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Class Information
Number: 137/533
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
Description: Valves in which the weight of the valve itself is utilized as the biasing means.










Sub-classes under this class:

Class Number Class Name Patents
137/533.11 Ball valves 172
137/533.17 Guided head 66


Patents under this class:

Patent Number Title Of Patent Date Issued
8529030 Check valve unit for solid ink reservoir system Sep. 10, 2013
8272398 Liquid discriminating vent valve Sep. 25, 2012
8162462 Check valve unit for solid ink reservoir system Apr. 24, 2012
8051869 Gravity operated valve Nov. 8, 2011
7314187 Atomizer for applying liquids onto eyes Jan. 1, 2008
7121291 Check valve, auxiliary circulating device and method for driving the auxiliary circulating device Oct. 17, 2006
6817373 One-directional microball valve for a microfluidic device Nov. 16, 2004
6619316 Check valve having adjustable lift, packing assembly, and retrofit kit for same Sep. 16, 2003
6598616 Tapping point and supply water network comprising such tapping point Jul. 29, 2003
6497373 Device for producing high pressure in a fluid in miniature Dec. 24, 2002
6402055 Device for producing high pressure in a fluid in miniature Jun. 11, 2002
6346219 FCC feed injector with closure plug Feb. 12, 2002
6305420 Head gasket with a check valve Oct. 23, 2001
6149139 Membrane carburetor for a portable handheld work apparatus Nov. 21, 2000
6119735 Filling of tanks with volatile liquids Sep. 19, 2000
6095185 Fluid-flow control device particularly useful as a drip-irrigation emitter Aug. 1, 2000
6065948 Discharge check valve in a scroll compressor May. 23, 2000
6021810 Inlet check valve Feb. 8, 2000
5904179 Inlet check valve May. 18, 1999
5819785 Instantaneous hot water control device Oct. 13, 1998
5725018 Gravity check valve Mar. 10, 1998
5715863 Tube quick disconnector Feb. 10, 1998
5680881 Valve system for hermetic reciprocating compressor Oct. 28, 1997
5623958 Low pressure relief valve Apr. 29, 1997
5611681 Reciprocating rod type pump for shear sensitive material Mar. 18, 1997
5354133 Relief valve Oct. 11, 1994
5189877 Exhaust manifold air injector Mar. 2, 1993
5127904 Improved needle-less parenteral fluid injector Jul. 7, 1992
5041087 Needle-less parenteral fluid injector Aug. 20, 1991
4768720 Fuel injection Sep. 6, 1988
4683910 High-speed protective check valving for pressure transducers and the like Aug. 4, 1987
4586910 Inflation valve for balloons and the like May. 6, 1986
4570669 Simplified springless check valve Feb. 18, 1986
4531543 Uni-directional flow, fluid valve Jul. 30, 1985
4341240 Beer tap construction Jul. 27, 1982
4310017 Backflow check valve for use with IV administration sets Jan. 12, 1982
4300592 Pressure regulator Nov. 17, 1981
4266568 Vacuum breaker-pressure release device May. 12, 1981
4232706 Automatic valve device for sanitation waste pipes Nov. 11, 1980
4143787 Captivated over-pressure relief air vent assembly Mar. 13, 1979
4023591 Valve of particulated material for vertical forced air channel May. 17, 1977
4005710 Parenteral apparatus with one-way valve Feb. 1, 1977











 
 
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