Safety lock for elevators
US7434614B2 · kind B2 · utility
7Cited by
15References
31Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 19, 2005 |
| Grant date | Oct 14, 2008 |
| Priority date | — |
| Expiry date | Feb 24, 2026 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B19/06
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An elevator having a safety lock is provided to prevent the inadvertent release of a tubular. In one embodiment, the elevator includes a body for supporting the tubular and a locking apparatus activatable by an upset portion of the tubular, the safety locking apparatus adapted to prevent the tubular handling apparatus from releasing the tubular when activated. In another embodiment, the elevator is provided with a secondary override locking device for the safety lock so that jarring operations may be performed using the elevator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.