| Patent Number |
Title Of Patent |
Date Issued |
| 5927176 |
Axial piston machine with transverse and rotary adjustment of the pivoting cradle |
July 27, 1999 |
| The invention relates to an axial piston machine of skew plate construction, the pistons (7, 8) of which are supported on a sliding surface (11), acting as a skew plate, of a cradle (12) pivotable about an axis (33). The pivoting angle of the cradle (12) can be adjusted by means of a |
| 5678462 |
Hydrostatic travelling drive |
October 21, 1997 |
| The invention relates to a hydrostatic travelling drive for a vehicle, having a primary-adjustable and secondary-adjustable hydrostatic driving gear, which comprises at least two hydraulic machines in the form of a hydraulic pump drivable by a drive motor of the vehicle and a hydraulic |
| 5473895 |
Hydrostatic travelling drive |
December 12, 1995 |
| The invention relates to a hydrostatic travelling drive for a vehicle, having a primary-adjustable and secondary-adjustable hydrostatic driving gear, which comprises at least two hydraulic machines in the form of a hydraulic pump drivable by a drive motor of the vehicle and a hydraulic |
| 5419130 |
Hydrostatic machine with drain oil discharge |
May 30, 1995 |
| A hydrostatic machine which includes a housing having an internal space accommodating a rotatably journaled driving mechanism, and wherein the portion of the internal space which is not occupied by the driving mechanism encompasses a drain oil chamber which receives the drain oil inc |
| 5333997 |
Device for the power control of at least two hydrostatic variable displacement pumps |
August 2, 1994 |
| The invention relates to a power control device for two variable displacement pumps, each with an adjusting device which can be acted upon by adjusting pressure, a power control valve associated therewith, which is acted upon by a first control pressure corresponding with the operating |
| 5216943 |
Piston for hydrostatic axial and radial piston machines and method for the manufacture thereof |
June 8, 1993 |
| A method of manufacturing a piston for hydrostatic axial and radial piston machines by non-machining forming, by filling a material that is in a substantially unresistant, formable state into a mold defining a piston outer contour which is closed on all sides, in which at least one s |
| 5101630 |
Braking valve arrangement for a hydrostatic drive |
April 7, 1992 |
| The invention relates to a braking valve arrangement for a hydrostatic drive operated in open circuit, in particular for vehicle drives, wherein a hydraulic pressure medium is supplied to the hydraulic motor from the hydraulic pump via a reversing directional control valve as desired |
| 5062267 |
Hydrostatic transmission containing an axial piston motor located in a recess of a valve control |
November 5, 1991 |
| To make possible a small, compact construction of a hydrostatic transmission comprising a housing containing a valve-controlled piston pump, in particular an axial piston pump, which includes a first drive part rotatably driven by a drive shaft and a stationary cylinder block with pi |
| 5048295 |
Hydrostatic transmission |
September 17, 1991 |
| In a hydrostatic transmission comprising a pump and a hydraulic motor arranged in a main line having low pressure and high pressure sections, wherein an oil drain line of the hydraulic motor is connected to the low pressure section of the main line, the housing of the hydraulic motor is |
| 5007332 |
Piston for piston machines |
April 16, 1991 |
| In a piston for piston machines comprising a hollow body, open at least at its free end, having an axial cavity in which there is a filler piece at least partly filling the latter and consisting of a material of lower specific gravity than the material of the piston, said filler piece be |
| 4939954 |
Drive system for machines and vehicles, with a hydraulic and mechanical transmission arranged th |
July 10, 1990 |
| A drive system for machines and vehicles with a hydraulic and mechanical transmission arranged thereafter having a driving motor and a control member which can continuously vary the speed of the motor. A hydraulic converter also controlled by a control member dependent upon the speed of |
| 4884475 |
Automotive drive system for machines and vehicles |
December 5, 1989 |
| An automotive drive system for machines and vehicles, comprising a driving motor the speed of which can be continuously varied by means of a control member and a converter having control means for controlling its output speed in dependence on a depression of the speed of the driving moto |
| 4880359 |
Summation power output regulating system for at least two hydrostatic transmissions |
November 14, 1989 |
| In a summation power output regulating system for first and second hydrostatic machines (3, 4), having a common drive and comprising at least two hydrostatic transmissions (1, 2), each of the machines (3, 4) having a hydraulic control device (7, 8), wherein the second machine (4) is |
| 4864822 |
Control device for a hydrostatic drive for at least two actuators |
September 12, 1989 |
| A control device for a hydrostatic drive for at least two actuators having a variable displacement pump whose adjusting device can be acted on as a function of the displacement and/or of the delivery pressure, wherein a control valve is associated with each actuator in its hydraulic supp |
| 4802336 |
Hydrostatic transmission having a control and regulating device for adjusting the driving torque |
February 7, 1989 |
| There is disclosed an hydrostatic transmission having a control and regulating device for adjusting the driving torque with superimposed output power limit regulation, the transmission comprising a drive unit comprising an hydraulic pump having a variable output, and an hydraulic mot |
| 4765228 |
Axial piston machine with a device for flushing the circuit |
August 23, 1988 |
| With the object of improving the flushing arrangement in an axial piston machine for use in a closed-circuit hydrostatic drive, having a control member (18) that controls the working cycle of the axial piston machine (1) and having a circuit flushing arrangement (31) that includes a |
| 4756156 |
Drive system with two hydrostatic gears |
July 12, 1988 |
| A drive system having two hydrostatic gears (1, 2) driven by a common driving motor or by a plurality of driving motors having a fixed speed ratio, each having a pump (5, 6) and a hydraulic motor (7, 8) and in which the delivery or intake volume setting of the pumps (5, 6) and/or the |
| 4722187 |
Speed regulation device for a hydrostatic drive unit |
February 2, 1988 |
| The invention relates to a speed regulating device for a hydrostatic drive unit comprising a pump of variable feed volume and a motor in a hydraulic circuit, wherein the pump is driven by a drive motor of variable speed, and there is provided a regulating valve which controls the loading |
| 4627238 |
Output control apparatus for a hydrostatic drive with delivery adjustment |
December 9, 1986 |
| An output control apparatus for a hydrostatic drive in open circuit is described which has a device for regulating the delivery of the hydraulic pump. In addition to conventional output control by way of an output valve, the arrangement of an additional control piston which acts on the |
| 4602554 |
Axial piston machine, more particularly axial piston pump of the inclined disc or skew axis type |
July 29, 1986 |
| The invention is concerned with an axial piston machine, preferably an axial piston pump of the inclined disc or skew axis type, with a cylinder (9) which rotates about an axis of rotation and in which, on a pitch circle, several pistons (8) are movably guided in piston bores (11) ex |
| 4576554 |
Swashplate axial piston pump |
March 18, 1986 |
| The invention relates to a swash plate axial piston pump having several pistons, the piston heads of which are held in contact with the swash plate by means of a retraction plate, and having a central pressure-regulating valve which is forced against a valve spring by the pressure in |
| 4571940 |
Control device for a hydrostatic gear driven by a drive engine |
February 25, 1986 |
| A control device for a hydrostatic gear driven by a drive engine, such as an internal combustion engine, with an auxiliary pump which is driven synchronously with the drive engine, to produce a control pressure which is adjustable via a control valve and which is dependent on the speed o |
| 4546692 |
Radial bearing for drive plate of inclined-axis type axial piston machine |
October 15, 1985 |
| An axial piston machine of the inclined axis type is operable as a pump or motor has a drive shaft, a drive plate rotatable with the drive shaft, a machine housing, a drum having cylindrical bores inclined to the axis of rotation of the drive plate, pistons reciprocally mounted in the bo |
| 4519413 |
Pressure averager |
May 28, 1985 |
| The invention relates to a pressure averager for providing an averaged working pressure from the operating pressures of at least two sources of pressure medium, there being provided to average the operating pressures a differential piston of which the number of step faces which face the |
| 4518321 |
Power regulation device for a hydraulic pump |
May 21, 1985 |
| A power regulation device for a hydraulic pump includes a slidable piston having a first end face with a first diameter and a second, opposite end face with a smaller diameter, the second end face being biased by operating fluid pressure from the hydraulic pump and the first end face |
| 4466338 |
Oblique-shaft axial piston machine having a follower plate for the cylinder drum |
August 21, 1984 |
| An axial piston machine of the oblique-shaft type is described. The transmission of torque between the drive disc and the cylinder drum of the machine is effected by direct propulsion of the cylinder drum by way of the piston elements traveling to and fro in cylinder bores of the cylinde |
| 4007662 |
Axial piston machine of oblique-axle construction with tiltable cylinder drum |
February 15, 1977 |
| An axial piston machine has a control mirror body with a cylinder drum adjustable in both directions from a middle position with zero speed stroke of the pistons. An orifice in a guide surface (which at a given time is connected with a suction duct and a pressure duct) is divided into |
| 3961563 |
Axial piston machine of the type having a tiltable cylinder block |
June 8, 1976 |
| An axial piston machine of the swashplate type has a movable valve plate at the piston end of the cylinder block, and displacement of the valve plate by a stroke control mechanism changes the tilt of the block. The valve plate has a front face subjected to the hydraulic end thrust of the |
| 3946561 |
Fluid pressure control devices |
March 30, 1976 |
| A control device for connection between a hydropump and a hydromotor of a hydraulic system, to provide a control pressure for regulating operation of the system, has a valve housing accommodating a displaceable valve member formed to provide a throttling passageway between an inlet and a |
| 3932993 |
Control apparatus for an adjustable hydraulic machine driven by an adjustable driving motor |
January 20, 1976 |
| Apparatus for adjusting a hydraulic machine driven by an adjustable driving motor comprises an adjustment motor which adjusts the machine in one sense under one fluid control input dependent upon actual driving motor speed and in an opposite sense under an opposing such input supplied at |
