Pull-out diaphragm seal for hollow tubes
US4376597A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 4, 1981 |
| Grant date | Mar 15, 1983 |
| Priority date | — |
| Expiry date | Mar 4, 2001 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE02B17/0013
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A diaphragm seal assembly for large tubes such as used as supporting legs in offshore platforms and pile drivers in underwater environments, with the diaphragm seal closure constructed to resist loads retained in such manner as to be nearly completely removed by upward tension pull on a pull-out cable. The diaphragm seal assembly is retained between rings welded inside a tubular member by a split ring forced apart to a retaining diameter by a removable key. Pull on a cable removes the key allowing the split ring to return to its initial smaller diameter size small enough to be removed up out of the tube along with the diaphragm closure member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.