Underwater tool
US6752569B2 · kind B2 · utility
9Cited by
14References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 16, 2003 |
| Grant date | Jun 22, 2004 |
| Priority date | — |
| Expiry date | Jan 16, 2023 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L55/132
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
To obviate the need for hydraulic lines, from the surface, external water pressure is used to compress a seal member and form a seal with a surrounding pip. Valve is opened at depth to allow water to act on a piston, moving it within a chamber so as to compress the seal member. A second valve may be opened so that water acts on the opposite end of the piston to release the seal member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.