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Class Information
Number: 137/516.13
Name: Fluid handling > Line condition change responsive valves > Direct response valves (i.e., check valve type) > Single head, plural ports in parallel > Concentric ports
Description: Valves wherein the ports are arranged concentrically.










Patents under this class:

Patent Number Title Of Patent Date Issued
8616523 Low-pressure valve with an inner and outer throughflow cross section Dec. 31, 2013
8444402 Automatic concentric crank-side compressor valve May. 21, 2013
7886764 Automatic annular valve Feb. 15, 2011
7819131 Springless compressor valve Oct. 26, 2010
7240796 Packaging release valve for refrigerated food items Jul. 10, 2007
6796741 In-situ bioremediation process and apparatus Sep. 28, 2004
6575192 Check valve for a prechamber assembly Jun. 10, 2003
6510868 Profiled plate valve Jan. 28, 2003
6490738 Overflow preventor Dec. 10, 2002
6149400 Method and apparatus for a suction valve of the plate-type construction Nov. 21, 2000
5669411 Compressor valve Sep. 23, 1997
5620427 Luer lock system Apr. 15, 1997
5411054 Positive displacement compressor May. 2, 1995
5390700 Automatic valve Feb. 21, 1995
5311902 Reciprocating compressor valve May. 17, 1994
5215538 Connector-activated in-line valve Jun. 1, 1993
5052434 Valve, especially for compressors Oct. 1, 1991
5027784 PCV system with a check valve device Jul. 2, 1991
4951706 Flapper check valve Aug. 28, 1990
4945946 Valve seat for a plate-type, fluid-control valve Aug. 7, 1990
4913187 Compressor valve with flat spring Apr. 3, 1990
4889156 Compressor valve with flat spring Dec. 26, 1989
4854341 Plate valve Aug. 8, 1989
4852608 Fluid control valve Aug. 1, 1989
4705068 Ported-plate, fluid control valve Nov. 10, 1987
4643220 Unidirectional fluid control valve Feb. 17, 1987
4627464 Unidirectional, fluid control valve Dec. 9, 1986
4532959 Valving element for a plate-type valve Aug. 6, 1985
4526195 Reinforced plastic structure such as a valve Jul. 2, 1985
4516602 Disc valve May. 14, 1985
4478243 Valve assembly Oct. 23, 1984
4402342 Compressor valve Sep. 6, 1983
4307751 Plate valve Dec. 29, 1981
4278106 Plate check valve Jul. 14, 1981
4231394 Closing member for a ring valve Nov. 4, 1980
4184818 Valve for piston compressors and pumps Jan. 22, 1980
3981636 Diaphragm vacuum pump Sep. 21, 1976
3935850 Vapor regulating valve Feb. 3, 1976











 
 
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