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Class Information
Number: 137/81.1
Name: Fluid handling > Ambient condition change responsive > Atmospheric > Pressure
Description: Apparatus in which a fluid flow is controlled in response to variations of atmospheric pressure.

Patents under this class:
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Patent Number Title Of Patent Date Issued
8496005 Breathing mask and regulator for aircraft Jul. 30, 2013
8408247 Element for controlling filling and/or drawing of a pressurized gas, tank and circuit provided with such an element Apr. 2, 2013
8274245 Actuating device and method of operating an actuating device Sep. 25, 2012
8087424 Subsea valve actuator apparatus Jan. 3, 2012
8061384 Pressure control device Nov. 22, 2011
7836886 Breathing mask and regulator for aircraft Nov. 23, 2010
7823604 Exhaust apparatus pressure control system Nov. 2, 2010
7793680 Electromechanical regulator with primary and backup modes of operation for regulating passenger oxygen Sep. 14, 2010
7789101 Oxygen supply system having a central flow control Sep. 7, 2010
7604019 Electromechanical regulator with primary and backup modes of operation for regulating passenger oxygen Oct. 20, 2009
7531980 Aircraft cabin pressure controls: duty cycle offset to compensate for asymmetric motor loading in an open-loop motor control system May. 12, 2009
7398794 First stage pressure reducing valve having a tubular plug, particularly for regulators of scuba breathing apparatus Jul. 15, 2008
7341072 Oxygen supply system having a central flow control unit Mar. 11, 2008
7299817 Passive, double acting, vacuum actuated vent valve Nov. 27, 2007
7209806 Self-contained electronic pressure monitoring and shutdown device Apr. 24, 2007
7143781 Flexible bladder apparatus for fluid flow control Dec. 5, 2006
6945278 Fully integrated aircraft cabin pressure control system valve Sep. 20, 2005
6708708 Pneumatic actuation control system and method of operation Mar. 23, 2004
6550495 Safety device for cutting off gas pipelines Apr. 22, 2003
6518918 Wireless assisted altitude measurement Feb. 11, 2003
6267131 Method of controlling pressure in a chamber, apparatus for the same, and exposure apparatus Jul. 31, 2001
6021519 Device for protecting against accelerations Feb. 8, 2000
5979481 Apparatus and method for vapor reduction for a fuel storage tank Nov. 9, 1999
5947144 Diaphragm actuated absolute pressure regulator Sep. 7, 1999
5865308 System, method and device for controllably releasing a product Feb. 2, 1999
5357949 Breathing protection installation for aircraft passengers Oct. 25, 1994
5351682 Breathing demand regulations Oct. 4, 1994
5199426 Aircraft aircrew G-responsive valve system for controlling breathing gas and suit-inflation Apr. 6, 1993
5170814 High altitude G-valve Dec. 15, 1992
5062441 Drain valve used in aircraft Nov. 5, 1991
4991392 Altitude-sensitive fuel flow control device Feb. 12, 1991
4903573 Explosion suppression system and composition for use therein Feb. 27, 1990
4903721 Fuel pressure regulator Feb. 27, 1990
4899740 Respirator system for use with a hood or face mask Feb. 13, 1990
4827964 System for metering of breathing gas for accommodation of breathing demand May. 9, 1989
4805658 Variable pressure regulating valve Feb. 21, 1989
4715561 Drain assembly for aircraft Dec. 29, 1987
4703625 Turbocharger control system Nov. 3, 1987
4687013 Flueric partial pressure sensor Aug. 18, 1987
4651764 Apparatus responsive to entry into space and method of operation thereof Mar. 24, 1987
4648397 Electronically compensated pressure dilution demand regulator Mar. 10, 1987
4622815 Pressure regulator Nov. 18, 1986
4619286 Elevation responsive automatic vehicle control system Oct. 28, 1986
4567909 Oxygen partial pressure controller for a pressure swing adsorption system Feb. 4, 1986
4506851 Drain apparatus for aircraft Mar. 26, 1985
4499914 Selector valve for an aircraft on board oxygen generation system with high pressure oxygen backup Feb. 19, 1985
4463774 Fuselage-mounted valve for condensate drainage and cabin-air pressurization Aug. 7, 1984
4462301 Bourdon tube actuator Jul. 31, 1984
4391290 Altitude sensing control apparatus for a gas turbine engine Jul. 5, 1983
4338265 Altitude compensation device Jul. 6, 1982

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