Abstract: The present invention concerns an axial piston pump (1, 1?, 1?,1??) for the pumping of a liquid comprising: a head (20) in which there is at least partially made a plurality of cylinders (25) in a number greater than three, with central axes parallel between them, a plurality of pistons (75) each of which slide in a respective cylinder (25) of the plurality of cylinders (25) for the pumping of the liquid, and a suction channel of the liquid to pump, which is equipped with a primary duct (140) and a plurality of branch ducts (145, 145?,145?), each of said branch ducts (145, 145?,145?) being adapted to place the primary duct (140) in fluid communication with a respective cylinder (25) of the plurality of cylinders (25), in which the primary duct (140) is positioned between the central axes of the cylinders (25).

Abstract: Disclosed herein is an electric power and thermal management system in which, when a shaft is rotated due to an operation of a power part, generation of electric power and a circulation of a fluid are performed together so that the generation of the electric power and a circulation structure of oil are integrated, and thus a layout can be reduced, and a structure can be simplified. In addition, in a state in which the generation of the electric power and the circulation structure of the oil are integrated, a circulation amount of the oil is adjusted according to an angle of an inclined plate constituting a pumping mechanism so that an oversupply of the oil to parts through which the oil is circulated can be prevented.

Abstract: An oil dispersion system uses an actuator for propellers and includes a pumping device that circulates oil when a driving motor is operated to drive a propeller, whereby the propeller and an oil circulation structure are integrated, and a circulation amount of oil is adjusted based on an angle of a swash plate of the pumping device when the driving motor is operated in order to drive the propeller, thereby controlling a supply of oil to no more than that required by oil-using parts.

Abstract: A hydrostatic axial piston machine has a drive shaft penetrating a housing on either side. In this case, the mechanically weaker of the two shaft ends is strengthened by an undercut being eliminated, said undercut defining the minimum diameter of the shaft end and thus of the entire drive shaft. Instead, the strength of the relevant shaft end is increased by a displacement of a circular bearing surface for a rolling bearing radially outwardly and away from the rolling bearing. In this case, the circular bearing surface is displaced below a compression spring which clamps the cylinder drum against a distributor plate. The resulting spacing between the circular bearing surface and the rolling bearing remaining in place is bridged by a sleeve or by a ring. A concave rounded shaft shoulder is simply formed below the sleeve and/or the ring.

Abstract: Hydraulic axial piston unit (1) of the swashplate construction type having a drive shaft (2) adapted to drive or be driven by a cylinder block (4). The cylinder block comprises a plurality of cylinder bores (6), in which several pistons (8) are moveable in general along the rotational axis (10) of the drive shaft (2) and relative to the cylinder bores (6). First ends of the pistons (8) protrude outside of the cylinder bores (6) and are slidable fixed by means of slippers (14) to a swashplate (16). The slippers (14) are hold down in a sliding manner on a sliding surface (18) of the swashplate (16) by means of a slipper hold down ring (20) arranged parallel to the sliding surface (18).

Abstract: The invention concerns a hydraulic piston machine, in particular a water hydraulic machine, with at least one cylinder, in which a piston (4) is arranged to reciprocate, the piston (4) comprising a hollow that is surrounded by an annular wall and has one open end. It is endeavoured to keep cavitations small. For this purpose, a filling member (13) is arranged in the hollow (12), the filling member (13) having at least a radial projection (22) and the annular wall (16) having at least a radial depression (17) in the inside facing the hollow (12), or the annular wall (16) having a radial projection and the filing member (13) having a radial depression, the depression having a restraint (19), at least at the end adjacent to the open end (18) of the hollow (12), and the projection (22) and the depression (17) engaging each other.

Abstract: A barrel-type internal combustion engine includes a power output shaft assembly with a sliding joint. A power output shaft has a pair of spaced apart bearing surfaces and a plurality of radial splines between the bearing surfaces. A cam plate has a central hub and a cam track extending therefrom. The central hub has a longitudinal bore for receiving the shaft. The bore has a pair of spaced apart bearing surfaces and a plurality of radial splines between the bearing surfaces. When assembled, the power shaft is received in the bore of the hub, the bearing surfaces are generally aligned and the splines engage such that the shaft and cam plate are coupled for rotation about the rotational axis of the shaft and the cam plate is longitudinally slidable on the shaft.

Abstract: A pump apparatus includes an outer cylindrical housing having end plates, and a power conversion assembly supported for rotation within the outer housing. A torque input shaft provided on one of the end plates has a "primary" gear on its free end. The inner housing includes a crank case within which cylinders are arranged at spaced radial locations. Double-acting pistons are housed within the cylinders. Crank members supported by the crank case for rotation are coupled to the pistons via force transmitting elements to drive the pistons with reciprocating motion in the cylinders. Each of the crank members includes a "secondary" gear engaged with the primary gear. Each crank member includes a linkage coupled with a piston rod so that the pistons are driven in reciprocating motion in the cylinders.

Abstract: A bent-axis hydraulic apparatus having a case in which a rotatable cylinder block is positioned and which is associated with a rotatable shaft at a drive angle therebetween. A split angle spline drive interconnects the cylinder block of the hydraulic axial piston unit with a rotatable shaft for transmission of torque therebetween without any side loading on the pistons of the axial piston unit. The split angle spline drive has two series of external teeth associated one with the cylinder block and the other with the rotatable shaft which individually mesh at two locations opposite the axis of rotation thereof with two spaced-apart sets of internal teeth on a ring gear that is rotatably-mounted in fixed location within the case of the hydraulic apparatus. The tooth mesh center lines are equally spaced from the pivot point for the cylinder block and the rotatable shaft to achieve synchronization.

Abstract: A bent axis type axial piston pump or motor wherein the cylinder block is rotatable in synchronizm with the torque plate about an axis inclined relative to the axis of rotation of the torque plate. The shaft of the torque plate passes through the inclined cylinder block without mutual mechanical interference and is supported by bearings at the opposite sides of the casing. The torque plate and the cylinder block are connected by a mechanism which ensures exact synchronization of rotation of the two members. A static pressure balance is established between the working fluid acting on the opposite sides of the torque plate, the cylinder block and the pistons, respectively. The angle of inclination of the cylinder block with respect to the shaft can be changed thereby to change the capacity of the pump or motor. The pump or motor of this invention may be provided in a tandem type.

Abstract: A piston machine, particularly a radial piston machine which includes a pintle supporting a rotor which has a plurality of radially extending bores in which radial pistons are guided. These bores are in communication with control chambers formed in the pintle. One of the chambers is a high-pressure chamber and the other is a low-pressure chamber. Pre-control grooves and additional passages are provided at the control chambers to prevent, during the operation of the radial piston machine the occurrence of pressure shocks at the inner and outer dead centers.

Abstract: The invention relates to an axial piston machine having an oblique disk body (14) arranged in a housing (1) in a torsionally secure manner, having a drive shaft (4), which is mounted in the oblique disk body (14), and having a rotatable cylinder drum (7), which is coupled with the drive shaft (4) and in which a plurality of pistons (9) may be displaced axially in piston bore holes, their piston heads (11) being supported by means of sliding shoes (12) against the oblique surface (13) of the oblique disk body (14). The purpose of the invention is to construct the axial piston machine in such a way as to make possible torsional securement of the oblique disk body (14) which is simple in terms of production techniques and assembly, with a compact constructional form. This is achieved by mounting the oblique disk body (14) with its peripheral surface (16, 17) torsionally secured in a form-locking manner in a recess (19) of the housing (1) shaped to correspond to the peripheral surface (16, 17).

Abstract: A hydraulic transmission device operable to translate hydraulic energy into mechanical energy and vice versa. The device has a housing 14 having a close end portion and an open end portion in the longitudinal direction. The housing supports therein a drive shaft 11, a retainer 12, and a cylinder block 13 which have an integral structure. A recess is formed at a substantially central location of the end surface of the cylinder block 13 that is on the side of an open end of the housing, and a cover 15 closing the open end of the housing has a protruding portion 15A which extends through a port plate 23 to be engaged with the recess of the cylinder block through a bearing 17. A plurality of pistons are disposed in the cylinder block and are kept in tight engagement with a swash plate fixed to the closed end portion of the housing at a constant tilt angle. The device acts as either a swash plate type axial piston pump or motor of this type as the drive shaft rotates.

Abstract: A swash plate plunger type pump-motor comprises a casing, a rotatable cylinder block formed with chambers, a plurality of plungers axially slideably received in the chambers, rotatable swash plate rotatably supported through a bearing within the casing, a plunger retainer adapted to prevent the plungers from disengaging from the swash plate, and a rotational shaft on which the cylinder block is fixedly mounted. The plunger retainer and the swash plate are connected with each other in such a manner that the front faces of the plunger head portions contact the swash plate and that the rear faces of the plunger head portions contact the plunger retainer. The rotational axis of the swash plate is inclined at a predetermined angle with respect to the rotational axis of the rotational shaft.

Abstract: In an axial piston motor or pump the cylinder barrel is mounted on a medial shaft which has a shoulder which axially, bears against the front end of the rotor barrel. The rear end of the medial shaft is radially borne in a housing portion. The front portion of the medial shaft is provided with a bearing member of an axial thrust bearing for support on a respective axial thrust bearing member in the housing. On the rear end of the rotary barrel an axially selfthrusting control body is provided to seal the flow of fluid to and from the cylinders of the rotary barrel. The control body presses against the rotary barrel, the rotary barrel presses against the shoulder of the medial shaft and the thrust bearing member of the shaft bears on the thrust bearing member of the housing. As a result thereof the cylinders in the rotary barrel can be straight through bores. The manufacturing of the rotor barrel is thereby simplified and the flow acceleration losses of former bag bore type cylinders are prevented.

Abstract: A fluid machine comprises a cylinder block mounted on a rotary shaft, a rotary plate an axis of which is intersecting with an axis of the rotary shaft by an acute angle, a gear engaging mechanism for engaging the rotary plate with the rotary shaft to cyclically rotate the same, a piston supported by the rotary plate and inserted into a throughhole provided in the cylinder block a suction system and a delivery system for effecting suction and delivery operation by a rotation of the cylinder block and the piston, a spherical contact portion disposed between the rotary plate and the rotary shaft and adapted to receive thrust generated between the same, and a passage for leading to the spherical contact portion a high-pressure working gas including lubricating oil generated in the delivery system.

Abstract: A lubricant chamber encloses the sliding contact portions of a slant plate and the plurality of shoes to confine lubricating oil therein. The lubricating oil is permitted to leak from the chamber at a rate greater than the rate of flow of oil from the pressure pockets formed on the sliding faces of the shoes.

Abstract: Driving device of a rotating cylinder block (8) of a pump or hydraulic motor whose axis is inclined along an angle that is fixed or that can be adjusted in relation to the axis of rotation XX' of the drive shaft (1) and in which the transmission of the rotation torque from the drive shaft (1) to the cylinder block (8) (pump) and from the cylinder block (8) to the drive shaft (1) (motor) is performed by pistons (5) mounted by connecting ball joints (6) to a pulse plate (4) fixed in rotation with the drive shaft (1). The face (8a) of the cylinder block (8) turned toward the pulse plate (4) carries pairs of diametrically opposed projections (10) located at the entrance of the bores (7) of the cylinder block in which the pistons (5) move, which projections exhibit a concave surface (11) in contact with a surface of the ball joints (6) for connecting the pistons with the pulse plate (4). Applications is to motors and pumps having rotating cylinder blocks.

Abstract: A ball-jointed bearing arrangement of the piston heads in an axial piston machine within a drive flange wherein a bearing member formed of a material with good antifriction properties for receiving a piston head is seated in a recess of the drive flange whereby all bearing members are covered by a covering plate which is detachably fastened to the drive flange. The bearing member is formed of a spherically indented cup of a flat material, such as sheet metal, which is inserted into the respective recess, which recesses conform in shape, pitch circle and distribution to the piston heads, however, are constructed in conformance with the thickness of the respective spherical dished cup deeper and larger in diameter, and in which the covering plate is traversed by the piston heads and is fastened on the side of the drive flange towards the piston heads.

Abstract: A two-stage rotary compressor makes use of a piston-vane arrangement where both stages are built side-by-side and where the same members (piston-vanes) work for both stages, the "axial pistons" of the second stage becoming the dividing "vanes" in the first stage.

Abstract: A slant plate type hydraulic device is provided which comprises a frame, a cylinder rotatable mounted in the frame and a plurality of plunger means which are slidably fitted into the cylinder. The plunger means are positioned in a circular pattern around the axis of the cylinder. A holder means is provided, along with a slant plate means wherein the holder means holds the slant plate means such that the slant plate means and cylinder are rotatable with respect to one another. Also included is a plurality of shoe means, with each shoe means being universally, rotatably mounted on one of the plunger means, wherein the shoe means are in sliding contact with the slant plate means. Finally, biasing means are provided for holding the shoe means in contact with the plate means.

Abstract: An improved fluid energy translating device of the axial piston type includes a cylinder barrel mounted on a drive shaft. The cylinder barrel is rotatably coupled to the drive shaft through a splined connection which includes crowned male splines on the drive shaft and female splines within the cylinder barrel. A port plate having inlet and outlet passages abuts one end of the barrel and intimate contact therebetween is maintained by a plurality of disk or Belleville springs operably disposed between the drive shaft and the cylinder barrel.

Abstract: A rotary piston pump of the axial type with fixed cylinders wherein a flywheel of rotary drum shape is anchored to a driving shaft (1) coaxially, on the circular side of said wheel being engraved one continuous oblique groove which takes the form of one cycle sine curve on the development view of the circular side, while outer ends of piston rods of pistons in the cylinders are connected with the oblique groove. The pistons or plungers thus repeat reciprocation with rotation of the driving shaft.According to the present invention, an apparatus of large scale having relatively few sliding faces in its parts may be designed. Further, according to the present apparatus, besides oil, the operating fluids of low lubricity, e.g., water and the like, may also be used.

Abstract: A machine of the axial piston pump type used as a pump or motor including a cylinder drum mounted rotatably in a casing. Working pistons are included in the drum in working cylinders and driven as the drum rotates. The casing terminates in a tubular duct coaxial therewith that defines one of the suction and pressure openings of the machine. The tubular duct is of a diameter generally the same as that of the drum to provide for the direct flow of fluid medium to the working cylinders without undergoing a change in the direction of flow. The tubular duct terminates in a first connecting flange, and a second duct defines the other of the suction and pressure openings and terminates in a second connecting flange that extends to the side of the tubular duct.

Abstract: A swash plate type compressor to provide reciprocation of cylindrical guide members arranged around a driving shaft axis and a corresponding number of pistons respectively connected to the cylindrical guide members with lubricating means arranged in compartments to prevent leakage of lubricant to the pistons.

Abstract: In a hydraulic axial piston machine, which may be a pump or hydraulic motor, whose cylinders are located on a larger circle than the cylinder ports and the stationary high pressure and low pressure ports of a stationary body, a tilting moment is exerted on the cylinder block which is compensated by radial pressure exerted on the cylinder block by positioning cylinder and piston members operated either directly by high pressure fluid from the high pressure conduit of the stationary body, or indirectly under the control of a valve operated by leakage fluid obtained from a recess in the control face of the stationary body.