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...When G.G. Hubbard learned of his future son-in-law's invention, he called it "only a toy." His daughter was engaged to a young man named Alexander Graham Bell.
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| Number | Title | Issue Date |
| 8051872 | Subsea equipment A subsea equipment (1) used for natural gas or crude oil production, such as a subsea actuator (2) for a valve, a restrictor or the like, a control module or other means, comprises at least an oil-filled first component (3) and a compensator uni... | 11/08/2011 |
| 7921866 | First stage pressure regulator for a two-stage underwater breathing apparatus A first stage pressure regulator for a two-stage underwater breathing apparatus, comprises a second movable wall (16, 18) for separating a balance chamber (10) from an ambient exposed chamber (17) . The second movable wall is formed by a disk-sh... | 04/12/2011 |
| 7520291 | Pressure-compensated, subsea chemical injection valve A backpressure-protected valve suitable for subsea well treatment chemical injection applications includes an improved gate valve, a check valve and a pressure compensator responsive to ambient hydrostatic pressure. The check valve may comprise a poppet valve in a d... | 04/21/2009 |
| 7331345 | Demand regulator protective bellows A self contained breathing apparatus (SCBA) served by a source of breathing gas with a mask and a demand regulator connected to the mask. The regulator has a flexible diaphragmatic member having a side exposed to pressure differentials to cause a valve mechanism to ... | 02/19/2008 |
| 7108006 | Subsea actuator assemblies and methods for extending the water depth capabilities of subsea actuator assemblies A hydraulic pressure compensation system for valve actuator assemblies is described having particular application for subsea wellhead installations. The compensation system includes at least one valve actuator assembly having a housing that retains a reciprocable pi... | 09/19/2006 |
| 7025093 | Polyurethane elastomer gel insulating composition and use thereof The invention relates to the use of a thermally insulating composition in the form of crosslinked polyurethane elastomer gel, obtained by reacting at least one polyol and at least one polyisocyanate in the presence of at least one inert organic filler, for the therm... | 04/11/2006 |
| 6964304 | Technique for maintaining pressure integrity in a submersible system A technique for maintaining pressure integrity within a submersible system. The system utilizes a pressure housing with an internal component, such as a valve. The internal component is actuated by an external actuator via an actuator stem. A seal region is position... | 11/15/2005 |
| 6273019 | Regulated pressurized system and pressure regulator for use in an ambient fluid environment, and method of pressure regulation A regulated pressurized system for use in an ambient fluid environment such as water and for mounting to an underwater vehicle, having at least one compressed fluid supply such as air in a tank. A pressure regulator is connected by tubing to the air tank,... | 08/14/2001 |
| 6148858 | Pressure balanced couplings A sub-sea coupling comprises a male probe coupler and a female receiver coupler containing mutually engageable poppet valves which have intermediate valve heads between nose and shank portions which seal with respect to the respective couplers. Each valve... | 11/21/2000 |
| 6125874 | Gate valve having fail safe actuator There are disclosed three embodiments of a gate valve having a fail safe actuator which is especially useful in a subsea environment at considerably depth below water surface. The gate is urged to open position by control pressure and is moved to closed p... | 10/03/2000 |
| 5826658 | Riser fill-up valve A fill-up valve is provided for a riser having a longitudinal axis that is connected at one end to a subsea wellhead and at the other end to a platform of an offshore oil or gas well. The fill-up valve is formed from a gate valve that mounts to an exterio... | 10/27/1998 |
| 5810041 | Pressure regulator A pressure regulator for the first reduction stage of a two-stage aqualung. The regulator includes an inlet passage connected to a supply of breathable gases at high pressure; an outlet passage for the gases leading to a second stage regulator; a valve be... | 09/22/1998 |
| 5697396 | Air feed valve and exhaust valve to be attached to an underwater suit Disclosed is an improved air feed valve to be attached to an underwater suit, responsive to a water pressure P measured at a selected point A of the underwater suit for permitting air to flow to the inside of the underwater suit at a predetermined flow ra... | 12/16/1997 |
| 5592962 | Compressed gas release system A compressed gas release system including a compressed gas source, the gas within the source is released as a response to a combination of a predetermined threshold external pressure and a defined chemical environment. In particular, the compressed gas re... | 01/14/1997 |
| 5542446 | Scuba buoyancy control valve A buoyancy control valve assembly for maintaining a diver's neutral buoyancy as the diver descends or ascends by automatically admitting air to or releasing air from the diver's buoyancy compensator. The assembly includes a valve body having a reference a... | 08/06/1996 |
| 5507308 | Gas pressure regulator The regulator comprises a piston (13) comprising a hollow rod (21) extending through an internal partition (6) delimiting a high pressure chamber (3) and an internal chamber (5) and coacting with a valve seat (24) disposed in the high pressure chamber (3)... | 04/16/1996 |
| 5469887 | Hydraulic coupling with pressure equalizing valve A hydraulic coupling having a pressure-equalizing valve in the female coupler body is disclosed. A passage extends between the central bore or receiving chamber and the external surface of the female member. A valve in the passage allows sea water to flow... | 11/28/1995 |
| 5357999 | Subsea control systems and apparatus A subsea actuator for operating a valve (20) or the like comprises a movable wall member (19) fixed to an axially slidable stem and separating a pressure chamber (2) from a space (3) which is subjected to the hydrostatic pressure of ambient seawater. A se... | 10/25/1994 |
| 5191317 | Low air warning system for scuba divers A low air warning system for scuba divers in which a pressure switch and an electromagnetic transmitter are positioned at or near the high pressure air supply tank of the scuba diver and a corresponding electromagnetic receiver is positioned on the diver'... | 03/02/1993 |
| 5184609 | Divers first stage adjustable regulator An adjustable regulator of the type having fluid coupling oil within a cavity exposed to ambient pressure and overlying a diaphragm which operates based upon imbalances of said ambient pressure and an intermediate pressure zone on the other side of said d... | 02/09/1993 |
| 5036660 | Dual actuation harness fitting release Aviator harness fittings are pneutically actuated by a central device including a pressurized gas cartridge. A firing pin may mechanically pierce the cartridge or automatic ballistic actuation of the firing pin may be accomplished by SEA WARS gas-generati... | 08/06/1991 |
| 5007364 | Gas control valves and apparatus for controlling buoyancy in water A gas control valve (802) has an inlet needle jet (812) and an outlet (816), the communication between which is controlled by a valve member (808) carried by a rod (807) connected to a diaphragm (804) which divides a chamber (806), open to ambient pressur... | 04/16/1991 |
| 4951698 | Process and devices for maintaining the gas contained in a submerged enclosure in pressure equilibrium with the outside This invention relates to a device for maintaining the gas contained in a submerged enclosure in pressure equilibrium with the outside, comprising a plurality of deformable bags which are immersed at the same time as said enclosure which are filled with g... | 08/28/1990 |
| 4832126 | Diverter system and blowout preventer A system is disclosed which may alternatively be used as a diverter or as a blowout preventer for a drilling rig. The system comprises a blowout preventer attached above a spool having a hydraulically driven sleeve/piston. An outlet flow passage in the sp... | 05/23/1989 |
| 4800373 | Low pressure warning device for scuba divers A low pressure warning device for use by scuba divers attaches to a fitting on the high pressure stage of the air tank. The warning device has both audible and visual indicators contained in a housing attached adjacent the air pressure gauge. A two stage ... | 01/24/1989 |
| 4777800 | Static head charged hydraulic accumulator A hydraulic accumulator for subsea use, which charges itself as it is lowered to the operating depth. The seawater and hydraulic fluid operate against unbalanced pistons (36, 52) with low pressure gas (42) therebetween.... | 10/18/1988 |
| 4674429 | Underwater buoyancy apparatus A device for venting gas from an expansible gas chamber (lifejacket, lifting bag, etc.) of an underwater buoyancy apparatus. The device comprises a monitoring device which monitors the rate of ascent of the expansible gas chamber and provides a control si... | 06/23/1987 |
| 4650151 | Subsea gate valve actuator with external manual override and drift adjustment A hydraulically operated actuator for a sliding gate valve designed for use in a subsea environment. The actuator includes a manual override system that functions independently of the actuator's hydraulic piston and return spring, an externally accessible... | 03/17/1987 |
| 4625759 | Gas reclaim back pressure regulator A divers two-stage gas reclaim back pressure regulator is described having mutually concentric side-by-side annular first and second chambers interconnected by a central tubular duct one end of which is cooperable with a first stage diaphragm to form a fi... | 12/02/1986 |
| 4621655 | Marine riser fill-up valve A marine riser safety valve is disclosed which, when placed in series with a deep water marine riser string, prevents collapse of riser pipe when inadvertent gas influx replaces the drilling fluid column. A cylindrical body is provided having a depression... | 11/11/1986 |
| 4527582 | Depth responsive gas control device A device for automatically opening a gas supply valve when the device reaches a predetermined depth, e.g. when diving, has a gas reservoir, a pressure sensing means providing a control signal when the ambient pressure exceeds that of the gas reservoir, an... | 07/09/1985 |
| 4442835 | Deep diving breathing systems A deep diving breathing system in which a breathable gas mixture is circulated through a diving helmet by a push-pull pump includes an inlet flow control valve, an outlet gas flow regulator valve, and a bleed valve. The bleed valve operates in response to... | 04/17/1984 |
| 4396032 | Safety underwater pressure regulator Provided is an underwater pressure regulator comprising a high and a low pressure chamber, an inlet to the high pressure chamber and at least one outlet port associated with the low pressure chamber. A valve assembly including a valve seat is interposed b... | 08/02/1983 |
| 4362154 | Processes and devices for regulating the oxygen partial pressure of the gas mixture of the respiratory circuit of a diver Regulation of the oxygen partial pressure in the closed respiratory circuit of a diver. A sample of the gas mixture of the circuit is continuously taken and is passed into the monitor chamber (2) where its oxygen partial pressure is measured and an electr... | 12/07/1982 |
| 4294284 | Fail-safe, non-pressure locking gate valve A fail-safe non-pressure locking valve, actuated by hydraulic controls responsive to ambient sea pressure, disposed over 1000 feet below the surface on a submerged pipeline controlling the flow of fluids therethrough. The valve includes a housing having a... | 10/13/1981 |
| 4230140 | Environmental first stage scuba regulator A first stage scuba regulator operates to supply breathable air at a pressure of say, about 125 psi above ambient to a second stage demand regulator. The first stage regulator includes a piston subjected on one side to ambient pressure, and on the other t... | 10/28/1980 |
| 4229832 | Diver's suit excess gas exhaust valve A valve for controlling venting of excess gas from a diving suit includes a alve body housing first and second rubber check valves arranged in series. A control knob is rotatable on the valve body to selectively open or close outlet ports for venting gas f... | 10/28/1980 |
| 4226257 | Scuba regulator This invention relates to pressure regulators used in scuba diving wherein a pressure sensing means is employed to actuate an associated valve member for controlling pressure in the regulator. Specifically, the instant invention relates to that portion of... | 10/07/1980 |
| 4204552 | Dual speed fluid control apparatus A dual speed fluid control apparatus is provided which includes a valve b having a high pressure passageway and a low pressure passageway extending vertically therethrough in a spaced apart relationship. A top portion of the passageways is interconnected... | 05/27/1980 |
| 4161947 | Divers exhaust valve The invention provides an exhaust valve comprising a valve body, an inlet duct in the valve body for receiving gas to be exhausted through the valve, an exhaust duct in the valve body for exhausting the said gas from the valve, and a valve member subject ... | 07/24/1979 |
