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Class Information
Number: 137/206
Name: Fluid handling > Diverse fluid containing pressure systems > Gas pressure storage over or displacement of liquid
Description: Apparatus wherein a gas under pressure is provided over a body of liquid or is utilized to displace a liquid and a definite coaction exists between the gas and liquid which affects the system.

Sub-classes under this class:

Class Number Class Name Patents
137/208 Plural units 47
137/207 Surge suppression 72
137/209 With gas maintenance or application 254
137/213 With liquid level responsive gas vent or whistle 4
137/207.5 With return of liquid to supply 8

Patents under this class:
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Patent Number Title Of Patent Date Issued
8647720 Method of mixing and applying multi-component paint Feb. 11, 2014
8567299 Pressurized fluid delivery system and method of use Oct. 29, 2013
8561631 Liquid impact pressure control methods and systems Oct. 22, 2013
8501282 Paint applicator Aug. 6, 2013
8387649 Tank condensation drain Mar. 5, 2013
8360099 Failure protection apparatus for a pressure control assembly Jan. 29, 2013
8281807 Fluid path connectors and container spikes for fluid delivery Oct. 9, 2012
8261764 Powerless air charging apparatus, system, and method Sep. 11, 2012
8241590 Discharge volume control method, discharge pressure control method, and microbody forming method Aug. 14, 2012
8171876 Applicator and method for transferring dispersion liquid May. 8, 2012
8124031 Discharge volume control method, discharge pressure control method, and microbody forming method Feb. 28, 2012
8075282 Sprayer pump primed by using venturi Dec. 13, 2011
7950920 Combustion device May. 31, 2011
7938959 Fryer oil usage system May. 10, 2011
7878214 Ullage pressure regulator Feb. 1, 2011
7763211 Method and apparatus for generating large pressures on a microfluidic chip Jul. 27, 2010
7264327 Pressure regulation by transfer of a calibrated gas volume Sep. 4, 2007
7195035 In-tank hydrogen distribution valve Mar. 27, 2007
7044404 Pneumatic liquid-delivery device May. 16, 2006
6976497 Pressure-differential liquid raising system Dec. 20, 2005
6779548 Chemical injection system and method Aug. 24, 2004
6638649 Method and article of manufacture to effect an oxygen deficient fuel cell Oct. 28, 2003
6595957 Surgical fluid management system with a dampening chamber Jul. 22, 2003
6558823 Method and article of manufacture to effect an oxygen deficient fuel cell May. 6, 2003
6481456 Liquid treatment apparatus and float valve therefor Nov. 19, 2002
6390340 Liquid soap dispenser May. 21, 2002
6167756 Pivotal float for liquid level detection apparatus Jan. 2, 2001
6142169 Sterile tank venting system for a filling machine Nov. 7, 2000
5485865 Air volume control valve for water system pressure tank Jan. 23, 1996
5449016 Sewage system Sep. 12, 1995
5344071 Expansion tank airation device Sep. 6, 1994
5319172 Microwave melting furnace for treating liquid Jun. 7, 1994
5182834 Vacuum pump-out control valve for wet/dry vacuum cleaner Feb. 2, 1993
5131424 Precision pressure control system Jul. 21, 1992
4867195 Vapor pressure control system Sep. 19, 1989
4865802 Accumulator Sep. 12, 1989
4805552 Apparatus for regulating the flow of gaseous and liquid media Feb. 21, 1989
4733852 Gas-liquid separator Mar. 29, 1988
4702755 Drip trap Oct. 27, 1987
4589434 Method and apparatus to prevent hydrate formation in full wellstream pipelines May. 20, 1986
4585022 Arrangement for cleaning fuel with an electrical water level indicating device Apr. 29, 1986
4584176 Method and apparatus for storing bicarbonate dialysate Apr. 22, 1986
4526191 Fluid supply container for color changer Jul. 2, 1985
4387734 Apparatus and method for spontaneous meniscus generation Jun. 14, 1983
4279269 Liquid flow control means for gas-liquid receptacle Jul. 21, 1981
4233698 Pressure flush tank for toilets Nov. 18, 1980
4223696 Apparatus for the purpose of avoiding pressure drop between a gaseous or vaporous phase and a liquid phase Sep. 23, 1980
4204556 Self-contained, automatic primer valve for sewer line drain traps May. 27, 1980
4199000 Cross-contamination isolator Apr. 22, 1980
4195653 Method and apparatus for recovering products of low pumpability Apr. 1, 1980

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