Safety latch lock
US9109409B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 22, 2012 |
| Grant date | Aug 18, 2015 |
| Priority date | — |
| Expiry date | Sep 26, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T403/595
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Embodiments of the invention relate to apparatus and methods for a secondary safety device for use on elevators utilized to move casing, tubing, sucker rods, or other circular tools or members in the oil and gas industry. In one embodiment, a secondary latch lock mechanism for an elevator having a primary safety latch is provided. The secondary latch lock mechanism comprises a base portion that is fixed to a body of the elevator, and a handle movably fixed to the base portion and a first gear device by a biasing member, wherein the handle is movable to a first position proximate to the primary safety latch and a second position that is spaced away from the primary safety latch.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.