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Class Information
Number: 417/216
Name: Pumps > Condition responsive control of drive transmission or pump displacement > Plural pumps with individual or relative control
Description: Apparatus comprising a plurality of pumping units wherein the control means effects a change in the operating characteristics of one unit relative to another.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7597547 |
Variable capacity rotary compressor |
Oct. 6, 2009 |
| 6997685 |
Hydraulic system comprising a main pump and a precompression pump |
Feb. 14, 2006 |
| 6913447 |
Metering pump with varying piston cylinders, and with independently adjustable piston strokes |
Jul. 5, 2005 |
| 6846165 |
Hydrostatic machine |
Jan. 25, 2005 |
| 6790013 |
Variable displacement vane pump with variable target regulator |
Sep. 14, 2004 |
| 6783331 |
System and method of multiple-phase pumping |
Aug. 31, 2004 |
| 6763808 |
Fuel pump and fuel feeding device using the fuel pump |
Jul. 20, 2004 |
| 6579070 |
Pump assembly comprising two hydraulic pumps |
Jun. 17, 2003 |
| 6575709 |
Pumps |
Jun. 10, 2003 |
| 6498973 |
Flow control for electro-hydraulic systems |
Dec. 24, 2002 |
| 6453585 |
Hydraulic drive device of working machine |
Sep. 24, 2002 |
| 6364623 |
Bubble detection and recovery in a liquid pumping system |
Apr. 2, 2002 |
| RE37553 |
Bubble detection and recovery in a liquid pumping system |
Feb. 19, 2002 |
| 6299766 |
Reverse osmosis filtering apparatus with concentrate dilution |
Oct. 9, 2001 |
| 6287083 |
Compressed air production facility |
Sep. 11, 2001 |
| 6162023 |
Reciprocating cam actuation mechanism for a pump |
Dec. 19, 2000 |
| 6126404 |
Apparatus for the metered delivery of fluids |
Oct. 3, 2000 |
| 6106238 |
Bubble detection and recovery in a liquid pumping system |
Aug. 22, 2000 |
| 6048177 |
Output regulation with load sensing |
Apr. 11, 2000 |
| 6030185 |
Radial piston pump |
Feb. 29, 2000 |
| 5913663 |
Device for regulating the total power of at least two variable displacement hydrostatic pumps |
Jun. 22, 1999 |
| 5823747 |
Bubble detection and recovery in a liquid pumping system |
Oct. 20, 1998 |
| 5527156 |
Apparatus for and method of controlling engine and pumps of hydraulic construction equipment |
Jun. 18, 1996 |
| 5482441 |
Liquid flow control system |
Jan. 9, 1996 |
| 5333997 |
Device for the power control of at least two hydrostatic variable displacement pumps |
Aug. 2, 1994 |
| 5290153 |
Two stage pump assembly |
Mar. 1, 1994 |
| 5201174 |
Auxiliary hydraulic pump system |
Apr. 13, 1993 |
| 5186612 |
Variable pressure inlet system for hydraulic pumps |
Feb. 16, 1993 |
| 5176504 |
Apparatus for controlling hydraulic pumps for construction machine |
Jan. 5, 1993 |
| 5165862 |
Loading machine equipped with a first and a second pump supplying pressure oil to at least one hydraulically driven working component, such as a hydraulic piston-cylinder device or hydraulic m |
Nov. 24, 1992 |
| 5046926 |
Control device for a variable displacement hydrostatic machine |
Sep. 10, 1991 |
| 5022231 |
Pump optimization |
Jun. 11, 1991 |
| 5007805 |
Reversible variable displacement hydraulic device |
Apr. 16, 1991 |
| 4943212 |
Means for feeding fluid into a pressure conduit |
Jul. 24, 1990 |
| 4880359 |
Summation power output regulating system for at least two hydrostatic transmissions |
Nov. 14, 1989 |
| 4846046 |
Hydraulic drive circuit system |
Jul. 11, 1989 |
| 4830589 |
Variable stroke positive displacement pump |
May. 16, 1989 |
| 4809504 |
Control system for controlling input power to variable displacement hydraulic pumps of a hydraulic system |
Mar. 7, 1989 |
| 4773369 |
Method of controlling an output of an internal combustion engine and/or a variable displacement hydraulic pump driven by the engine |
Sep. 27, 1988 |
| 4763473 |
Arrangement for operating a diesel hydraulic drive |
Aug. 16, 1988 |
| 4750866 |
Control device for a pump with adjustable flow |
Jun. 14, 1988 |
| 4745746 |
Power control for a hydrostatic transmission |
May. 24, 1988 |
| 4729717 |
Power transmission |
Mar. 8, 1988 |
| 4711616 |
Control apparatus for a variable displacement pump |
Dec. 8, 1987 |
| 4689955 |
Vibration roller having a power limiting device |
Sep. 1, 1987 |
| 4639195 |
Power control devices for hydrostatic pumps |
Jan. 27, 1987 |
| 4637781 |
Torque regulating system for fluid operated pump displacement control systems |
Jan. 20, 1987 |
| 4613285 |
Piston stroke control device for free piston type oscillating compressors |
Sep. 23, 1986 |
| 4613286 |
Constant torque control system for a variable displacement pump or pumps |
Sep. 23, 1986 |
| 4600364 |
Fluid operated pump displacement control system |
Jul. 15, 1986 |
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