Drillship canopy
US4455958A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 11, 1982 |
| Grant date | Jun 26, 1984 |
| Priority date | — |
| Expiry date | Feb 11, 2002 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB63B35/4413
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A canopy system for deployment around the periphery of a vessel floating on a body of water is disclosed primarily for use in connection with drillships in Arctic waters. The disclosed canopy system includes (a) spaced apart structural frames extending outwardly from an inboard end to an outboard free end, the frames being movable between a first position in which a lower edge projects to a point adjacent to the surface of the water in which the vessel is floating, and a second position in which the lower edge projects below the surface of the water; (b) release latches for the two phase releasable securing of the inboard ends of the frames to the periphery of the vessel, including first and second phase release latches to allow frames to move from the first to the second positions, and to allow the frames to be jettisoned from the vessel, respectively; (c) an outer stressed skin supported on the outer surface of the frames; (d) an inner skin supported by the outer stressed skin; (e) a skirt depending from the outboard free end of the frames and projecting below the surface of the water in which the vessel is floating when the frames are in either their first or second positions; a…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.