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Class Information
Number: 60/474
Name: Power plants > Pressure fluid source and motor > Pump means moves motive fluid from one chamber to an opposite chamber of opposed expansible chambers having a common output > Valve or restriction controls gravity or spring return of output
Description: Apparatus in which the pump moves the piston in one direction only, its return being produced by gravity or stored energy and controlled by a valve or restriction means adjusting the rate of flow of motive fluid between the chambers.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7444808 |
Hydraulic system |
Nov. 4, 2008 |
| 6715282 |
Actuator device, in particular for operating the stand of motorcycles, and automatically releasable hydraulic valve |
Apr. 6, 2004 |
| 6679054 |
Electro-hydraulic actuator of a motorcycle stand |
Jan. 20, 2004 |
| 6454033 |
Electro-hydraulic vehicle with energy regeneration |
Sep. 24, 2002 |
| 5749224 |
Extended range thruster system and method of determining thrust |
May. 12, 1998 |
| 5375418 |
Controlled convertible top hydraulic lock |
Dec. 27, 1994 |
| 5291918 |
Safety valve actuator assembly |
Mar. 8, 1994 |
| 5251445 |
Hand operated hydraulic pump having pressurized reservoir within piston |
Oct. 12, 1993 |
| 5107678 |
Floating fluid-operated actuator |
Apr. 28, 1992 |
| 5070900 |
Safety valve actuator assembly |
Dec. 10, 1991 |
| 5065664 |
Control circuit for a cylinder allowing flow between an upper and a lower chamber |
Nov. 19, 1991 |
| 4642986 |
Hydraulic servo motor |
Feb. 17, 1987 |
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