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Class Information
Number: 137/533.17
Name: Fluid handling > Line condition change responsive valves > Direct response valves (i.e., check valve type) > Reciprocating valves > Weight biased > Valve body is the weight > Guided head
Description: Devices in which means are provided to guide the head to or from its seat.










Sub-classes under this class:

Class Number Class Name Patents
137/533.19 Cage 45
137/533.21 Guide stem 41


Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
8579610 High compression downhole pump Nov. 12, 2013
8485258 Use of autonomous (self-adjusting) valves in injectors in oil production Jul. 16, 2013
8342203 Pressure relief valve Jan. 1, 2013
8342168 System for heating liquid by solar radiation Jan. 1, 2013
8162462 Check valve unit for solid ink reservoir system Apr. 24, 2012
7431048 Backflow preventer Oct. 7, 2008
7422030 Air admittance valve assembly Sep. 9, 2008
7108494 Apparatus for preventing the backflow of gas of scroll compressor Sep. 19, 2006
7104470 Device for producing high pressure in a fluid in miniature Sep. 12, 2006
6918547 Device for producing high pressure in a fluid in miniature Jul. 19, 2005
6823893 Non-return valve Nov. 30, 2004
6769446 Freeze protection device for wall hydrants/faucets Aug. 3, 2004
6726124 Device for producing high pressure in a fluid in miniature Apr. 27, 2004
6712591 Discharge valve of a hermetic compressor using stopper and weight driven disc valve Mar. 30, 2004
6668856 Valve with guided ball Dec. 30, 2003
6517011 Fuel injector with pressurized fuel reverse flow check valve Feb. 11, 2003
6402055 Device for producing high pressure in a fluid in miniature Jun. 11, 2002
6360766 Check valve with an integral breakaway retainer Mar. 26, 2002
6227830 Check valve mounted adjacent scroll compressor outlet May. 8, 2001
6065948 Discharge check valve in a scroll compressor May. 23, 2000
5992442 Relief valve for use with hermetically sealed flexible container Nov. 30, 1999
5897305 Valve assembly for compressors Apr. 27, 1999
5894741 Universal housing body for an expansion device having a movable orifice piston for metering refrigerant flow Apr. 20, 1999
5836170 Vacuum release valve tube assembly Nov. 17, 1998
5797427 Fuel injector check valve Aug. 25, 1998
5788289 One-piece coupler for connecting hoses Aug. 4, 1998
5709242 Device for blocking a liquid flow through a pipe in one direction Jan. 20, 1998
5701931 Water relief valve for a drainage system Dec. 30, 1997
5683236 Anti-reverse rotation valve for scroll compressor Nov. 4, 1997
5520522 Valve arrangement for a micro pump May. 28, 1996
5365906 Fluid flow check valve for fuel system Nov. 22, 1994
5199860 Hydraulic reciprocating piston pump for brake installations of motor vehicles with an ABS system Apr. 6, 1993
5161574 Maximum operation angle single plug and puppet type retention valves Nov. 10, 1992
5141420 Scroll compressor discharge valve Aug. 25, 1992
5100299 Process for pumping a two phase mixture Mar. 31, 1992
5097864 Adjustable flow poppet valve for injection molding Mar. 24, 1992
5062451 Maximum flow single plug retention valve Nov. 5, 1991
5014729 Expansion device for a refrigeration system, piston therefor and methods of making the same May. 14, 1991
4901757 One way valve Feb. 20, 1990
4896696 Flow control restrictor Jan. 30, 1990
4869290 Expansion device for a refrigeration system, piston therefor and methods of making the same Sep. 26, 1989
4856823 Coupling with improved locking/unlocking member Aug. 15, 1989
4836199 Aspirating/ventilating apparatus and method Jun. 6, 1989
4784177 Expansion device for a refrigeration system, piston therefor and methods of making the same Nov. 15, 1988
4768932 Hydraulic paint pump Sep. 6, 1988
4696296 Aspirating/ventilating apparatus Sep. 29, 1987
4674529 Check valve Jun. 23, 1987
4660803 Quick coupling connector for connecting flexible liquid conduits Apr. 28, 1987
4655248 Check valve Apr. 7, 1987
4643222 Check valve Feb. 17, 1987

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