Abstract: A variable displacement swash plate type compressor which incorporates a swash plate slidably mounted on a drive shaft, the swash plate having side walls that taper toward one another for constant point contact with a ball bearing of an associated piston which results in a smaller required diameter for the swash plate and smoother operation of the compressor over prior art structures.

Abstract: According to the structure for damping the pulsations of discharge pressure of a compressor of the present invention, in the annular discharge chamber 28 divided on the outer circumferential side in the rear housing 5, two bulkhead sections 35 are extended from positions on both sides of the outlet 23 in the circumferential direction in such a manner that they are separate from each other. The end portion of each bulkhead section 35 is extended to halfway between the first discharge port section 20 and the second discharge port section 21. The flow path from the first discharge port section 20 to the outlet 23 is directed to the opposite side to the outlet 23 and then turned back to the outlet 23. Therefore, the length of the flow path from the first discharge port section 20 to the outlet 23 becomes relatively long.

Abstract: An elaborately designed miniature air compressor is composed of a motor unit, a compression unit, and an air collection unit. Several bladders installed in the compression unit are sequentially actuated by a compression vane with a thrust and pulling force imparted from priston like motion caused by revolution of an eccentrically installed follower rod such that air is continuously supplied to the air collection unit and ejected out of an air output port uniformly, stably, and adequately. Besides, all component units of the miniature air pump are combined together by two shackles in stead of using latch pins.

Abstract: A compressor includes a cylinder block having a cylinder bore. A valve plate assembly is located between the cylinder block and a rear housing. The valve plate assembly includes a plurality of plates. The rear housing is connected with the cylinder block through the valve plate assembly. A pair of pins engage all the plates to determine the position of the valve plate assembly relative to at least one of the cylinder block and the rear housing.

Abstract: The object of the present invention is to offer a structure of a suction valve enough to prevent a noise or clatter caused by vibrations of a suction valve in a variable displacement compressor having pistons. The suction valve is a bendable flexible valve composed of flexible portions, and of a closing portion placed adjoining to the flexible portions to form a free end to close a suction port. The lengths of the flexible portions of the suction valve are nearly equal, but the widths of the flexible portions of the suction valve are different each other.

Abstract: An axial plunger pump according to the present invention is constructed so as to comprise a shaft having a swash plate effecting swing motion and transmitting driving force from the outside, plungers each reciprocating by the swing motion of the swash plate, a cylinder block having cylinders formed so as to open on the side of the swash plate and inserting therein the plungers and having passages for supplying fuel to the cylinders, a body combined with the cylinder block to enclose the swash plate, and sealing members arranged between the plungers and the cylinders on the swash plate side of the passages formed in the cylinder block for sealing gaps between the plungers and the cylinders, respectively.

Abstract: A gasket 36 is interposed between an end face 341 of a front housing 11 and an end face 351 of a rear housing 12. A coned disc spring 37 is interposed between an end face 192 of a cylinder 19 and the end face 341 of the front housing 11. When the end faces 341, 351 are caused to approach each other so as to be joined together, the coned disc spring 37 is first held by the end face 341 of the front housing 11 and the end face 192 of the cylinder 19. When the end faces 341, 351 are caused to approach each other further so as to be joined together, the gasket 36 is held between the end faces 341, 351.

Abstract: The deformation of cylinder bores in a cylinder block is prevented. The cylinder block 19 is inserted into a front housing 11. The cylinder block 19 is fixed to the front housing 11 by tightening plural screws 38 which penetrate through the cylinder block 19, from an end surface 191 side thereof, to be screwed into an end wall 32 of the front housing 11. Plural deformation absorbing grooves 39 are provided on the end surface 191. Each one of the deformation absorbing grooves 39 is provided in each intermediate space between the adjacent paired cylinder bores 41.

Abstract: A seal structure used in a compressor has a first member, a second member and a seal member with a rigidity. The first member has a surface in a first shape. The first shape has at least a first contacting portion. The second member has a surface in a second shape. The second shape has at least a second contacting portion. The first shape and the second shape are complementary with each other. The seal member has a first seal surface and a second seal surface. The seal member is located between the first contacting portion and the second contacting portion. The seal member has a sufficient area to cover at least the first contacting portion and the second contacting portion. The seal member is press-contacted and correspondingly deformed by the first contacting portion and the second contacting portion, thereby creating a seal between the first member and the second member.

Abstract: The compressor has a cooling structure to effectively cool a shaft seal device interposed between a housing of the compressor and a rotary shaft. The front housing has a through-hole through which the rotary shaft extends, and the shaft seal device is arranged in the through-hole. A passage (suction passage portion) is connected to the thorough-hole. An inlet from a portion of the passage to the through-hole is arranged right above the rotary shaft, and an outlet from the through-hole to a portion of the passage is arranged right below the rotary shaft. The passage is connected to a suction pressure region outside the compressor and to the suction chamber via the through-hole.

Abstract: An axial plunger pump includes a shaft having a swash plate effecting swing motion and transmitting driving force from the outside, plungers reciprocate by the swing motion of the swash plate. A cylinder block has cylinders formed so as to open on the side of the swash plate, with the plungers inserted therein. Passages in the block supply refuel to the cylinders. A body combined with the cylinder block encloses the swash plate. Sealing members are arranged between the plungers and the cylinders on the swash plate side of the passages formed in the cylinder block for sealing gaps between the plungers and the cylinders, respectively.

Abstract: A swash plate compressor including a housing secured to a cylinder block having cylinder bores axially formed therethrough for receiving respective pistons therein. A swash plate is mounted on a drive shaft extending through a crankcase defined within the housing, for rotation in unison with the drive shaft. The swash plate has sliding surfaces on opposite sides thereof. A pair of shoes, each of which has a substantially semispherical shape, which slide on the sliding surfaces of the swash plate. Each piston is connected to the swash plate via a corresponding pair of the shoes, and performs a linear reciprocating motion within a corresponding cylinder bore. Guide grooves are each axially formed in an inner peripheral wall of the housing along a path of the linear reciprocating motion of the corresponding piston.

Abstract: Pistons are accommodated in each cylinder bores of a variable displacement compressor. A swash plate is coupled to the piston for converting rotation of the drive shaft to reciprocation of the pistons. A thrust bearing located between a rotor and a housing of the compressor. The outermost load-bearing points of the thrust bearing are radially farther from the axis of the drive shaft than the axes of the pistons. This permits the thrust bearing to directly receive a reaction forces from the pistons through the rotor without applying a moment to the bearing.

Abstract: The piston type compressor of the present invention prevents high pressure refrigerant from leaking out of the compressor through the end face of the cylinder block and also prevents the degradation of the performance of the compressor due to the leakage of the refrigerant gas. The cylindrical wall (3a), which is placed radially outside the front coupling surface (F) formed by the front end face of the cylinder block (1) and the rear end face of the front housing (2), and the rear coupling surface (R) formed by the rear end face of the cylinder block (1) and the front end face of the rear housing (3), is formed integrally with the rear housing (3) and encloses the front coupling surface (F) and the rear coupling surface (R). The front end face of the cylindrical wall (3a) and the rear end face (20a) of the motor housing (20) are coupled together and a hermetic space is formed internally.

Abstract: Sufficient pressure is produced in a pocket of a hydrostatic bearing when a corresponding cylinder is about to switch from a suction stroke to a discharge stroke in order to prevent solid contact of sliding faces. A plurality of cylinders are arranged on a circle around a center axis of a cylinder block rotatably supported in a housing. Pistons reciprocates in the respective cylinders. A suction port and a discharge port provided to the housing selectively communicate with the respective cylinders in accordance with a rotational position of the cylinder block. A drive shaft inclined relative to the center axis of the cylinder block, a rotation transmitting mechanism for transmitting rotation of the drive shaft to the cylinder block for rotating the cylinder block synchronously with the drive shaft, and a rotating disk rotating together with the drive shaft and cooperatively engaged with the pistons are further provided.

Abstract: A refrigerant compressor includes a cylinder block, a front housing, and a sealing member. The cylinder block has a cylindrical portion. The cylindrical portion has an internal thread formed on an end thereof. The front housing having an external thread engages the internal thread. The front housing is fixed to the cylinder block and forms a crank chamber with the cylinder block. The pressure capacity of the refrigerant compressor may be increased without an increase in the size of the compressor.

Abstract: A valve structure includes a central valve plate having a valve hole, and a flexible valve element having a root portion lying on the central valve plate and a bendable portion to open and close the valve hole. A retainer element has a retaining surface to restrict deformation of the valve element when it is bent toward the retainer element to open the valve hole. The profile is expressed in a two-dimensional coordinate system (x, y), and the freely bent shape is represented by coordinates (x, f(x)) obtained by pushing the valve element at an abscissa position corresponding to the center of the valve element. The retaining surface has a profile containing a coordinate (x′, f(x′)−K) so that the profile is displaced toward the central valve plate with respect to a freely bent shape of the valve element.

Abstract: A dual pump unit comprising two hydraulic pumps (2,3) with coaxially mounted drive shafts (4,5) that are coupled to each other in a non-positive fit by means of a coupling member (28). The coupling member (28) surrounds a connecting member (15), wherein high pressure lines (29,30) and low pressure lines (31,32) are formed. The connecting member (15) extends between two control bodies (33) that are respectively associated with one hydraulic pump (2,3) and which are used to create a cyclic connection between the cylinders (18,19) of the hydraulic pumps (2,3) and the high pressure lines (29,30) and low pressure lines (31,32). The connecting member (15) consists of two connector plates (13,14) defining one of the hydraulic pumps (2,3) respectively on the control bodies (33,43) and an individually formed interchangeable intermediate element (38) arranged between the connector plates (13,14).

Abstract: An axial piston pump of the swash-plate variety having a rotating cylinder block and pistons movable in a longitudinal direction within bores formed in the block, and having a reversing capacitance for reducing pressure pulsations. For the further reduction of such pulsations, one or more channels, each having an associated discharge opening, are formed into a web of the valve plate of the pump to sequentially couple the reversing capacitance into fluid communication with the cylinder bores passing across the web.

Abstract: The drive part for converting the revolution movement to the wobble movement is composed of the shaft for transmitting the drive force from outside, the swash plate rotated by the shaft and the wobble plate for converting the revolution movement of the swash plate to the wobble movement. Plural pistons are reciprocated in responsive to the wobble movement of the wobble plate. The crank room containing the swash plate, the wobble plate and the piston is separated into the fuel room and the drive room by the bellows. The bearings for transmitting the drive force between the shaft in the drive room and the swash plate, and the bearing for transmitting the drive force between the swash plate and the wobble plate are placed inside the drive room in order to lubricate the bearings. By arranging plural pistons inside the fuel room, the fuel is forced to be taken in and discharged by the reciprocate movement of the individual pistons.

Abstract: A hydraulic rotating axial piston engine has a housing enclosing a rotatable cylinder barrel. The barrel has a number of axial cylinders with a number of reciprocating pistons. The pistons reciprocate between two defined end positions, and cooperate with an angled plate in order to obtain the reciprocating movement. The cylinder barrel is rotatable relative to a first axis, which is inclined relative to a second axis of an input/output shaft. The housing has two parts, one part of the housing positions the input/out shaft and a second part includes inlet and outlet channels. The rotation of the cylinder barrel and the input/output shaft is synchronized by means of synchronizing means. A central support pin extends along the first axis between the angled plate and the cylinder barrel. The support pin is at one end axially connected with the angled plate, and at the other end axially connected to the cylinder barrel. The support pin limits axial movement at the cylinder barrel relative to the angled plate.

Abstract: An axial bevel gear generated control motion is used to control an accelerating-decelerating vane motion in a cylindrical central axis main pressure chamber using a limited angle differential gear whose reversing gear is receiving an axial crank controlled motion from an orbiting bevel gear or in a modified version from an oscillation controlling barrel cam. Same bevel gear crank generated axial motion is also used to provide an axial piston motion in cylinders with one or more pistons which can be in a stationary or rotating cylinder housing. In all the different models a valveless port communication with a radial or axial flow distribution control is used for a pressurized fluid flow which is suited to external pressure or internal combustion engines where the energy conversion is from a fluid or combustion pressure to a powered output shaft rotation or in a reverse energy conversion mode, the central shaft is functioning as a power input shaft for pumping or gas compressor applications.

Abstract: A hydraulic rotating axial piston engine having a housing, enclosing a cylinder barrel journaled in the housing for rotation around a barrel axis. The housing also has a number of circumferentially arranged cylinders with a number of pistons reciprocating between two defined end positions. The pistons cooperate with an angled plate in order to obtain the reciprocating movement. The axial piston engine has an input/output shaft, and the cylinder barrel has channels connecting each cylinder to port(s) in the cylinder barrel. The ports alternatively act as inlet and outlet ports. The housing has an inlet and outlet channel, each having a kidney-shaped port, facing towards the inlet and outlet ports of the cylinder barrel. The kidney-shaped ports communicate with a number of the ports at the barrel. The cylinder barrel ports extend in both directions outside the cylinders in the two circumferential directions of the cylinder barrel.

Abstract: A hydraulic rotating axial piston engine has a housing enclosing a rotatable cylinder barrel. The cylinder barrel has a number of axial cylinders with a number of reciprocating pistons therein. The pistons reciprocate between two defined end positions and cooperate with an angled plate in order to obtain the reciprocating movement. The cylinders have ports alternatingly acting as inlet and outlet ports and the housing has at least one inlet and outlet channel. The channels each have a kidney-shaped port, facing towards the inlet and outlet ports of the cylinder barrel, and communicating with a number of the ports at the barrel. The cylinder barrel is rotatable relative to a first axis, which is inclined relative to a second axis of an input/output shaft. The angled plate is rotatable together with the input/output shaft around the second axis. The rotation of the cylinder barrel and the input/output shaft are synchronized by means of synchronizing means.

Abstract: A swash plate used in a compressor. A side of the swash plate that contacts head side shoes is coated with two layers. The first layer is formed of aluminum material and the second layer is formed with solid lubricant. A side of the swash plate that contacts skirt side shoes is coated with a single layer of solid lubricant. Accordingly, the swash plate has a sufficiently wear resistance on both sides for the minimized cost.

Abstract: A swash plate type compressor comprises a cylinder block; a rotation shaft rotatably held in the cylinder block; a swash plate swingably connected to the rotation shaft to rotate therewith; a plurality of piston bores circumferentially arranged about the rotation shaft; a plurality of pistons operatively received in the piston bores respectively, each piston having a holding portion that slidably holds a peripheral portion of the swash plate, so that when the rotation shaft is rotated about its axis, the swash plate pulls and pushes the pistons thereby to reciprocate the same; a valve plate connected to a rear end of the cylinder block, the valve plate having a group of inlet openings connected to the piston bores respectively and another group of outlet openings connected to the piston bores respectively; a rear head connected to the valve plate, the rear head having an intake chamber exposed to the inlet openings and a discharge chamber exposed to the outlet openings, the intake chamber surrounding the disc

Abstract: An adjustable stop assembly (33) for limiting maximum yoke angle of a hydraulic pump(11) having a fluid displacement proportional to the angle of the yoke (25). The adjustable stop assembly (33) includes a control piston (37) for inclining the yoke (25) to define a desired yoke angle, and a stop member (57) defines a set of internal threads (67) and is disposed within a cavity (65) defined by the adjustment assembly. An adjustment screw (51) is disposed for rotational motion, comprising a portion (49) operable to retain the adjustment screw (51) reciprocally stationary relative to the adjustment assembly (33), the adjustment screw (51) further comprising a first set of external threads (53) for engagement with the internal threads (67) of the stop member (57), whereby rotation of the adjustment screw (51) causes axial travel of the stop member (57), thereby displacing the control piston (37).

Abstract: A reciprocating compressor of a type includes a cylinder block having a plurality of bores disposed in parallel with each other, a valve plate having suction ports corresponding to the respective bores, a cylinder head for closing the outer end of the cylinder block through the valve plate which is held between the cylinder head and the cylinder block and on which suction valves and discharge valves are mounted, a suction chamber formed in the cylinder head adjacent to a refrigerant introduction port, and pistons inserted into the respective bores so as to reciprocate in a predetermined phase difference. In the reciprocating compressor, partitions are disposed in the cylinder head around the outer periphery of the suction chamber for introducing suction gas into the respective bores.

Abstract: A compressor performing a compression action and having a sliding location where one member slides with respect to another member, wherein the sliding portion is formed with sliding layers comprised of a binder comprised of polyetheretherketone and a solid lubricant dispersed in the binder.

Abstract: A piston compressor includes a front housing member and a rear housing member. A suction chamber and a discharge chamber are defined either in the front housing member or in the rear housing member. A cylinder block is accommodated in a space defined by the front housing member and the rear housing member to be isolated from ambient air. Cylinder bores are defined in the cylinder block. Pistons are accommodated in the cylinder bores. A drive shaft is connected to each piston and is supported by the cylinder block. The front housing member and the rear housing member are connected with each other, and the cylinder block is fixed to one of the housing members. The compressor is sealed in an improved manner.

Abstract: A piston-type compressor includes a cylinder block having cylinder bores and a rear housing having a separating wall to divide the interior of the rear housing into a suction chamber and a discharge chamber. Pistons are arranged in the cylinder bores to reciprocate therein. Bolts are inserted in the cylinder block and extend into the separating wall of the rear housing to connect the cylinder block and the housing together. Since the separating wall is forced to the cylinder block by the bolts, no leakage occurs between the suction chamber and the discharge chamber.

Abstract: A piston includes an engaging portion for engaging with a piston drive mechanism for reciprocating the piston, a hollow head portion with an opening at its one end, and a disc-shaped end plate for closing the opening of the hollow head portion. The piston further includes a central axial protrusion extending in the axial direction. The protrusion is formed integrally with the hollow head portion. The end plate is connected to the central axial protrusion of the hollow head portion. The end plate also has a protrusion protruding towards the central axial protrusion of the hollow head. One of the protrusions has a fitting hole to which the other is press-fitted, thereby connecting the hollow head portion to the end plate to close the opening of the hollow head portion. A diameter of the disc-shaped end plate is smaller than an outer diameter of the cylindrical hollow head portion.

Abstract: The compressor of the present invention includes a mounting section which is arranged in the outer circumferential section of a compressing housing provided with a compressing chamber, the mounting section having insertion holes (61a, 62a) into which a mounting bolt (64) is inserted, and the mounting section having a highly rigid section (bush) (63) for suppressing the deformation caused in the process of mounting the compressor.

Abstract: A compressor has a housing, which supports a rotary shaft, and a crank chamber. A swash plate is accommodated in the crank chamber. The compressor has an oil chamber located in the housing near a front end portion of the rotary shaft. The oil chamber has an inlet and an outlet. The outlet connects to the suction pressure zone. Either lubricant oil that is separated from refrigerant gas or refrigerant gas in the suction pressure zone flows into the oil chamber from the inlet and flows out from the outlet to the suction pressure zone. A seal mechanism seals the oil chamber. A seal seals between the oil chamber and the crank chamber. This permits an inclination angle of the swash plate to control accurately and smoothly while lubricating the seal mechanism optimally.

Abstract: A reciprocating compressor is provided with a plurality of gas compression means having a cylinder and a piston, the piston of each gas compression means is cooperated with the compressor by converting a rotating motion of a crankshaft provided on an electric drive source to a reciprocating motion by a scotch yoke mechanism, wherein an increase of the volume of discharged gas can be achieved without designing a gas compression means to be wide or without increasing the number thereof, a pulsation of discharged gas can be decreased by an attachment of an expansion muffler on the cylinder head so as to decrease a vibration and noise of the compressor, an attachment of the fly wheel to the crankshaft and an adjustment of the shaft with the crankshaft can be improved easily, further compressed gas flows are joined and discharged in concentration, thereby the pulsation of discharged gas can be restrained.

Abstract: A single-headed piston type swash plate compressor, realizing a lighter weight, provided with a housing internally defining and forming cylinder bores, a crank chamber, a suction chamber, and a discharge chamber; single-headed pistons accommodated in the cylinder bores to be able to reciprocate therein; a drive shaft driven by an external drive source and supported rotatably by the housing; a swash plate supported by the drive shaft to be rotated synchronously with the drive shaft; and a pair of shoes provided at the front and rear of the swash plate for driving the pistons; wherein the shoes are mainly comprised of a resin.

Abstract: In order for a high-pressure cleaner having a reciprocating pump, on which there is positioned a pump head into which at least one piston, which can be moved back and forth in the longitudinal direction of the reciprocating pump, projects, the pump head comprising a suction connection, for feeding a cleaning liquid, and a pressure connection, for discharging the cleaning liquid, accommodating a plurality of regulating valves, being produced from plastics and being braced with the reciprocating pump by means of a clamping element, to be developed such that it can be produced more cost-effectively and assembled more straightforwardly, it is proposed that the clamping element has at least one U-shaped clamping bracket with a base part butting against the pump head and with two legs which are aligned substantially in the longitudinal direction of the reciprocating pump and the free ends of which butt against an abutment surface, produced from metal, of a piston guide of the reciprocating pump and can be connected

Abstract: A housing includes a crank chamber and cylinder bores. Pistons are accommodated in the cylinder bores. A drive shaft is supported by the housing to pass through the crank chamber. A lug plate is fixed to the drive shaft. The pistons are coupled to the lug plate, which converts rotation of the drive shaft into reciprocation of the pistons and compresses gas in the cylinder bores. A thrust bearing is located between the housing and the lug plate and transmits a thrust load applied to the lug plate. The thrust bearing includes a front race located next to the housing, a rear race located next to the lug plate, and rollers located between the front and rear races. A front seat for supporting the front race is formed on the housing. A rear seat for supporting the rear race is formed on the lug plate. The diameters of the front and rear seats are different, which causes elastic deformation of the races when a thrust load is applied.

Abstract: A hydraulic rotating axial piston engine having a housing enclosing a rotatable cylinder barrel. The engine has a number of axial cylinders with a number of reciprocating pistons. The pistons reciprocate between two defined end positions, and cooperate with a plate angled relative to a rotational axis of the barrel in order to obtain the reciprocating movement. The cylinders have ports alternatively acting as inlet and outlet ports. The housing has an inlet and an outlet channel, each having a kidney shaped port, facing towards the ports of the cylinders and communicating with a number of the cylinder ports. The housing has two parts, one of the housing parts defines the turning positions of the barrel in the end positions of the pistons. A second housing part defines the turning positions of the kidney shaped ports, relative to the end positions. The first and second parts of the housing are alternatively positionable in two different turning positions in the rotational direction of the cylinder barrel.

Abstract: A compressor which has a housing defining therein a suction chamber, a discharge chamber and a crank chamber, a drive shaft rotatably supported in the housing, a first end of which penetrates through the suction chamber and protrudes from the housing, and a second end of which is disposed in the crank chamber, a single-headed piston accommodated in a cylinder formed in the housing, and a swash plate integrally rotatably mounted on the drive shaft and coupled with the piston. The cylinder is located between the crank chamber and the first end of the drive shaft so that pressure in the crank chamber acts on the drive shaft in an opposite direction of compressive reaction force acting on the drive shaft. A shaft seal is provided on the drive shaft between the suction chamber and the first end of the drive shaft in order to seal the suction chamber.

Abstract: A valve housing of the control valve has a communication passage communicating a suction port of the compressor with a crank chamber of the compressor. A main valve is provided in the valve housing for opening and closing the communication passage. A spring member resiliently biases the main valve toward its closed position. A pressure actuated unit moves the main valve toward the open position by receiving a suction pressure of the compressor. A flow adjustment valve is disposed in the valve housing for adjusting an open degree of a leak passage and receives the discharge pressure exerting a force on the flow adjustment valve toward its closed position. The flow adjustment valve increases a leak flow rate of a fluid flowing from a discharge port of the compressor to a crank chamber through a leak passage when the compressor provides a lower discharge pressure. A correction spring is disposed between the main valve and the flow adjustment valve.

Abstract: A piston having anti-rotation for a swashplate compressor includes a body portion extending axially and a connecting portion spaced radially from a longitudinal axis of the body portion and extending axially. The piston also includes a pair of opposed anti-rotation wings extending radially from one end of the body portion between the connecting portion and the longitudinal axis of the body portion.

Abstract: In a swash plate type compressor in which a shoe mechanism (23a and 23b) is slidably interposed between a swash plate (21) and a piston (22) to convert a rotating motion of the swash plate to a reciprocating motion of the piston, lubricating oil is effectively supplied together with a blowby gas to the shoe mechanism. As a result, the lubricating oil favorably lubricates a sliding portion which is between the shoe mechanism and each of the swash plate and the piston. The piston is inserted in a cylinder bore (1) of a cylinder block (2) to have a sealed gap around the piston. When the swash plate is rotatably driven, the piston is reciprocated through the shoe mechanism to compress a gaseous fluid including the lubricating oil. A part of the gaseous fluid passes as the blowby gas through the sealed gap during the reciprocation motion of the piston.

Abstract: A Positive Fluid Displacement Device (PFDD) with single piece double-ended pistons connected to a crankpin for circular motion. Pistons are nested together to maintain all pistons in the same plane perpendicular to the axis of the crankshaft. Cylinders are driven in a reciprocating fashion by the pistons and are held loosely in a cylinder carriage along its axis with radial sealing engagement therebetween. Pliable members mount port plates within a housing such that there is no direct contact therebetween or with a two-layer manifold. A flat surface of the port plate is urged against the cylinder head by a pliable member which exerts a force on the center of the port plate. Grooves in the first layer of the manifold are sealed by the second layer to form fluid passageways. The cylinder head is guided in housing grooves with a pliable member. A sealing lip is integral with a piston head.

Abstract: An electric motor that has a electric motor and a compression mechanism. The motor and the compression mechanism are accommodated in a single chamber. A single shaft functions as the output shaft of the motor and the drive shaft of the compressor.

Abstract: In a compressor that can be used for supplying compressed air in motor vehicles and also for stationary systems, permanent oil filling is provided for cooling a compressor pressure area including a cylinder head and for lubricating a transmission area including a drive shaft and swash plate. The pressure area of the compressor that can be heated by the heat of compression and friction and the transmission area of the compressor are separated from one another by check valves with a delivery pump wheel being provided which transports the oil between the transmission area and the pressure area in such fashion that the oil that is heated in the pressure area is cooled in the transmission area. By cooling the oil in the transmission area, it is possible for a middle housing section of the compressor housing, as well as a housing section delimited by a cylinder head and receiving the piston arrangement, to be made of plastic.

Abstract: A compressor (10) for a vehicular air conditioning system includes a cylinder block (12) having a bore (14). A piston (78) is slidingly received in the bore (14). A cylinder head (16) is mounted on the cylinder block (12) and includes a suction chamber (20) and a discharge chamber (22). A valve plate (18) is provided between cylinder block (12) and the cylinder head (16). The valve plate (18) includes a suction port (26) and a discharge port (35). A suction valve (28) cooperates with the suction port (26) to permit refrigerant to enter the bore (14) from the suction chamber (20). The suction valve (28) includes a terminating portion (28A) and a flexing portion (28B). A recess (32) is formed in the cylinder block (12) adjacent the flexing portion (28B) of the suction valve (28). The recess (32) provides a linear clamping line (C) on the suction valve (28) between the valve plate (18) and the cylinder block (12).

Abstract: There is provided a reciprocal motion type compressor which has a piston reciprocally movable in a cylinder. The piston has a piston cover and a piston body portion. The piston cover has an insertion portion engaged with the piston body portion. The insertion portion has a sectional shape which becomes smaller gradually from the cover portion toward an end surface of the insertion portion. This structure provides an increased tensile strength of the piston.

Abstract: A suction port as a fluid port of a piston type compressor is contoured with reference to a middle line passing through a middle point of a maximum length of the suction port in the longitudinal direction of the suction valve and perpendicularly crossing a reference line extending in the longitudinal direction. The middle line divides the suction port into a first section positioned on the proximal end side and a second section positioned on the distal end side. An area of the second section is greater than an area of the first section. A width increasing region is disposed in which the width of the suction port becomes gradually greater from the proximal end side to the distal end side, and the length of the width increasing region occupies a major part of the maximum length of the suction port.

Abstract: In an axial piston pump having an oblique disk, the axial piston pump includes a piston drum with pistons disposed therein that are displaceable by way of a holder that runs along the oblique disk. The angle of engagement of the oblique disk can be increased. On the outer side of a spherical adjustment surface provided on a component of a shaft, there are at least two glide blocks that are rotatable about a rotational mount and that exhibit an axial extent with respect to the drive shaft axis. For the purpose of transmitting torque from the drive shaft to a holder, the glide blocks are engaged with grooves that are provided in the holder, and in particular in the wall of the holder that circumscribes a receiving bore of the holder.