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Class Information
Number: 60/447
Name: Power plants > Pressure fluid source and motor > Condition responsive control of pump or motor displacement > Control actuated by a servo-motor fed by a speed indicating auxiliary pump
Description: Apparatus in which the displacement controller of the motive fluid pump or motor is driven by an adjunctive fluid motor receiving its pressurized fluid from an adjunctive constant displacement pump, the output of which is directly proportional to its speed.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7458211 |
Hydraulic control system for heavy construction equipment |
Dec. 2, 2008 |
| 6651428 |
Hydraulic drive device |
Nov. 25, 2003 |
| 6422009 |
Pump capacity control device and valve device |
Jul. 23, 2002 |
| 6276134 |
Apparatus for controlling a plurality of hydraulic motors and a clutch |
Aug. 21, 2001 |
| 6226987 |
Travel drive apparatus for hydraulic drive work vehicles and control therefor |
May. 8, 2001 |
| 6192681 |
Hydraulic drive apparatus |
Feb. 27, 2001 |
| 6105367 |
Hydraulic drive system |
Aug. 22, 2000 |
| 5746056 |
Overspeed control for a hydrostatic transmission |
May. 5, 1998 |
| 5638678 |
Hydraulic drive system |
Jun. 17, 1997 |
| 5145324 |
RAM air turbine driving a variable displacement hydraulic pump |
Sep. 8, 1992 |
| 5121603 |
Device for pressure-regulated variable displacement motors with RPM-dependent set pressure compensation |
Jun. 16, 1992 |
| 5101628 |
Energy regenerative circuit in a hydraulic apparatus |
Apr. 7, 1992 |
| 4819429 |
Hydraulical drive system |
Apr. 11, 1989 |
| 4810171 |
Regulator for an adjustable hydrostatic machine |
Mar. 7, 1989 |
| 4745746 |
Power control for a hydrostatic transmission |
May. 24, 1988 |
| 4711616 |
Control apparatus for a variable displacement pump |
Dec. 8, 1987 |
| 4680931 |
Constant speed control for positive displacement variable stroke hydraulic motor |
Jul. 21, 1987 |
| 4649705 |
Composite hydraulic system |
Mar. 17, 1987 |
| 4621495 |
Synchronized mechanical-hydrostatic gearbox |
Nov. 11, 1986 |
| 4620417 |
Control device for a hydrostatic gear driven by a drive engine |
Nov. 4, 1986 |
| 4613286 |
Constant torque control system for a variable displacement pump or pumps |
Sep. 23, 1986 |
| 4596118 |
Hydrostatic self-regulating drive system |
Jun. 24, 1986 |
| 4566274 |
Control device for a hydrostatic drive |
Jan. 28, 1986 |
| 4561250 |
Hydraulic drive system having a plurality of prime movers |
Dec. 31, 1985 |
| 4559778 |
Control device for a hydrostatic transmission |
Dec. 24, 1985 |
| 4545201 |
Control arrangements for regulating the speed of a hydrostatic energy consumer |
Oct. 8, 1985 |
| 4531367 |
Control and regulating means for an adjustable hydrostatic unit |
Jul. 30, 1985 |
| 4527393 |
Control device for a hydrostatic transmission |
Jul. 9, 1985 |
| 4498847 |
Control system for variable displacement hydraulic pumps |
Feb. 12, 1985 |
| 4496289 |
Device for controlling and/or measuring operational parameters of an axial piston machine |
Jan. 29, 1985 |
| 4495766 |
Controls for hydrostatic systems |
Jan. 29, 1985 |
| 4480963 |
Pump swashplate control assist |
Nov. 6, 1984 |
| 4480438 |
Power transmission |
Nov. 6, 1984 |
| 4474104 |
Control system for variable displacement pumps and motors |
Oct. 2, 1984 |
| 4426195 |
Adjustable axial flow piston machines |
Jan. 17, 1984 |
| 4405287 |
Regulating devices for a plurality of pumps driven by a common source |
Sep. 20, 1983 |
| 4398869 |
Control means for variable displacement pump |
Aug. 16, 1983 |
| 4365473 |
Hydrostatic transmission having an overspeed control |
Dec. 28, 1982 |
| 4364230 |
Hydrostatic transmission overspeed prevention circuit |
Dec. 21, 1982 |
| 4359130 |
Hydraulic system for responsive splitting of engine power |
Nov. 16, 1982 |
| 4343150 |
Sequential preconditioning circuit for hydrostatic transmission |
Aug. 10, 1982 |
| 4341073 |
Control circuit for variable displacement pumps with override valve |
Jul. 27, 1982 |
| 4248573 |
Hydraulic control system for variable displacement pump |
Feb. 3, 1981 |
| 4248574 |
Hydraulic control system for variable displacement pumps |
Feb. 3, 1981 |
| 4216656 |
High-efficiency hydrostatic vehicular drive system |
Aug. 12, 1980 |
| 4203712 |
Single or plural variable displacement pump control with an improved flow metering valve |
May. 20, 1980 |
| 4194362 |
Control system for a hydrostatic drive |
Mar. 25, 1980 |
| 4168612 |
Automatic control system for a hydrostatic transmission |
Sep. 25, 1979 |
| 4158529 |
Control device for a pumping arrangement |
Jun. 19, 1979 |
| 4149380 |
Control system for hydrostatic transmissions |
Apr. 17, 1979 |
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