Hawser chain seal assembly
US4679800A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 15, 1984 |
| Grant date | Jul 14, 1987 |
| Priority date | — |
| Expiry date | Oct 15, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T24/3902
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A hawser chain assembly and method for installation of its sealing element is disclosed. The assembly includes a housing adapted for connection in series with a hawser pipe of a marine vessel such as a semi-submersible drilling rig. The housing may be moved to an open position for installation or replacement of the sealing element, and a closed position to longitudinally surround and secure the sealing element. The sealing element has at least two semi-cylindrical elastomeric parts, each of which is adapted for placement partially about the hawser chain when the housing is in the open position. Each semi-cylindrical part has at least one inflatable bladder. A manifold is provided by which fluid pressure may be introduced to the bladders of the sealing element causing them to expand. The sealing element is restricted on its outer diameter by the closed housing causing the elastomeric material to move inwardly forming a sealing engagement with the chain.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.