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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:

Class Number Class Name Patents
137/614.17 Also carries head of other valve 137


Patents under this class:

Patent Number Title Of Patent Date Issued
8596301 Valve assembly Dec. 3, 2013
8567439 Flow divider for hydraulic circuits Oct. 29, 2013
8220488 Flow control valve with internal isolation means Jul. 17, 2012
8171958 Integrated plug/choke valve May. 8, 2012
7469707 Irrigation control valve and system Dec. 30, 2008
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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