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Class Information
Number: 405/193
Name: Hydraulic and earth engineering > Diving > With pressure equalization
Description: Method or apparatus wherein the means with which personnel may carry on the underwater operation comprises an enclosure confining a gaseous environment which is maintained at a pressure equal to or greater than the surrounding water pressure to prevent ingress of water through an opening.










Patents under this class:

Patent Number Title Of Patent Date Issued
8464745 Constant volume pressure compensator Jun. 18, 2013
8414241 Device and method for lowering or lifting a load in water Apr. 9, 2013
8251614 Electrical power system for a subsea system Aug. 28, 2012
8152413 Method of and apparatus for bouyancy compensation for divers Apr. 10, 2012
7311469 Floating lowering and lifting device Dec. 25, 2007
6257275 Pressure reducing valve Jul. 10, 2001
5749679 Method and device for letting out gas from life jackets of divers May. 12, 1998
5707177 Buoyancy control device for divers Jan. 13, 1998
5201611 Pressure equalizer for use at deep sea Apr. 13, 1993
5098219 Mobile submersible caisson for underwater oil-well drilling and production Mar. 24, 1992
5067855 Casing for containing cameras, videocameras, flashlights portable radios and other articles which can be used in scuba diving Nov. 26, 1991
4903628 Pressure equalizer Feb. 27, 1990
4706596 Actuator usable in a fluid under high pressure Nov. 17, 1987
4292914 Method and apparatus for facilitating underwater work on ship hulls and like objects Oct. 6, 1981
4274405 Method for varying the ambient pressure in a vessel Jun. 23, 1981
4258794 Underwater completion habitat Mar. 31, 1981
4229120 Submarine pipeline alignment rig Oct. 21, 1980
4187796 Specific gravity equalizer system Feb. 12, 1980
4144801 Method and apparatus for transporting and housing tunnel workers active in high pressure environments Mar. 20, 1979
4137585 Buoyancy compensator and inflation system Feb. 6, 1979
4117688 Apparatus for working under water Oct. 3, 1978
4109601 Vessel for working under water Aug. 29, 1978
4103500 Apparatus for connecting the ends of submerged pipes Aug. 1, 1978
4090366 Transit capsules May. 23, 1978
4068491 Method and apparatus for connecting the ends of submerged pipes Jan. 17, 1978
3996870 Arrangement in or relating to a vessel for performing diving operations by means of a diving bell Dec. 14, 1976
3991583 Method of providing an underwater enclosure Nov. 16, 1976
3968656 Marine structure with hydraulic tensioner Jul. 13, 1976











 
 
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