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Class Information
Number: 137/505.12
Name: Fluid handling > Line condition change responsive valves > With separate connected fluid reactor surface > With opening bias (e.g., pressure regulator) > Multi-stage
Description: Devices in series with another line pressure responsive valve to produce plural stage reduction.










Patents under this class:
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Patent Number Title Of Patent Date Issued
8679694 Fluidic control system and method of manufacture Mar. 25, 2014
8656945 Pressure control valve assembly for containers adapted to contain compressed fluids Feb. 25, 2014
8640732 High pressure inlet regulator Feb. 4, 2014
8622081 Fluid flow control valve Jan. 7, 2014
8616228 Multi-stage ratio pressure regulator system Dec. 31, 2013
8550112 Multifunctional safety valve device with incorporated proportional pressure regulator Oct. 8, 2013
8448662 High inlet pressure three-stage pressure regulator May. 28, 2013
8424560 Multi-valve microfluidic devices and methods Apr. 23, 2013
8375983 Multi-stage fluid regulators Feb. 19, 2013
8286660 Valve body with dual sense mechanism Oct. 16, 2012
8240327 Pressure loaded service regulator with pressure balanced trim Aug. 14, 2012
8220479 Multi-stage ratio pressure regulator system Jul. 17, 2012
8177737 Drainage system for treating hydrocephalus May. 15, 2012
8151822 Integral overpressure monitoring device Apr. 10, 2012
8117839 Propane injection system Feb. 21, 2012
8087428 High pressure inlet regulator Jan. 3, 2012
7635005 Very small high pressure regulator Dec. 22, 2009
7575020 Multi stage pressure regulator Aug. 18, 2009
7565911 Two stage regulator method and apparatus Jul. 28, 2009
7352287 Pneumatic controller Apr. 1, 2008
7264896 Two-stage hybrid gas pressure regulator Sep. 4, 2007
7191768 Gas fuel feed device Mar. 20, 2007
6948519 Device for regulating the flow of gas toward user equipment Sep. 27, 2005
6923197 Pressure regulator with tamper-proof safety feature Aug. 2, 2005
6901952 Gas flow regulation system Jun. 7, 2005
6722388 Multiple pressure regulator Apr. 20, 2004
6691798 Variable hand pressure activated power tool Feb. 17, 2004
6591851 Seal-gas valve device Jul. 15, 2003
6488046 Pressure reducer for compressed gases Dec. 3, 2002
6253708 Remote controlled drinker system and drinker line control valve Jul. 3, 2001
6186168 Pressure Regulator Feb. 13, 2001
6176256 Gas pressure-reducing valve Jan. 23, 2001
6173735 Method and apparatus for regulating gas flow Jan. 16, 2001
5996617 Low pressure regulator Dec. 7, 1999
5868154 Propane supply system with secondary containment tank Feb. 9, 1999
5797425 Three stage gas pressure regulator Aug. 25, 1998
5755254 Two stage pressure regulator May. 26, 1998
5740833 Gas pressure regulator Apr. 21, 1998
5730166 Fluid pressure reduction Mar. 24, 1998
5598869 Pressure regulating unit Feb. 4, 1997
5520206 Exhaust reduction system for control valves May. 28, 1996
5515930 Handheld pneumatic power tool apparatus May. 14, 1996
5465750 Two-stage regulator Nov. 14, 1995
5456281 Gas regulator with double stabilizing function Oct. 10, 1995
5456280 Process-chamber flow control system Oct. 10, 1995
5330031 Alternative fuel system for powered industrial vehicle Jul. 19, 1994
5203371 Gas regulator with several stage adjustment Apr. 20, 1993
5186208 Two-step reduction valve especially for gas cylinders Feb. 16, 1993
5103861 Sealing means for a two-stage gas regulator for liquefied-gas containers Apr. 14, 1992
4909278 Gas flow control system with pilot gas booster Mar. 20, 1990

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