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Class Information
Number: 137/516.17
Name: Fluid handling > Line condition change responsive valves > Direct response valves (i.e., check valve type) > Single head, plural ports in parallel > Annular head > Central post on seat
Description: Valves wherein the seat supports a post, the said post being substantially concentric with the annular head.










Sub-classes under this class:

Class Number Class Name Patents
137/516.23 Guide 15
137/516.19 Stop 8


Patents under this class:

Patent Number Title Of Patent Date Issued
8297318 Check valve Oct. 30, 2012
8267116 Strainer and anti-backflow device for compressors Sep. 18, 2012
7980266 Soffit vent Jul. 19, 2011
6422122 Electronically controllable brake booster Jul. 23, 2002
5678603 Plate valve, particularly for piston compressors Oct. 21, 1997
5390698 Plate-type, unidirectional-flow, fluid control valve Feb. 21, 1995
5249595 Valve, in particular for a piston-type compressor Oct. 5, 1993
5072812 Hydraulic shock absorber Dec. 17, 1991
4924906 Ring valve May. 15, 1990
4862898 Air flow sensor Sep. 5, 1989
4860765 Air flow sensor Aug. 29, 1989
4860764 Air flow sensor Aug. 29, 1989
4811757 Discharge valve for compressor Mar. 14, 1989
4635849 Piezoelectric low-pressure fuel injector Jan. 13, 1987
RE30327 Inflator seal Jul. 8, 1980
4196746 Gas compressor valve Apr. 8, 1980
4039002 Gas compressor valve Aug. 2, 1977
3971407 Means for locating suction valve Jul. 27, 1976
3945474 Shock absorber Mar. 23, 1976











 
 
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