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Class Information
Number: 137/543.23
Name: Fluid handling > Line condition change responsive valves > Direct response valves (i.e., check valve type) > Reciprocating valves > Spring biased > Spring coaxial with valve > Head between spring and guide
Description: Valves wherein the head is provided with a guide and the spring is on the side of the head opposite the guide.










Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
8631860 Water-cooled heat dissipation system and water tank thereof Jan. 21, 2014
8539976 Back pressure valve with double barrier sealing Sep. 24, 2013
8474415 Internally dampened pressure relief valve Jul. 2, 2013
8291932 Valve means Oct. 23, 2012
7954510 Pump valve retainer Jun. 7, 2011
7686033 Valve connector Mar. 30, 2010
7681589 Pump valve retainer Mar. 23, 2010
7673651 Flow regulating device Mar. 9, 2010
7552745 Valve connector Jun. 30, 2009
7448408 Check valve Nov. 11, 2008
7231938 Check valve for pump of electronically controlled brake system Jun. 19, 2007
7225830 Fluid control valve Jun. 5, 2007
7222637 Connector equipped with a valve May. 29, 2007
7096884 Check valve Aug. 29, 2006
7074020 Sanitary pump and sanitary valve Jul. 11, 2006
7051756 Two stage metered relief check valve May. 30, 2006
7036523 Serviceable check valve May. 2, 2006
7007591 Steam valve for a coffee maker Mar. 7, 2006
6953325 Safety device to limit pressure in an axial-piston compressor housing Oct. 11, 2005
6910871 Valve guide and spring retainer assemblies Jun. 28, 2005
6729347 Device for pressure regulation May. 4, 2004
6623259 High pressure plunger pump housing and packing Sep. 23, 2003
6532987 Relief valve Mar. 18, 2003
6397884 Connection structure and valved connection member Jun. 4, 2002
6343724 Unitary one-way valve for fluid dispenser Feb. 5, 2002
6314753 Supercooling degree-controlled expansion valve Nov. 13, 2001
6209527 Pressure regulating valve Apr. 3, 2001
6009895 Free rotating inlet check valve for inflatable devices Jan. 4, 2000
6006782 Snubber valve Dec. 28, 1999
5996619 Control valve Dec. 7, 1999
5921274 Internal relief and bypass valve for pumps and piping systems Jul. 13, 1999
5918619 Safety pressure relief valve assembly, components therefor and methods of making the same Jul. 6, 1999
5901743 Valve system, especially for use in veterinary syringes May. 11, 1999
5692538 Undersea hydraulic coupling member Dec. 2, 1997
5605449 Suction and discharge valve arrangement for a high pressure piston pump Feb. 25, 1997
5511583 Compressor valve Apr. 30, 1996
5482077 High pressure abrasive slurry check valve Jan. 9, 1996
5462413 Disposable relief valve seat for positive displacement pump Oct. 31, 1995
5332000 Low pressure sensitive valve Jul. 26, 1994
5271429 Internal combustion engine lubricating oil filter valve Dec. 21, 1993
5257918 Fuel injection pump with a conical transition outlet area Nov. 2, 1993
5241986 Check valve assembly for high-pressure applications Sep. 7, 1993
5176175 Valve assembly Jan. 5, 1993
5172716 Recirculation valve Dec. 22, 1992
5161572 Pressure valve Nov. 10, 1992
5052435 Pump valve Oct. 1, 1991
5036882 Valve assembly for decanter for wastewater treatment facility Aug. 6, 1991
5033506 Delivery valve Jul. 23, 1991
4958657 Gas supply safety device Sep. 25, 1990
4953589 Sealing device of delivery valve for fuel injection units Sep. 4, 1990

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