Apparatus for releasing a rack chock of a jack-up rig
US6231269A · kind A · utility
17Cited by
7References
28Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 5, 1999 |
| Grant date | May 15, 2001 |
| Priority date | — |
| Expiry date | Mar 5, 2019 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE02B17/0818
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A "frozen" rack chock of a jack-up rig is released by a moving force imparted on the rack chock by a worm gear assembly. The worm gear assembly has a tooth wheel with a plurality of teeth and a worm gear member provided with a worm thread that engages the teeth for transmitting rotational force from a drive motor to the tooth wheel. A shaft of the tooth wheel is operationally connected to the rack chock to cause disengagement of the rack chock from the contact surface of a leg chord when the tooth wheel is rotated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.