Dual locking linear mechanical lock for high loads
US5819881A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 24, 1995 |
| Grant date | Oct 13, 1998 |
| Priority date | — |
| Expiry date | Jul 24, 2015 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60N2/23
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A linear mechanical lock comprises an elongated housing. A rod having a first end inserted into the housing and a second end extending out of the housing. A first lock comprising a locking spring having an end fixed in the housing and extending around a portion of the rod. The normal inside diameter of the locking spring is less than the rod's outside diameter so that the spring grips the rod. A moveable handle engages the locking spring, and movement of the handle uncoils the locking spring to release the rod. A second lock comprises a collet having at least one jaw around the rod within the housing. The jaw normally is out of the engagement with the rod. The collet has a first region having an inside diameter around the normal position of the jaw to provide sufficient room for the jaw to be out of engagement with the rod. The collet has a second region adjacent to the first region with an inside diameter having insufficient clearance to provide sufficient room for the jaw to be out of engagement with the rod. A bushing in the housing has an end adjacent to the jaw for pushing the jaw into the second region to force the jaw against the rod.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.