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Class Information
Number: 417/375
Name: Pumps > Motor driven > Fluid motor
Description: Apparatus in which the motor is of the type which includes a movable working member (e.g., piston, turbine runner, diaphragm, etc.) which is motivated by a fluid.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7600982 |
Compact helical compressor for mobile use in a vehicle |
Oct. 13, 2009 |
| 7600984 |
Hydraulic metering device |
Oct. 13, 2009 |
| 7527482 |
Method and apparatus for compressing a gas to a high pressure |
May. 5, 2009 |
| 7438537 |
Liquid additive injection pump with mixing chamber and one way valve |
Oct. 21, 2008 |
| 7201557 |
Rotary pressure exchanger |
Apr. 10, 2007 |
| 6732646 |
Pump inking unit |
May. 11, 2004 |
| 6655931 |
Peristaltic compressors suitable for relaxation-free compression of polarized gas |
Dec. 2, 2003 |
| 6540487 |
Pressure exchanger with an anti-cavitation pressure relief system in the end covers |
Apr. 1, 2003 |
| 6537039 |
Hydraulic drive portable air compressor system |
Mar. 25, 2003 |
| 6364633 |
Internally ported hydraulically actuated down-hole pump |
Apr. 2, 2002 |
| 6129525 |
Speed control for fluid powered diaphragm pumps |
Oct. 10, 2000 |
| 6099274 |
Pump to surface pump |
Aug. 8, 2000 |
| 6059546 |
Contractile actuated bellows pump |
May. 9, 2000 |
| 6029688 |
Water wheel for pumping chemical treatment into water stream |
Feb. 29, 2000 |
| 6004114 |
Hydraulic submersible pump for oil well production |
Dec. 21, 1999 |
| 5984646 |
Hydraulic motor for use with airless paint sprayer system |
Nov. 16, 1999 |
| 5827051 |
Regenerative hydraulic power transmission for down-hole pump |
Oct. 27, 1998 |
| 5807082 |
Automatic downhole pump assembly and method for operating the same |
Sep. 15, 1998 |
| 5651666 |
Deep-well fluid-extraction pump |
Jul. 29, 1997 |
| 5607289 |
Underwater excavation apparatus |
Mar. 4, 1997 |
| 5498141 |
Hygienic tank lorry pump and tank truck |
Mar. 12, 1996 |
| 5480291 |
Underwater excavation apparatus |
Jan. 2, 1996 |
| 5366353 |
Air valve with bleed feature to inhibit icing |
Nov. 22, 1994 |
| 5320500 |
Continuous mixing device, method and use in an installation for pumping a high viscosity fluid |
Jun. 14, 1994 |
| 5286175 |
Dye injection apparatus for a fuel terminal |
Feb. 15, 1994 |
| 5249645 |
Pressure fluid actuated lubricator |
Oct. 5, 1993 |
| 5220943 |
Internal pump assembly |
Jun. 22, 1993 |
| 5062770 |
Fluid pumping apparatus and system with leak detection and containment |
Nov. 5, 1991 |
| 4995304 |
Extendable cylinders of elastically variable length for use in a pump |
Feb. 26, 1991 |
| 4967703 |
Machine having rotary reciprocating piston |
Nov. 6, 1990 |
| 4955585 |
Hydraulically driven fan system for water cooling tower |
Sep. 11, 1990 |
| 4921408 |
Non-icing quiet air-operated pump |
May. 1, 1990 |
| 4784582 |
Fluid dispensing pump |
Nov. 15, 1988 |
| 4783961 |
Natural gas pressure differential energy recovery system |
Nov. 15, 1988 |
| 4743175 |
Reel assembly for dewatering apparatus |
May. 10, 1988 |
| RE32577 |
Fluid pumping device for use with a fluid pump |
Jan. 12, 1988 |
| 4556369 |
Bellows seal |
Dec. 3, 1985 |
| 4555221 |
Fluid pumping device for use with a fluid pump |
Nov. 26, 1985 |
| 4466779 |
Check valve with injector |
Aug. 21, 1984 |
| 4424008 |
Hermetic seal for compressors or the like |
Jan. 3, 1984 |
| 4165759 |
Delivering measured quantities of liquid into a fluid |
Aug. 28, 1979 |
| 4154185 |
Submersible apparatus for evacuating seawater from suction-type work-handling gripper members |
May. 15, 1979 |
| 4132505 |
Thermocompressor utilizing a free piston coasting between rebound chambers |
Jan. 2, 1979 |
| 4091471 |
Pump for an artificial heart |
May. 30, 1978 |
| RE29193 |
Fluid metering device |
Apr. 26, 1977 |
| 3977815 |
Portable apparatus for compressing gases such as air |
Aug. 31, 1976 |
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