase, in which the roller is in binding engagement with the brake element and the crankcase to arrest reverse motion of the orbiting scroll member.

Abstract: A multiple-module, oil-flooded, rotary screw compressor wherein a plurality of compressor modules are driven by a single drive shaft. The modules are positioned in parallel so that a large volume of compressed air can be provided for use in equipment which continuously requires a large supply of such air. The compressor is configured so that each rotary screw compressor module includes a driven gear engaged with the same gear on the drive shaft. The compressor modules may share a common inlet cavity and a common outlet cavity.

Abstract: A low cost protective clutch member is positioned adjacent an end of the drive shaft in a scroll compressor. The device is a thin washer having a tab which is selectively driven against the housing stop when the compressor is driven in a forward direction, but is movable into a notch in the shaft when the shaft is driven in a reverse direction. The tab prevents rotation of the shaft when in the notch.

Abstract: The invention is related to a pump, preferably a positive-displacement pump, comprising:

Abstract: A drive system is provided for coupling a clutch assembly with a pump assembly that provides fluid power to cool, lubricate and control the operation of the clutch. The drive system comprises a drive coupling rotatably supported on an input shaft by a plurality of bearing members. The bearing members permit the drive coupling to rotate independent of the rotation of the input shaft. The drive coupling is provided with at least two splined surfaces for engaging a corresponding splined surface on both the clutch assembly and the pump. The drive system counteracts radial loads generated within the pump and moment loads generated at the splined connections to prevent premature wear or damage to the pumping elements and mating components.

Abstract: A low cost protective clutch member is positioned adjacent an end of the drive shaft in a scroll compressor. The device is a thin washer having a tab which is selectively driven against the housing stop when the compressor is driven in a forward direction, but is movable into a notch in the shaft when the shaft is driven in a reverse direction. The tab prevents rotation of the shaft when in the notch.

Abstract: A scroll compressor is provided with a clutch to minimize or eliminate the detrimental effects of reverse rotation. Generally, the clutch prevents rotation of the shaft during both powered and unpowered reverse rotation. The clutch could be subject to damage during powered reverse rotation, and thus a clutch protection mechanism is incorporated that will prevent the clutch from moving to an actuated position if powered reverse rotation occurs.

Abstract: Two rotary vane pumps driven by a common drive shaft with each pump sharing a common intake. Each pump's rotor is connected to the drive shaft by shear means. A valve is utilized to seal off a failed pump, and to protect the operating pump from foreign objects created by the failed pump. If either rotary vane pump fails its shear means, the other pump continues to operate unaffected, and maintains nominal pump performance.

Abstract: A scroll compressor is provided with a clutch to minimize or eliminate the detrimental effects of reverse rotation. Generally, the clutch prevents rotation of the shaft during both powered and unpowered reverse rotation. The clutch could be subject to damage during powered reverse rotation, and thus a clutch protection mechanism is incorporated that will prevent the clutch from moving to an actuated position if powered reverse rotation occurs.

Abstract: A supercharger clutch system has a clutch housing (52) in which a clutch pack (84) is disposed to transmit torque from an input, such as a pulley (66), to one of the timing gears (58). The clutch pack (84) is disposed within a cage (92), having a spring seat member (98) adjacent thereto. A set of springs (104) biases the seat member and the clutch cage (92) to engage the clutch pack (84). On the opposite side, axially, of the clutch pack there is a piston (76) including a portion (80) surrounding the clutch cage (92) and engaging the seat member (98). The piston (76) and the clutch housing (52) define a pressure chamber (106) which, when pressurized, causes movement of the piston in a direction compressing the springs (104) and disengaging the clutch pack. With the invention, the clutch system can be operated by engine lubrication oil, while still achieving rapid engagements (short response time), wherein the rate of engagement can be modulated to suit vehicle operating conditions.

Abstract: A simplified drive arrangement is provided to allow a scroll compressor to be operated at two capacity levels by a reversible electric motor. A pair of one-way clutches are positioned on a pair of parallel shafts. When the motor is driven in a forward direction drive passes through one of the one-way clutches and directly to the orbiting scroll. However, when the motor is driven in a reverse direction, drive passes through a countershaft, which in turn passes through a second one-way clutch. The drive passing through the second one-way clutch will result in the orbiting scroll being driven at a distinct speed then when the motor is driven in a reverse direction. In this way, capacity modulation is achieved with a very simple mechanism.

Abstract: A method and apparatus for hydraulically engaging and disengaging a hydraulic motor comprising a rotor and a stator.

Abstract: Disclosed are a gas compressor and an air conditioning system in which an anomalous temperature rise in an electromagnetic clutch is detected at an early stage to stop the operation of the gas compressor. A temperature sensor is mounted at a position in the vicinity of a portion of the electro-magnetic clutch which is subject to anomalous heat generation. When there is a rise in the temperature as detected by the temperature sensor, a driving circuit of the electro-magnetic clutch is interrupted before trouble is caused by an abnormally high temperature.

Abstract: A method and apparatus for hydraulically engaging and disengaging a hydraulic motor comprising a rotor and a stator.

Abstract: Two rotary vane pumps driven by a common drive shaft with each pump sharing a common intake. Each pump's rotor is connected to the drive shaft by shear means. A valve is utilized to seal off a failed pump, and to protect the operating pump from foreign objects created by the failed pump. If either rotary vane pump fails its shear means, the other pump continues to operate unaffected, and maintains nominal pump performance.

Abstract: A plurality of rotary assemblies driven by gas pressure having internal cam activated retractable gates selectively coupled to a rotary compressor. The rotary compressor is selectively coupled through a clutch to a shaft. The shaft is rotated by the plurality of rotor engine assemblies that are driven by gas pressure. A gate is coupled to a cam follower bearing that rides on an internal surface of the rotor housing, causing the gates to form chambers within the rotor as well as move out of position to pass a chamber divider. The shaft may be coupled to a load to do work.

Abstract: In an electromagnetic clutch having a rotating component, groove portions (21a, 21b) are made on a surface of the rotating component to induce air flow during rotation of the rotating component. The air flow enhances radiation of heat from the electromagnetic clutch. It is preferable that the groove portion is formed at each of axial ends of a driving rotor or pulley (12) included as the rotating component in the electromagnetic clutch.