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Class Information
Number: 137/614.16
Name: Fluid handling > Systems > Flow path with serial valves and/or closures > One valve head provides seat for other head
Description: Systems in which the movable element of one valve forms the seat for the movable element of another valve.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7364131 |
Non-return valve for use in a molding system |
Apr. 29, 2008 |
| 7347405 |
Inlet valve for pneumatic tool |
Mar. 25, 2008 |
| 7128080 |
Surge prevention device |
Oct. 31, 2006 |
| 6901962 |
Surge prevention device |
Jun. 7, 2005 |
| 6769446 |
Freeze protection device for wall hydrants/faucets |
Aug. 3, 2004 |
| 6622743 |
Surge prevention device |
Sep. 23, 2003 |
| 5971356 |
Electromagnetically actuable valve |
Oct. 26, 1999 |
| 5865213 |
Controllable valve |
Feb. 2, 1999 |
| 4932435 |
Multi-stage flow regulating valve |
Jun. 12, 1990 |
| 4892071 |
Throttle valve controlling apparatus employing electrically controlled actuator |
Jan. 9, 1990 |
| 4823841 |
Fluid mixing device, in particular hot and cold water mixing device |
Apr. 25, 1989 |
| 4804017 |
Brake bleeder valve apparatus having integral check valve and method for bleeding brakes |
Feb. 14, 1989 |
| 4747942 |
Pulse generator for an air pulsed jigging machine |
May. 31, 1988 |
| 4690169 |
Combined shut off and check valve |
Sep. 1, 1987 |
| 4649952 |
Combined shut off and check valve |
Mar. 17, 1987 |
| 4617964 |
Tight shut-off valve with flow control |
Oct. 21, 1986 |
| 4574839 |
Directional control valve with integral flow control valve |
Mar. 11, 1986 |
| 4350321 |
Quick coupling device for pressurized fluid conduits |
Sep. 21, 1982 |
| 4294285 |
Multi-port valve |
Oct. 13, 1981 |
| 4254792 |
Double-seat valve |
Mar. 10, 1981 |
| 4111220 |
Shake responsive valve |
Sep. 5, 1978 |
| 4106750 |
Safety valve for pneumatic tools |
Aug. 15, 1978 |
| 4074686 |
Manually closable anti-backup trap |
Feb. 21, 1978 |
| 3986524 |
Valve construction and method of making the same |
Oct. 19, 1976 |
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