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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 |
| 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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