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Class Information
Number: 137/469
Name: Fluid handling > Line condition change responsive valves > Pop valves
Description: Valves which are biased closed and are forced open by fluid pressure, the fluid flowing through the valve after the initial opening movement thereof acting on an auxiliary reactor surface to affect the valve opening and/or closing motion.










Sub-classes under this class:

Class Number Class Name Patents
137/475 Adjustable choke 3
137/474 Lost motion between pop pressure reactor and valve 9
137/470 Pop closing valves 6
137/472 Pop pressure reactor in branched released path 7
137/471 Pop pressure reactor in inflow to valve 15


Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8701631 Pressure relief valve and high pressure pump with such valve Apr. 22, 2014
8557454 Fuel cell system and reverse flow relief valve Oct. 15, 2013
8517049 Pressure relief valve Aug. 27, 2013
8479764 Safety valve Jul. 9, 2013
8291932 Valve means Oct. 23, 2012
8069950 Environmental compressor protection assembly Dec. 6, 2011
8061382 Sanitary valve assembly Nov. 22, 2011
7628169 Safety relief valve having a low blow-down value and spring therefore Dec. 8, 2009
7565914 Control stop and flushing system Jul. 28, 2009
7513270 Balanced safety relief valve Apr. 7, 2009
7469714 Valve, especially a gas safety valve Dec. 30, 2008
7337796 Safety relief valve having a low blow-down value and spring therefore Mar. 4, 2008
7240768 Flapper finger valve Jul. 10, 2007
7234486 Pressure limiting valve for fuel injection devices Jun. 26, 2007
7210497 Pressure relief device with increased flow rate May. 1, 2007
7051756 Two stage metered relief check valve May. 30, 2006
6899199 Flapper finger valve assembly May. 31, 2005
6668853 Pressure relief valve with field-replaceable high corrosion-resistant components Dec. 30, 2003
6651696 Relief valve Nov. 25, 2003
6516828 Snap-type safety relief valve having a consistent low blow-down value Feb. 11, 2003
6514232 Vacuum adjustment valve, particularly for thoracic drainage devices Feb. 4, 2003
6497248 Pressure relief device with one piece gasket Dec. 24, 2002
6488049 Super sensitive, full flow, adjustable pressure valve Dec. 3, 2002
6354810 Variable capacity type compressor with check value Mar. 12, 2002
6283138 Pressure relief valve monitoring device Sep. 4, 2001
6273116 Method and device for opening a valve, especially a load changing valve of an internal combustion engine Aug. 14, 2001
6237623 Nonsurgical intraurethral bladder control device May. 29, 2001
6189562 Overflow valve Feb. 20, 2001
6174151 Fluid energy transfer device Jan. 16, 2001
6125822 Two stage pressure relief valve Oct. 3, 2000
5921274 Internal relief and bypass valve for pumps and piping systems Jul. 13, 1999
5844137 Purge system Dec. 1, 1998
5791373 Fluid sealing disc and seat mechanism Aug. 11, 1998
5769115 Control valve Jun. 23, 1998
5762101 Pressure regulating valve Jun. 9, 1998
5623962 Pressure relief valve Apr. 29, 1997
5560343 Pressure-limiting valve Oct. 1, 1996
5520209 Fluid relief device May. 28, 1996
5479978 Pressure-vacuum relief valve assembly Jan. 2, 1996
5437268 Diving regulator demand valve with baffles to reduce breathing effort and venturi adjusting means Aug. 1, 1995
5425390 Purging method Jun. 20, 1995
5370151 Safety valve Dec. 6, 1994
5333635 Fluid pressure relief system for pressure vessels Aug. 2, 1994
5265642 Pressure relief valve in a cap Nov. 30, 1993
5251664 Quiet check valve for pulsating flow Oct. 12, 1993
5215114 Safety valve Jun. 1, 1993
5203372 Jet-flow pressure relief vent Apr. 20, 1993
5174327 In-line check valve Dec. 29, 1992
5170818 Safety valve Dec. 15, 1992
5165444 Spill valve Nov. 24, 1992

1 2 3










 
 
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