Class 405/193 - With pressure equalization

Subclass of Class 405 - Hydraulic and earth engineering
Definition: Method or apparatus wherein the means with which personnel
No. of patents: 30
Last issue date: 04/10/2012

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Number	Title	Issue Date
8152413	Method of and apparatus for bouyancy compensation for divers An improved buoyancy compensation device having a lesser change in buoyancy with depth than conventional buoyancy compensation devices which use ambient pressure bladders is disclosed. The improved device comprises one or more elastic members that, throughout the wo...	04/10/2012
7371142	Buoyancy compensator device, particularly for divers A buoyancy compensator device for divers has an expandable air chamber and at least two outlets, one arranged in an upper region and one arranged in a lower region. A manifold functionally connects the expandable air chamber and the outlets, by means of a control va...	05/13/2008
7311469	Floating lowering and lifting device A floating lowering and lifting device (1) includes a floating structure (2) and a lifting unit (3) lowerable from the floating structure (2) towards the sea bed, the lifting unit (3) having a chamber (5) with at least one g...	12/25/2007
7293311	Method of making a multilayered mattress component A method of making a mattress component includes providing a first layer of a first material. Mating patterns are shaped in a surface of the first layer in areas corresponding to a position where hips and shoulders of the user will rest on a mattress. The mating pat...	11/13/2007
7174844	Simulator and method for performing underwater submarine escape training The simulator of the present invention comprises a submersible structure to be used in a body of water, for instance a pool. This structure comprises a bell defining a main chamber. An escape tower is provided over the bell. This escape tower defines an escape chamb...	02/13/2007
7073463	Apparatus for an underwater terrarium An underwater terrarium capable of being submerged in an aquarium. The interior of the terrarium is sealed, so it may be submerged in a tank. The terrarium has a pair of air tubes for air intake and exhaust. The intake can be connected to a standard aquarium aerator...	07/11/2006
6923177	Underwater breathing device A versatile underwater breathing device which comprises, a pressurized gas reservoir or tank (21), a buoyancy bladder (72), bladder inflation control means (76), a breathing regulator (32) in communication with the gas reservoir; and a fl...	08/02/2005
6257275	Pressure reducing valve A pressure regulator for breathing apparatus controlled by a diaphragm, piston or bellows having one face exposed to a reference pressure which is automatically maintained at a level substantially the same as ambient pressure by means of a metering valve ...	07/10/2001
5749679	Method and device for letting out gas from life jackets of divers A method and a device for letting out gas from a life jacket for divers, the device being adapted to be in gas flow communication with an interior of the life jacket. Gas is drawn into the device from the interior of the life jacket, compressed in the dev...	05/12/1998
5707177	Buoyancy control device for divers A buoyancy control device for divers includes a plurality of inflatable members each adapted to be inflated to a predetermined maximum volume, or to be deflated, and a fluid distributor for selecting the inflatable members to be inflated and to be deflate...	01/13/1998
5201611	Pressure equalizer for use at deep sea A pressure equalizer for use for storing, generating and dispensing gas from substantially thin walled tanks at great depth beneath the sea has a gas generating tank contains a low-temperature, liquified gas which upon the application of heat generates a ...	04/13/1993
5098219	Mobile submersible caisson for underwater oil-well drilling and production A mobile submersible caisson is employed to drill for and recover petroleum products from subsea wells and to deliver the products to shore or to vessels at the well site. The well drilling technique applies to water depths beyond 300 ft. and in areas whe...	03/24/1992
5067855	Casing for containing cameras, videocameras, flashlights portable radios and other articles which can be used in scuba diving Disclosed is an improved casing for containing cameras, videocameras, flashlights, portable radios and other articles which can be used in scuba diving. It is designed to cause the inner pressure of the casing to vary and balance with the surrounding wate...	11/26/1991
4903628	Pressure equalizer A pressure equalizing cabinet for instruments intended to be submerged in water is described. The device includes a source of compressed air and a piston in a cylinder. One side of the piston is in communication with the interior of the cabinet and the ot...	02/27/1990
4706596	Actuator usable in a fluid under high pressure An actuator usable in a first fluid under a high pressure, e.g. on board a submarine operating at great depths to release or jettison ballast and wherein the first fluid is external to the submarine, comprises a plunger which is mobile by means of a sprin...	11/17/1987
4292914	Method and apparatus for facilitating underwater work on ship hulls and like objects This invention relates to an apparatus for facilitating working on especially horizontal underwater portions of ship hulls, pontoons and other floating objects. The novel feature resides in that the apparatus comprises a screen structure adapted to be tig...	10/06/1981
4274405	Method for varying the ambient pressure in a vessel The ambient pressure of the environment of an individual within a vessel is varied between an upper and lower pressure value by providing the vessel with a mass of gas sufficient to fill at least a substantial part of the vessel, and varying the quantity ...	06/23/1981
4258794	Underwater completion habitat A submergible, underwater well completion habitat and a method of employing the same in the completion of wells at extended depths. The well completion habitat may be attached to an underwater well platform and maintained at a pressure of sufficient value...	03/31/1981
4229120	Submarine pipeline alignment rig A submarine pipeline alignment rig includes a working section and a detachable truss section having a fixed fulcrum for engagement with a submerged conduit section. The rig also includes a vertically movable housing which provides an encapsulated underwat...	10/21/1980
4187796	Specific gravity equalizer system A system for varying specific gravity of a submersible or any immersed obt under a pressurized environment which includes a compressible piston designed to collapse a certain amount proportional to the submersible's depth so that the specific gravity of ...	02/12/1980
4144801	Method and apparatus for transporting and housing tunnel workers active in high pressure environments A method and apparatus for increasing the safety and productivity of tunnel workers active in high pressure environments is disclosed. The workers are housed at an intermediate pressure over a "work week" of at least several days and are transported betwe...	03/20/1979
4137585	Buoyancy compensator and inflation system The following disclosure discloses a buoyancy compensator having an inflatable bladder at the front and rear of a diver, so that adequate buoyancy is provided with respect to the diver's entire torso. The buoyancy compensator has a strap and harness arran...	02/06/1979
4117688	Apparatus for working under water A capsule for enclosing a sub-sea installation part is intended to be left water-filled and thus means for sensing oil or gas leaks from the part is disposed in the upper part of the capsule to where such leakage will float....	10/03/1978
4109601	Vessel for working under water A vessel for working under water comprising a substantially spherical residence chamber with an atmospheric pressure therein and accommodating necessary monitoring apparatus for controlling working tools and devices arranged on the outside of the residenc...	08/29/1978
4103500	Apparatus for connecting the ends of submerged pipes The ends of submerged pipes are connected using a receiver provided with two apertures through which the pipe ends extend, the receiver being adapted to form a watertight enclosure with an intervention unit and housing means for closing the ends of the pi...	08/01/1978
4090366	Transit capsules A transit capsule for providing operator access to a sub-sea installation part in a capsule on a sea-bed, the two capsules having complementary means to form a conjunction capsule, has means selectively connecting an expansion vessel in the transit capsul...	05/23/1978
4068491	Method and apparatus for connecting the ends of submerged pipes The ends of submerged pipes are connected using a receiver provided with two apertures through which the pipe ends extend, the receiver being adapted to form a watertight enclosure with an intervention unit and housing means for closing the ends of the pi...	01/17/1978
3996870	Arrangement in or relating to a vessel for performing diving operations by means of a diving bell A vessel for performing diving operations by means of a diving bell capable of being raised and lowered from the vessel, includes a docking chamber for the diving bell which is arranged at such a water depth that it will be always positioned below the wat...	12/14/1976
3991583	Method of providing an underwater enclosure An inflatable underwater structure for providing an artificial environment around a work area, for example, at the sub-sea base of an off-shore oil platform, permitting such work as welding and the like; the structure is made up of one integral sheet of m...	11/16/1976
3968656	Marine structure with hydraulic tensioner A tension leg marine structure or working platform is floatably positioned above an offshore working site, being maintained in place by a plurality of tension cables that connect to anchors at the sea floor. A riser which extends between the structure and...	07/13/1976

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Class 405/193 - With pressure equalization