Abstract: A piston with a slide shoe for a hydraulic piston engine, where the slide shoe comprises a ball socket, and where the piston is arranged with a corresponding ball head, whereby these are joined in a ball-and-socket joint, and where at least partially the ball head is constituted of a spherical surface of a friction reducing material moulded onto and retained in relation the piston. As a consequence of the subsequent shrinking of the moulded-on, friction reducing material, a possibility is obtained of good fixation of the ball head on the piston, while at the same time a gap can be created between the ball socket and the ball head.

Abstract: A swash plate is mounted on a drive shaft in a crank chamber. The swash plate rotates integrally with the drive shaft and changes its inclination angle based on the pressure in the crank chamber. Pistons are provided in cylinder bores and coupled to the swash plate. The rotation of the swash plate is converted into reciprocation of each piston in the associated cylinder bore. The pistons'reciprocation draws the gas from a suction chamber into the compression chamber. The gas is compressed and discharged into the discharge chamber. A lug plate that integrally rotates with the drive shaft is mounted on the drive shaft. The lug plate has a receptacle. The receptacle has a pair of side walls that are spaced apart. The swash plate has an arm extending perpendicular to the swash plate. The arm has a distal end surface extending perpendicular to the axis of the drive shaft. The head slides along the receptacle and receives a load from the swash plate.

Abstract: An improved apparatus for retaining slipper holddown pins radially in a hydraulic unit includes a cylinder block having a plurality of holes therein for respectively receiving a corresponding plurality of elongated slipper holddown pins, each having a maximum transverse width. The holes are adjacent to and communicate with a center bore of the cylinder block to form respective throats. The throats have a maximum width that is less than the maximum transverse width of the pins such that the pins cannot be radially displaced through the respective throats. Each hole has a side wall that extends more than 180.degree. around its central axis. The side wall defines the throat between the hole and the center bore. The shaft can be inserted into driving engagement with the center bore of the cylinder block. The slipper holddown pin has a maximum transverse width greater than the maximum width of the throat.

Abstract: A wobble drive for imparting reciprocating motion to a sickle bar includes a wobble drive shaft rotatable about a first axis and having a cylindrical wobble section formed about an axis making an angle of about 14.5.degree. to the first axis. A toroidal wobble shaft bearing housing is mounted on the wobble section by a set of wobble bearings having their outer races pressed into the bearing housing. An output yoke is coupled to the wobble shaft bearing housing for transmitting the oscillatory motion of the housing, caused by rotation of the drive shaft, to a swing arm fixed to an end of a shaft portion of the yoke. The coupling of the yoke to the wobble bearing housing is accomplished by a pair of headed spindle pins inserted, from the inside out, through pin bores provided at diametrically opposite locations in the wobble shaft bearing housing, and into respective yoke bearings mounted in the ends of a pair of yoke limbs that are joined to the yoke shaft portion.

Abstract: A lubricating mechanism for a piston type compressor in a refrigeration system. A cam plate is mounted on a drive shaft for integral rotation therewith in a crank chamber, which is defined in a casing. Pistons are coupled to the cam plate and reciprocate in cylinder bores extending parallel to the drive shaft. Each piston compresses refrigerant gas containing lubricating oil mist and discharges the compressed refrigerant gas from the compressor during rotation of the cam plate. The refrigerant gas is supplied into the crank chamber and is circulated in the casing. The lubricating oil is supplied to various moving parts from a location near the drive shaft. An oil pan is provided outside and to the side of the casing for collecting lubricating oil. A recovering passage connects the oil pan with the crank chamber to convey the lubricating oil from the crank chamber to the oil pan for collection.

Abstract: A crosshead system for a swashplate engine such as a Stirling cycle type. A plurality of crossheads are constrained to move in a reciprocating fashion by travelling along a pair of parallel guide rods. The crosshead system further includes a mechanism for adjusting a clearance between the crosshead elements and the opposed parallel face surfaces of the rotating swashplate. The adjustment mechanism includes a threaded adjuster cup which is maintained in a lock position through a fastener which drives a conical cone into the conical inside surface of the adjuster sleeve thus fixing its rotated and hence linear position.

Abstract: A compressor has a front housing, cylinder block and a rear housing. The housings and cylinder block are secured to one another by a plurality of bolts. A plurality of pistons reciprocally move in cylinder bores to compress gas. Each of said bolts has a shaft extending through the housings and the cylinder block. A cam plate is supported on a drive shaft for integral rotation therewith to convert the rotation of the drive shaft to reciprocal movement of a piston in the cylinder bore. The piston rotates about its axis in accordance with rotation force transmitted from the cam plate and abuts against the shaft of the bolt, which extends in close proximity to the piston. The rotating piston abuts against the shaft so that the rotation thereof is restricted. The shaft has a diameter greater than that of a threaded portion formed at an end of the bolt. Since the threaded portion is smaller, the threaded portion does no damage to the piston during assembly.

Abstract: A swash plate type compressor includes an improved thrust bearing for axially supporting the swash plate. The bearing is of a composite type, and includes at least two elastically deformable slide bearing elements. The swash plate and the cylinder block each have seat portions, which are of different diameters. The two bearing elements are compressed between the respective seat portions into an elastically deformed conically-shaped state, with the amount of conical deformation depending upon the amount of axial compression that is applied to the bearing by tightening the assembly bolts of the compressor. In operation, one of the conically shaped slide bearing elements is pressed outwardly against the other by centrifugal force as the compressor shaft rotates. During start up and low speed operation of the compressor, this centrifugal force will have minimal effect, and the bearing elements will rotate with respect to each other, keeping internal frictional resistance low.

Abstract: A piston with a slide shoe is described for a hydraulic piston engine, where the piston is designed with a ball socket, and where the slide shoe is provided with a corresponding ball head, whereby these are connected in a ball-and-socket joint, and where the ball head of the slide shoe is designed as a unit moulded into the ball socket in friction reducing material so that the ball head is captured in the ball socket. Hereby an improved fixation of the moulded-on all head on the slide shoe is achieved.

Abstract: The reciprocating piston machine has a wobble plate gear, in which the pins (2) are connected in articulated manner to the circumference of the wobble plate (3) by in each case one ball end (21), which engages directly or by means of an interposed slip ring (29) with a spherical inner face (30) in a guide (28) directed transversely to the piston axis. As this leads to the avoidance of connecting rods with in each case two ball ends, the machine can be given a more compact construction.

Abstract: A variable displacement swash plate type compressor has a coupling structure between a drive shaft and a swash plate in order to allow the swash plate to be movable along the drive shaft and inclinable relative to the same. The coupling structure comprises a bearing portion provided on the drive shaft to rotate therewith. The bearing portion includes first and second semicylindrical outer walls which are symmetrically arranged with respect to an axis of the drive shaft and first and second flat side walls which are symmetrically arranged with respect to the axis. Each of the first and second semicylindrical outer walls is perpendicular to each of the first and second flat side walls. The bearing portion further includes a rectangular center bore formed in a hub portion of the swash plate. The center bore is so sized and shaped as to intimately and slidably receive therein the bearing portion.

Abstract: An axial piston machine includes a housing and a rotary shaft is mounted in the housing. A plurality of radially spaced cylindrical bores are arranged concentrically around the shaft and a reciprocal piston is located in each bore. A plate is located at an angle of inclination with respect to the rotary shaft. Each piston is connected to the plate by a support body locator and first and second support bodies are located in the support body locator and are in contact with the opposed surfaces of the plate.

Abstract: A cam plate type compressor includes a cam plate having a boss and the cam plate is located in a crank chamber formed within a pair of casings. The cam plate is rotatable with a drive shaft. The compressor also has two-part bearing structure for supporting the cam plate. The bearing has a buffer structure for absorbing an axial load applied to the cam plate. One of the bearing parts is constituted by a rolling bearing and the other is constituted by a flat sliding bearing.

Abstract: A swashplate machine comprises a casing (1) provided with end members (2, 3) and a rotatable shaft (4). The shaft (4) drives a swashplate (5) through an interconnecting member (6) comprising an off-set sleeve (7) that is keyed to the shaft (4) and a non-rotating ball portion (8). The interconnecting member (6) is further supported by a pair of end cones (15). A baffle (9) fixed to the casing (1) intersects the swashplate (5) and an oscillatable pivotable slotted member is provided at the intersection. The arrangement of the swashplate machine being such that at least one of the end cones (15) is slidably mounted in the casing (1) on a guide (18) such that during operation of the swashplate machine limited axial movement of at least the one cone (15) is possible whilst rotational movement of the cone (15) is prevented by the guide (18).

Abstract: Hand tool with an apparatus housing (2) in which the are movably mounted a rotary portion (8) and a reciprocating slide (10) non-rotatably but displaceably mounted in the housing, said slide serving as a holder for a tool (12). The rotary portion (8) has an oblique shaft (32) with a rolling bearing device (36) mounted thereon, which converts the rotation of the rotary portion into a reciprocating movement of the displaceable portion (10). The rolling bearing device (36) comprises one or two rolling bearings with outer ring surface areas, via which the bearing device is in direct driving contact with a driver element (52) at the end of the displaceably mounted slide (10). The driver element (52) is in direct engagement with the outer rings (48, 50) of the bearing device via opposite lateral surfaces (54, 56).

Abstract: A control system, method and apparatus are provided in which a rotatable wedge portion which is solidly mounted on a rotatable base engages piston and cylinder assemblies as the base rotates. The wedge is rotatable through various positions relative to the base, thus providing an adjustable tilt angle and different strokes for the pistons. In another embodiment, the single wedge is replaced by a double wedge assembly.

Abstract: In a variable displacement swash plate type compressor, there is employed a structure for stopping or minimizing a turning movement of a piston about its axis. The structure comprises a given part of the piston which is always out of the corresponding cylinder chamber; a turn stopper portion formed on the given part and including laterally opposed sides each having a rounded outer surface; and a cylindrical surface defined in a casing of the compressor at a portion which faces the turn stopper portion. The cylindrical surface is so arranged as to make a surface-to-surface contact with one of the laterally opposed sides when the piston is turned about its axis by a given angle.

Abstract: An improved axial-piston energy converting device is provided by utilizing a thin ceramic wear plate insert, having a typical thickness of only about 0.005 to 0.040 inches in thickness, as a cam surface secured by atmospheric pressure to an underlying support surface of a steel cam plate support structure. Attachment of the wear plate to the cam plate supporting surface is accomplished by polishing both a supporting surface of the cam plate, and a mating surface of the wear plate to a very smooth finish, and wiping a thin film of a fluid such as oil onto one of the polished surfaces prior to placing the wear plate onto the supporting surface. The highly polished, together with the light film of oil, result in a joint that is essentially air tight. Atmospheric pressure acting on the cam surface of the wear plate serves to hold the wear plate tightly in place on the support surface in the same manner that a pair of Johansson blocks are held together if their highly polished surfaces are mated.

Abstract: An axial piston machine has a rotary shaft, a first group of concentric radially spaced cylindrical bores, and a second group of concentric radially spaced cylindrical bores axially spaced from and aligned with said first group of cylindrical bores. A wobble plate is located between the groups of cylindrical bores and is positioned at an angle relative to the axis of rotation of the rotary shaft and is connected to said rotary shaft. A piston is located in each pair of cylindrical bores for reciprocal movement, and each piston includes two axially spaced piston segments and a bridge segment connecting the piston segments and attaching the piston segments to the wobble plate. Each bridge segment has a guide which is effective in the peripheral direction to contact a corresponding guide on adjacent bridge segments to prevent rotation of the pistons.

Abstract: A variable displacement type compressor having a rotary shaft, a swash plate with a through hole into which the rotary shaft is inserted for inclining movement of the swash plate, a lug plate mounted on the rotary shaft, a hinge mechanism between the lug plate and the swash plate for guiding the inclining movement of the swash plate. The displacement of the compressor varies by adjusting the inclined angle of the swash plate. The swash plate is connected through the hinge mechanism to the rotary shaft on two points and directly contacts the rotary shaft at a single contact point located on the inner periphery of the through hole.

Abstract: A piston for use in a reciprocating piston machine having a wobble plate has a first segment and a second segment axially spaced from and aligned with the first segment. A bridge segment connects the first and second piston segments for simultaneous reciprocal movement and at least one body is attached to the bridge segment to connect the piston to a wobble plate.

Abstract: A hydraulic piston engine driven by a lubricant-free, water-based pressure fluid, and comprising an enclosing housing and a piston-connected drive shaft supported by radial journal bearings in bearing bushings. One of the sliding surfaces of the radial journal bearing comprises a recess with a bearing-supporting hydrostatic pressure fluid pocket. The center of the recess is displaced by an angle (.alpha.) in the direction against the direction of rotation of the drive shaft, seen in relation to the geometrical, radial mean point in the high-load area for transmission of the piston forces to the bearing surface via the drive shaft. Hereby a particularly reliable piston motor of the type indicated is provided.

Abstract: A swashplate style pump uses a dual location cluster bearing of consistent configuration for use in each of two positions in the pump. In one location the dual location cluster bearing will interface with pistons and the swashplate cam. In a second location the dual position cluster bearing will interface with the non-camming side of the swashplate and the back plate of the pump. The dual position cluster bearing can be used in either and both positions with equal facility.

Abstract: In a swashplate style pump a cam follower that interfaces the pump pistons and the swashplate cam is a ring of material. This ring of material will be provided with a bearing surface and a piston contacting surface having the piston contacting surface provided with piston receiving elements.

Abstract: A hydraulic axial piston machine is disclosed, having a cylinder drum which is mounted for rotation relative to a housing (1), with a bearing (3) having a slide face (4) being arranged between the circumference of the cylinder drum and the housing (1). It is desired that such a machine shall be capable of operating also with fluids that are not such good lubricants as hydraulic oil. For that purpose the slide face (4) is formed by a friction-reducing plastics material and has at least one recess (5, 6, 7) communicating with at least one end edge of the slide face (4).

Abstract: A swash plate type compressor having a cylinder block with cylinder bores disposed parallel to the axis of the cylinder block. A rotary shaft rotatably mounted within the cylinder block carries an aluminum swash plate. The swash plate is fixed to the rotary shaft and has two facial surfaces and an end surface. The facial surfaces have a coating of between 0.0005 inches to 0.002 inches of a heat curable, cross-linked polyfluoro elastomer bonded directly to the aluminum, a lubricious additive and a load bearing additive. A piston reciprocally fitted within the cylinder bore contains shoes which slideably intervene between the piston and the swash plate facial surfaces and reciprocate the pistons by rotation of the swash plate. The coating on the swash plate permits the use of slow silicon alloy aluminum without the need of metal plating or high finish polishing.

Abstract: A swash plate type compressor including double headed pistons, a swash plate, and a drive shaft which is rotatably supported by radial bearings and thrust bearings. A boss on the swash plate has front and rear supporting seats and the cylinder block have front and rear supporting seats in a facing relationship with the front and rear supporting seats of the swash plate. One thrust bearing is rigidly arranged between the facing supporting seats. The other thrust bearing is held between the other facing supporting seats, with a belleville spring arranged between the thrust bearing and the supporting seat of the boss.

Abstract: The hinge unit K of a variable capacity swash plate type compressor has support arms protruded to the back side of a rotor on the rotating drive shaft, and guide pins, one end of which is fixed to a rotatable and wobbling swash plate. The support arms have guide holes (guide surfaces) which extend in a predetermined direction having an angle .alpha. with respect to an axis perpendicular to the axis of rotation of the drive shaft. Sections perpendicular to the center lines L.sub.1 of the guide holes are formed into at least a partial circle. A spherical elements of the guide pins are slidably and rotatably engaged with the guide holes of the support arms to be in line contact with the guide surface of the guide holes. The angle .alpha. is set so that the top clearance TC of the respective pistons at both maximum and minimum compression capacities of the compressor is equivalent.

Abstract: A wave cam 17 is rotatably supported by a drive shaft 13 in cylinder blocks 11, 12. Front and rear cam surfaces 17A, 17B of the wave cam 17 are defined by the surface of a predetermined imaginary cylindroid. Semi-spherical shoes 18, 19 are interposed between each cam surface 17A, 17B and each double-headed piston 16, which is accommodated in each cylinder bore 11a, 12a. Each shoe 18, 19 has a spherical surface 18a, 19a and a flat surface 18b, 19b. An imaginary circumference C0 corresponding to the arrangement of centers Q1, Q2 of the spherical surfaces 18a, 19a of the shoes 18, 19, respectively, is defined on each cam surface 17A, 17B. An imaginary circumference C1 corresponding to the arrangement of axes L1 of each cylinder bore 11a, 12a is also defined on each cam surface 17A, 17B. The center of both circumferences C0, C1 coincide with an axis L0 of the drive shaft 13. The radius R1 of the circumference C0 is larger than the radius of the circumference C1.

Abstract: A wobble yoke mechanism for converting reciprocating motion to rotary motion (or vice versa) in which each of two yokes (4) are connected to beams (3) by bearings (10, 10', 15, 15') having only one degree of freedom. The two yokes are 90.degree. out of phase. An eccentric bearing (15), also having only one degree of freedom, is fitted to or about the nutating shaft (16) and is connected to one end of each of the yokes (3). All the axes of the pairs of bearings pass through a central pivot point (5). The axes of the pistons need not be straight nor need they be parallel with the axis of the crankshaft (12).

Abstract: A variable displacement hydraulic piston machine that includes a shaft mounted for rotation within a housing, a plurality of pistons in a cylinder block coupled to the shaft, a yoke engaged by the pistons for controlling displacement of the pistons in the cylinder block, and saddle bearings pivotally mounting the yoke to a base within the housing. Each saddle bearing includes arcuate inner and outer bearing races fixed to the yoke and the housing base respectively, a plurality of rolling elements captured by a cage between the races, and a timing lever positioning and retaining the races and the cage with respect to each other. The timing lever has a central portion pivotally mounted to the bearing between the bearing races, and opposed end portions pivotally received in the housing base and yoke.

Abstract: A hydraulic piston machine is proposed, with a cylinder body (1), which comprises at least one cylinder (2) with a piston (3) movable therein, and a control counter-plate (7) which engages the cylinder body (1) by way of a contact surface (6) and, on relative movement between the cylinder body and the control counter-plate parallel to the contact surface, connects the cylinder in dependence upon its position with inlet and outlet channels (11, 12) respectively, the control counter-plate (7) and/or the cylinder body (1) being provided, at least in the region of the contact surface (6, 9), with a friction-reducing layer (13). A machine of that kind should be inexpensive to manufacture yet should operate reliably even when the hydraulic fluid has no or only slight lubricating properties. For that purpose the friction-reducing layer (13) is in the form of an injection-moulded part.

Abstract: A piston-type compressor has a compressor housing enclosing a crank chamber, suction chamber, and a discharge chamber. The compressor housing also includes a cylinder block having at least two cylinders. A single head-type piston is slidably disposed within each of the cylinders. A drive shaft is rotatably supported in the cylinder block. A plate is tiltably connected to the drive shaft. A bearing couples the plate to the pistons, so that the pistons are driven in a reciprocating motion within the cylinders upon rotation of the plate. A piston guiding mechanism has a first guiding device which is formed on the peripheral of the piston, and a second guiding device which is disposed within the housing for guiding the first guiding device to slide smoothly along the second guiding device and to prevent the piston from rotating around its axis or radially inclining when the piston reciprocates in the cylinder.

Abstract: A hydraulic machine with a piston and slider shoe unit (1) is disclosed, in which the piston (2) and the slider shoe (3) are joined to one another by way of a ball-and-socket joint (4) forming a first contact surface, and the slider shoe (3) lies via the intermediary of a second contact surface on a control surface (9), a friction-reducing layer being arranged on one contact surface. It is desirable for a hydraulic machine of the that kind to be capable of reliable operation even when using hydraulic fluids having only a operation even when using hydraulic fluids having only a poor or no lubricating effect at all, yet to be inexpensive to manufacture. For that purpose, the friction-reducing layer (11) is extended to at least one further contact surface.

Abstract: A hydraulic axial piston machine (1) is disclosed, having a cylinder drum (2) which is mounted rotatably in a housing and comprises at least one cylinder (3) which, on rotation of the cylinder drum (2), passes over control kidneys (15) in a control face. In order to be able to operate such a machine even with hydraulic fluid that has no or only slight lubricating properties, such as, for example, water, and in order to be able to manufacture the machine with few manufacturing steps, the control face is located on the rear flange (9) of the housing, and the control kidneys (15) are formed in a plastics material insert (10) which is arranged in the rear flange (9) of the machine (1).

Abstract: A compressor includes a drive shaft rotatably supported on cylinder block. A swash plate rotates in accordance with rotation of the drive shaft. A plurality of pistons reciprocate in the associated bores in the cylinder block in accordance with the rotation of the swash plate. First an second thrust bearings are provided in the cylinder block at both sides of the swash plate, and receive the axial loads applied to the swash plate and drive shaft according to the reciprocation of the pistons. The first thrust bearing has the first seat portion clamped at both sides by the swash plate and cylinder block and the second seat portion located apart from one of the swash plate and cylinder block.

Abstract: A variable displacement axial piston hydraulic unit (11) has a cradle surface (41) and a swashplate (35) with a convex surface (43). A roller bearing assembly (45) includes a bearing cage (49) defining a slot (53). Bearing clocking is accomplished by a link member (55) which is a rigid, unitarily formed member including several portions. A first portion (57) is pivotally mounted relative to the housing (13). A second portion (67) pivots and slides within an elongated slot (65) defined by the swashplate (35). A clocking portion (69) pivots and slides within the slot (53). The clocking arrangement of the present invention is simple and inexpensive, yet performs the clocking function in an extremely accurate manner.

Abstract: A hydraulic axial piston machine is disclosed, having an inclined plate (7), on which a slider shoe (9) of at least one piston slides on relative movement between a cylinder body (2) receiving the piston and the inclined plate (7), and a pressure plate (10) articulated on the cylinder body (2) and holding the slider shoe (9) in engagement with the inclined plate. It is desirable for such a machine also to be operable with a hydraulic fluid that has no lubricating properties. For that purpose, between the pressure plate (10) and the cylinder body (2) there is arranged a bearing element (18) with a bearing surface (19) of plastics material, which slides with low friction on a counterpart (15) made of metal lying against the bearing surface (19).

Abstract: A slanting plate arrangement in a hydraulic axial piston machine is disclosed, having a slanting plate and a pressure plate, between which at least one slider shoe of a piston axially movable in a cylinder body is held, the pressure plate being rotatably connected to the slanting plate by means of an axle element limiting axial movement of the pressure plate with respect to the slanting plate in at least one direction. It is desirable to be able to use such a slanting plate arrangement even when a hydraulic fluid that has no or only slight lubricating properties is used. For that purpose, in the region of contact between the axle element and the pressure plate and/or axle element and slanting plate, a material combination of a metal and a high-strength thermoplastic plastics material is provided.

Abstract: A speed-reducing apparatus of low mechanical noise is disclosed which includes a wobbling rotation plate. In the speed-reducing apparatus, a fixed plate and a wobbling rotation plate face each other at a rotation angle and a rotation phase difference and are gradually engaged together with an output shaft.

Abstract: The reciprocating saw has a motor driven assembly which operates in the nature of a wobble plate. One end of the assembly is connected to a spindle for reciprocating the same. The other end of the assembly is connected to a counterweight whereby the spindle and the counterweight are simultaneously reciprocated in opposite directions. The counterweight is generally U-shaped such that its center of gravity is located near the spindle.

Abstract: A rotary drive for swinging a heavy member between two extreme positions. The drive transmits a rotary force provided by a motor or similar device through a first rotatable shaft to a second rotatable shaft perpendicular to the first shaft and connected to the heavy member. The second shaft rotates in an oscillatory manner between the extreme positions in response to rotation of the first shaft. The member may thus be positioned at any suitable location in its travel by operating the motor unidirectionally. The first shaft rotates about a first axis of rotation and rotates an arm about a second axis of rotation that intersects the first axis at an angle between zero and 90 degrees non-inclusive. The arm is connected to a universal joint having three mutually perpendicular axes. The universal joint transmits forces from the arm to the second shaft.

Abstract: A variable capacity swash plate type compressor having a hinge unit having a support arm protruding from a back side of a rotor, and a guide pin having one end thereof fixed onto a rotatable swash plate. The support arm has guide holes or guide surfaces which are parallel with a plane passing through a central axis "O" of a drive shaft and the top dead center position of the swash plate, the holes extending in a direction in which the holes approach the drive shaft from the outer edge of the rotor. Sections taken so as to be perpendicular to the center lines of the holes (guide surfaces) can be circular. A spherical element interacting with the guide holes is arranged at the end of the guide pin away from the rotatable swash plate. Thus, the spherical element of the guide pin interacts with the guide holes so that the suction force, compressive reaction force and torque are sustained on a line.

Abstract: A hydraulic axial piston machine is disclosed, with a cylinder drum (2), which has at least one cylinder (3), in which a piston (6) is mounted so as to be axially displaceable, and with a control counter-plate (11 ) which, on rotation of the cylinder drum (2) and the control counter-plate (11 ) relative to one another, connects the cylinder (3) in dependence upon its position with a fluid inlet (14) and a fluid outlet (15). With a machine of that kind, it is desirable to improve balancing out of the forces necessary for effecting a seal between the cylinder drum (3) and the control counter-plate (11). For that purpose, between the cylinder drum (2) and the control counter-plate (11 ) there is arranged a pressure plate (17) which engages the cylinder drum (2) via the intermediary of a spring element (21), the pressure plate (17) having a through-opening (20) associated with the cylinder (3), which through-opening is connected to the cylinder (3) in a fluid-tight manner.

Abstract: A compressor has a swash plate supported on a drive shaft for an integral rotation. The swash plate is coupled to a plurality of pistons reciprocally moveable in a cylinder block to compress gas therein. Reaction force of the compressed gas applied to the piston and causing axial load acting on the swash plate and the drive shaft is buffered by buffer structure. The buffer structure comprises a first bearing interposed between a first surface of the swash plate and the cylinder block. The buffer structure has a second bearing interposed between a second surface of the swash plate and the cylinder block. One of the bearings is arranged to be flexibly deformable to absorb the axial load while the other bearing is arranged to be rigid to receive the axial load and transmit the axial load to the cylinder block.

Abstract: The disclosure is directed primarily to pairs of unique nutating gears which are used for restraining the rotation of the wobbler portion of the split swash-plates of both variable- and fixed-displacement hydraulic machines in which the pistons reciprocate in fixed cylinders. Each pair consists of an internal gear fixed to the housing and an external gear fixed to the outer circumferential surface of the wobbler. Using any one of four different tooth designs, the gears simultaneously share two centers of meshing engagement when nutating, and they do not interfere with the complex lemniscate motion of the wobbler. This wobbler mounting arrangement results in significant size and weight reductions which are further enhanced by sliding shoe bearing assemblies that carry the axial loads developed by the machine's reciprocating pistons. The hydraulic machine is also provided with a modular design that makes it possible to make significant changes in displacement size with minimal changes in machine structure.

Abstract: An improved CV joint type of torque restraint for the socket plate of a variable capacity piston compressor. The inner and outer races of the joint have straight ball tracks arrayed along over lapping conical surfaces, with four balls captured therebetween. The inner race is fixed stationary and solid to the cylinder block, while the outer race is fixed to the socket plate. There is no provision for the inner race to shift axially relative to the compressor housing. When the socket plate changes its basic angle relative to the compressor central axis, the balls simply shift within the ball tracks to compensate.

Abstract: A swash plate type compressor incorporating therein a swash plate having an annular rail raised from each flat face thereof for providing a sliding-contact surface being in contact with sliding-contact surface portions of respective shoes which constitute a rotation-to-reciprocation conversion unit arranged between the swash plate and double-headed pistons reciprocating axial cylinder bores of the compressor. The sliding-contact surfaces of respective shoes bulge outward and have a radius of curvature "R" in the range of 800 through 1600 millimeters which is smaller than that of the conventional shoes of a swash plate type compressor, so that relatively large wedge shaped gaps are formed between the respective shoes and the swash plate to thereby stably and constantly hold lubricating oil.

Abstract: Disclosed is a compressor having a plate rotatable about an axis of a rotary shaft and a piston connected to the plate. The plate causes the piston to reciprocate between a top dead center and a bottom dead center of its stroke in accordance with the rotation movement of the plate. Cam surfaces are provided on the plate for actuating the piston. The cam surfaces have first portions for driving the piston toward the top dead center, and second portions for driving the piston toward the bottom dead center. Transmission members are interposed between the piston and the cam surface for transmitting the rotational movement of the plate to the piston. The first and second portions cause the transmission members to follow on the cam surfaces. At lease one of the first and second portions are arranged to have a normal line extending obliquely to the axis of the rotary shaft for constant contact between the transmission members and the one of the portions.

Abstract: A revolving cam-type press includes a drive shaft supported by a crown and a middle plate, the drive shaft being adapted to be rotated by a drive device; a revolving cam fixedly mounted on the drive shaft; a fluctuating disk provided on an inclined surface of the revolving cam for converting a rotational output of the revolving cam into a reciprocal motion; sliders movably provided at an outer peripheral portion of the fluctuating disk for producing a pressing pressure; a plurality of fluctuation disk rotation-prevention pins extending through the fluctuating disk to be in parallel relationship to and in a concentric relationship to the drive shaft, the pins being fixedly secured at their one ends to a slider guide; and spherical bearings slidably mounted respectively on the other ends of the rotation prevention pins and engaged respectively in through holes formed through the fluctuating disk.