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Class Information
Number: 137/81.2
Name: Fluid handling > Ambient condition change responsive > Underwater
Description: Apparatus in which control of a flow of fluid is responsive to a variation in a condition of, or in an environment beneath the surface of a body of water.

Patents under this class:
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Patent Number Title Of Patent Date Issued
8711002 Monitoring of undesirable fluid ingress into subsea control modules Apr. 29, 2014
8464745 Constant volume pressure compensator Jun. 18, 2013
8427336 Monitoring of undesirable fluid ingress into subsea control modules Apr. 23, 2013
8327875 Chemical-injection management system Dec. 11, 2012
8274245 Actuating device and method of operating an actuating device Sep. 25, 2012
8196581 Mouthpiece supply valve Jun. 12, 2012
8196598 Actuator for the actuation of submarine devices Jun. 12, 2012
8087424 Subsea valve actuator apparatus Jan. 3, 2012
8051872 Subsea equipment Nov. 8, 2011
7921866 First stage pressure regulator for a two-stage underwater breathing apparatus Apr. 12, 2011
7686032 First stage scuba diving regulator having an intermediate pressure spring protected from ice-induced blockage Mar. 30, 2010
7578312 Hydraulic coupling member with displaced water compensation system Aug. 25, 2009
7520291 Pressure-compensated, subsea chemical injection valve Apr. 21, 2009
7331345 Demand regulator protective bellows Feb. 19, 2008
7108006 Subsea actuator assemblies and methods for extending the water depth capabilities of subsea actuator assemblies Sep. 19, 2006
7025093 Polyurethane elastomer gel insulating composition and use thereof Apr. 11, 2006
6964304 Technique for maintaining pressure integrity in a submersible system Nov. 15, 2005
6725861 Valve for underwater aqualung supplying devices Apr. 27, 2004
6273019 Regulated pressurized system and pressure regulator for use in an ambient fluid environment, and method of pressure regulation Aug. 14, 2001
6148858 Pressure balanced couplings Nov. 21, 2000
6125874 Gate valve having fail safe actuator Oct. 3, 2000
5826658 Riser fill-up valve Oct. 27, 1998
5810041 Pressure regulator Sep. 22, 1998
5697396 Air feed valve and exhaust valve to be attached to an underwater suit Dec. 16, 1997
5592962 Compressed gas release system Jan. 14, 1997
5542446 Scuba buoyancy control valve Aug. 6, 1996
5507308 Gas pressure regulator Apr. 16, 1996
5469887 Hydraulic coupling with pressure equalizing valve Nov. 28, 1995
5357999 Subsea control systems and apparatus Oct. 25, 1994
5191317 Low air warning system for scuba divers Mar. 2, 1993
5184609 Divers first stage adjustable regulator Feb. 9, 1993
5036660 Dual actuation harness fitting release Aug. 6, 1991
5007364 Gas control valves and apparatus for controlling buoyancy in water Apr. 16, 1991
4951698 Process and devices for maintaining the gas contained in a submerged enclosure in pressure equilibrium with the outside Aug. 28, 1990
4832126 Diverter system and blowout preventer May. 23, 1989
4800373 Low pressure warning device for scuba divers Jan. 24, 1989
4777800 Static head charged hydraulic accumulator Oct. 18, 1988
4674429 Underwater buoyancy apparatus Jun. 23, 1987
4650151 Subsea gate valve actuator with external manual override and drift adjustment Mar. 17, 1987
4625759 Gas reclaim back pressure regulator Dec. 2, 1986
4621655 Marine riser fill-up valve Nov. 11, 1986
4527582 Depth responsive gas control device Jul. 9, 1985
4442835 Deep diving breathing systems Apr. 17, 1984
4396032 Safety underwater pressure regulator Aug. 2, 1983
4362154 Processes and devices for regulating the oxygen partial pressure of the gas mixture of the respiratory circuit of a diver Dec. 7, 1982
4294284 Fail-safe, non-pressure locking gate valve Oct. 13, 1981
4229832 Diver's suit excess gas exhaust valve Oct. 28, 1980
4230140 Environmental first stage scuba regulator Oct. 28, 1980
4226257 Scuba regulator Oct. 7, 1980
4204552 Dual speed fluid control apparatus May. 27, 1980

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