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Class Information
Number: 137/522
Name: Fluid handling > Line condition change responsive valves > Direct response valves (i.e., check valve type) > With external means for opposing bias
Description: Valves provided with means external to and independent of the flow path of the fluid controlled for opening the valve against its bias or for relieving the valve of the effect of the bias so that normal fluid pressure will open the valve.

Sub-classes under this class:

Class Number Class Name Patents
137/523 With means for retaining external means in bias opposing position 68

Patents under this class:
1 2 3 4

Patent Number Title Of Patent Date Issued
8684030 Inflatable device with fluid controller and self-sealing valve Apr. 1, 2014
8677956 Control valve for a device for variably adjusting the control times of gas-exchange valves of an internal combustion engine Mar. 25, 2014
8671975 Compliant-seal check valve Mar. 18, 2014
8608004 Sprayer tank cap with incorporated pressure relief valve Dec. 17, 2013
8602045 Clean-in-place valve assembly and method of operation Dec. 10, 2013
8573167 Control valve for a device for variably adjusting the control times of gas-exchange valves of an internal combustion engine Nov. 5, 2013
8413674 Valve with electromechanical device for actuating the valve Apr. 9, 2013
8376737 Hot air blower Feb. 19, 2013
8371350 Device for connecting a tire of an aircraft wheel to a pneumatic unit of the aircraft Feb. 12, 2013
8181664 Releasing valve for an inflatable object May. 22, 2012
8113235 Apparatus and methods for facilitating prosthesis donning, doffing, retention, and fit Feb. 14, 2012
7992610 Device for connecting a tire of an aircraft wheel to a pneumatic unit of the aircraft Aug. 9, 2011
7895993 Internal combustion engine having exhaust gas recirculation Mar. 1, 2011
7866626 Hydraulically controlled in-line valve apparatus Jan. 11, 2011
7784465 Laryngeal mask vent clip and method of use Aug. 31, 2010
7644724 Valve with electromechanical device for actuating the valve Jan. 12, 2010
7469713 Check valve with locking key and pull cord Dec. 30, 2008
7448406 Hydraulic coupler pressure relief tool Nov. 11, 2008
7357152 Releasable non-return valve Apr. 15, 2008
7273065 Inflation/deflation valve for cargo dunnage Sep. 25, 2007
7270145 unloading/venting valve having integrated therewith a high-pressure protection valve Sep. 18, 2007
7178554 Ultrasonically controlled valve Feb. 20, 2007
6981852 Strainer and valve release Jan. 3, 2006
6938597 Variable spring force intake valve assembly Sep. 6, 2005
6823905 Inflation valve assembly for a dunnage or cargo air bag Nov. 30, 2004
6820645 Unlockable non-return valve for very high system pressures Nov. 23, 2004
6810862 Fuel tank vapor relief valve and method of making same Nov. 2, 2004
6766824 Fluid control valve and a feedback control system therefor Jul. 27, 2004
6648012 Non-return valve override device Nov. 18, 2003
6626204 Cylinder valve assembly with check valve Sep. 30, 2003
6607366 Variable clearance system for reciprocating compressors Aug. 19, 2003
6601603 Clean-in-place air-blow valve Aug. 5, 2003
6578604 Ball valve with slot for continuous flow Jun. 17, 2003
6537258 Valve for medical infusion lines and the like Mar. 25, 2003
6530751 Device for controlling air filling and exhausting of an air cushion Mar. 11, 2003
6513556 Flexible hose passive shut down system Feb. 4, 2003
6508270 Shut-off valve Jan. 21, 2003
6488479 Variable pressure oil pump Dec. 3, 2002
6361288 Variable clearance system for reciprocating compressors Mar. 26, 2002
6289927 Pressure control valve Sep. 18, 2001
6244294 Radiator pressure release valve for a temperature control system Jun. 12, 2001
6237693 Failsafe safety valve and method May. 29, 2001
6170513 Inflation nozzle structure of an inflatable envelope Jan. 9, 2001
6149125 Positively controlled ball valve Nov. 21, 2000
6135143 Air valve for an inflatable article Oct. 24, 2000
6077249 Tubular shaft instrument Jun. 20, 2000
6029706 Valve of a storage tank for transporting oils or chemical compounds Feb. 29, 2000
6019122 Membrane-type inflation nozzle Feb. 1, 2000
6014986 Valve for a cooking utensil Jan. 18, 2000
5967488 Electrically actuated reed valve Oct. 19, 1999

1 2 3 4

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