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Class Information
Number: 251/336
Name: Valves and valve actuation > Biased valve
Description: Subject matter wherein the valve has one position which it will maintain under the influence of a spring or weight which comprises a biasing means, and force must be applied to the valve in order to have it take a different position.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7461515 |
Sequential hot gas defrost method and apparatus |
Dec. 9, 2008 |
| 7037303 |
Urinary flow control valve |
May. 2, 2006 |
| 6957703 |
Closure mechanism with integrated actuator for subsurface valves |
Oct. 25, 2005 |
| 6902704 |
Injection pump assembly for a combinatorial reactor and related method |
Jun. 7, 2005 |
| 6802295 |
Air intake shutoff device with connecting linkage |
Oct. 12, 2004 |
| 6739577 |
Fluid coupling system |
May. 25, 2004 |
| 6499719 |
Fluid coupling system |
Dec. 31, 2002 |
| 6375158 |
Fastening device for connecting a valve spring retainer to a valve stem |
Apr. 23, 2002 |
| 6279599 |
Air hose assembly for a portable tire pump and having the dual functions of air inflation and pressure release |
Aug. 28, 2001 |
| 6219861 |
Drain structure for a sink |
Apr. 24, 2001 |
| 6119723 |
Apparatus for varying the flow area of a conduit |
Sep. 19, 2000 |
| 5996551 |
Spring assembly in an engine air throttle control providing rotational blocking when relaxed |
Dec. 7, 1999 |
| 5913505 |
Movement-transmission apparatus using a pivoting lever and valve incorporating said apparatus |
Jun. 22, 1999 |
| 5558117 |
Pneumatic valve assembly with dynamic annular seal flange |
Sep. 24, 1996 |
| 5358216 |
Foot-operated valve |
Oct. 25, 1994 |
| 5215522 |
Single use medical aspirating device and method |
Jun. 1, 1993 |
| 5048489 |
Hydraulically operated valve with controlled lift |
Sep. 17, 1991 |
| 4298038 |
Technique and device for measuring fluids including finger valve and filler mechanism |
Nov. 3, 1981 |
| 4084786 |
Valves |
Apr. 18, 1978 |
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