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Class Information
Number: 137/516.15
Name: Fluid handling > Line condition change responsive valves > Direct response valves (i.e., check valve type) > Single head, plural ports in parallel > Annular head
Description: Valves wherein the valve head is annular in form.










Sub-classes under this class:

Class Number Class Name Patents
137/516.17 Central post on seat 19


Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
8616523 Low-pressure valve with an inner and outer throughflow cross section Dec. 31, 2013
8282368 Check valve Oct. 9, 2012
7819131 Springless compressor valve Oct. 26, 2010
6848471 In-line check valve Feb. 1, 2005
6695011 Flow regulator Feb. 24, 2004
6575192 Check valve for a prechamber assembly Jun. 10, 2003
6539974 Valve with guide extensions for valve plate Apr. 1, 2003
6428292 Discharge valve Aug. 6, 2002
6296013 Pressure/flow rate control valve Oct. 2, 2001
6171084 Discharge valve Jan. 9, 2001
5785073 Pipe burst protection pressure relief apparatus for sliding plate plumbing fixtures Jul. 28, 1998
RE35532 Air Admittance valve for resisting high internal pressure Jun. 17, 1997
5411054 Positive displacement compressor May. 2, 1995
5311902 Reciprocating compressor valve May. 17, 1994
5273068 Air admittance valve for resisting high internal pressure Dec. 28, 1993
5230363 Suction valve for high pressure slurry pump Jul. 27, 1993
5052434 Valve, especially for compressors Oct. 1, 1991
5048562 One way air admittance valve Sep. 17, 1991
5022832 Ring valve type air compressor Jun. 11, 1991
5011383 Valve assembly, for use in combination with a straight-cylinder, gas-compression chamber, and in combination therewith Apr. 30, 1991
5007454 Fluid control valve with tubular poppet Apr. 16, 1991
4945946 Valve seat for a plate-type, fluid-control valve Aug. 7, 1990
4924906 Ring valve May. 15, 1990
4867200 Unidirectional fluid flow check valve assembly Sep. 19, 1989
4856558 Flapper control valve Aug. 15, 1989
4834632 Compressor valve system May. 30, 1989
4687435 Pulse combustor Aug. 18, 1987
4669498 Controllable air valve for an inflatable body Jun. 2, 1987
4628958 Ring valve Dec. 16, 1986
4597411 Restriction valve device for hydraulic pressure fluids in vehicle shock absorbing mechanisms Jul. 1, 1986
4549565 Reclosing rupture disk assembly Oct. 29, 1985
4532959 Valving element for a plate-type valve Aug. 6, 1985
4531543 Uni-directional flow, fluid valve Jul. 30, 1985
4495964 Unidirectional-flow fluid valve Jan. 29, 1985
4483363 Compressor valve Nov. 20, 1984
4461452 Valve assembly for a pressure-cooker Jul. 24, 1984
4450861 Compressed gas saving device May. 29, 1984
4398559 Valve member and assembly with inlet and outlet pressure relief grooves Aug. 16, 1983
4346704 Sleeve valve for parenteral solution device Aug. 31, 1982
4283991 Percussion mechanism Aug. 18, 1981
4278106 Plate check valve Jul. 14, 1981
4266465 Percussion mechanism May. 12, 1981
4249564 Valve mount for a compressor pressure valve Feb. 10, 1981
4212319 Anti-backflow device for sillcocks Jul. 15, 1980
4194435 Percussion mechanism Mar. 25, 1980
4131722 Non-fouling resealable vent Dec. 26, 1978
4100934 Reciprocating refrigerant compressor valve arrangement Jul. 18, 1978
4064897 Tire filler valve arrangement Dec. 27, 1977
4060098 Valve plate construction Nov. 29, 1977
3983907 Valve device, especially for air cushions Oct. 5, 1976

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