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Class Information
Number: 60/430
Name: Power plants > Pressure fluid source and motor > Having condition responsive control in a system of separately operable power input pumps, pump motors, pump cylinders or pressure fluid sources > Pressure or volume responsive means shifts the relationship
Description: Apparatus in which the relationship of the plural pump or source means to each other is changed by a means sensing a change in pressure or volume in a part of the apparatus.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7546730 |
Hydraulic vehicle stabilizer system with two-stage bi-rotational hydraulic pump system |
Jun. 16, 2009 |
| 7506506 |
Multi-purpose hydraulic system |
Mar. 24, 2009 |
| 7499783 |
Hydraulic control apparatus for hydraulic excavator |
Mar. 3, 2009 |
| 7493757 |
Hydraulic pressure supply unit |
Feb. 24, 2009 |
| 7415820 |
Hybrid powertrain with valve assembly for dual pumps |
Aug. 26, 2008 |
| 7401465 |
Dual pump dual pressure hydraulic circuit |
Jul. 22, 2008 |
| 7389640 |
Hydraulic system and automatic transmission |
Jun. 24, 2008 |
| 7281373 |
Fluid pump control device for wheel loaders |
Oct. 16, 2007 |
| 7251934 |
Work vehicle hydraulic system |
Aug. 7, 2007 |
| 7178333 |
Hydraulic control system for hydraulic excavator |
Feb. 20, 2007 |
| 7168245 |
Work machine with supplemental power steering |
Jan. 30, 2007 |
| 7165396 |
Pump control override for tandem pumps |
Jan. 23, 2007 |
| 7069722 |
Hydraulic system for a vehicle, a vehicle including such a hydraulic system and a suplementary unit for such a vehicle |
Jul. 4, 2006 |
| 6959545 |
Engine control based on flow rate and pressure for hydraulic hybrid vehicle |
Nov. 1, 2005 |
| 6907728 |
Load sensing hydraulic system |
Jun. 21, 2005 |
| 6901754 |
Power conserving hydraulic pump bypass compensator circuit |
Jun. 7, 2005 |
| 6823669 |
Transfer valve system |
Nov. 30, 2004 |
| 6810663 |
Fluid pressure circuit control system |
Nov. 2, 2004 |
| 6708490 |
Hydraulic system for construction machine |
Mar. 23, 2004 |
| 6619037 |
Hydraulic driving device of civil engineering and construction machinery |
Sep. 16, 2003 |
| 6594992 |
Punch press hydraulic servo device using a rotary valve |
Jul. 22, 2003 |
| 6460655 |
Vehicle hydraulic system |
Oct. 8, 2002 |
| 6357231 |
Hydraulic pump circuit for mini excavators |
Mar. 19, 2002 |
| 6321152 |
System and method for inhibiting saturation of a hydraulic valve assembly |
Nov. 20, 2001 |
| 6250894 |
Load sharing valve and system for operating centrifugal pumps in parallel |
Jun. 26, 2001 |
| 6244048 |
Hydraulique drive device |
Jun. 12, 2001 |
| 6170261 |
Hydraulic fluid supply system |
Jan. 9, 2001 |
| 6148548 |
Construction machine |
Nov. 21, 2000 |
| 6109030 |
Apparatus and method for ganging multiple open circuit pumps |
Aug. 29, 2000 |
| 5971319 |
System for converting jet aircraft to parabolic flight operation |
Oct. 26, 1999 |
| 5944492 |
Hydraulic pump control system |
Aug. 31, 1999 |
| 5941786 |
Continuously variable transmission with at least two pumps connected in series/parallel |
Aug. 24, 1999 |
| 5937646 |
Hydraulic charge boost system for a gantry crane |
Aug. 17, 1999 |
| 5865086 |
Thermo-hydro-dynamic system |
Feb. 2, 1999 |
| 5852934 |
Fluid joining device for power construction vehicles |
Dec. 29, 1998 |
| 5829252 |
Hydraulic system having tandem hydraulic function |
Nov. 3, 1998 |
| 5829251 |
Hydraulic control circuit for working components, in particular in earth-moving machines |
Nov. 3, 1998 |
| 5692377 |
Apparatus for controlling lifting operation |
Dec. 2, 1997 |
| 5673557 |
Displacement control system for variable displacement type hydraulic pump |
Oct. 7, 1997 |
| 5540050 |
Hydraulic system providing a positive actuator force |
Jul. 30, 1996 |
| 5261232 |
Valve system for supplying fluid from a pair of fluid pressure sources to a load |
Nov. 16, 1993 |
| 5226289 |
Control system for automatically regulating the displacement setting of a plurality of hydrostatic pumps |
Jul. 13, 1993 |
| 5201174 |
Auxiliary hydraulic pump system |
Apr. 13, 1993 |
| 5179836 |
Hydraulic system for a differential piston type cylinder |
Jan. 19, 1993 |
| 5167121 |
Proportional hydraulic control |
Dec. 1, 1992 |
| 5148676 |
Confluence valve circuit of a hydraulic excavator |
Sep. 22, 1992 |
| 5127227 |
Hydraulic circuit apparatus for construction vehicles |
Jul. 7, 1992 |
| 5083428 |
Fluid control system for power shovel |
Jan. 28, 1992 |
| 5081837 |
Hydraulic control circuit |
Jan. 21, 1992 |
| 5074495 |
Load-adaptive hybrid actuator system and method for actuating control surfaces |
Dec. 24, 1991 |
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