Mechanical seat lock
US5794470A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 25, 1996 |
| Grant date | Aug 18, 1998 |
| Priority date | — |
| Expiry date | Jun 25, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60N2/23
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
The mechanical lock has an elongated housing. A pair of end bushings mounts in the housing, and a rod translates through the end bushings and at least partially through the housing. A pair of coiled locking springs within the housing are around the rod and between the end bushings. One end of each locking spring is fixed within the housing, and the other end of each locking spring is free. The normal inside diameter of each locking spring is less than the outside diameter of the rod so that the locking springs secure the rod. A handle can uncoil the free end of each locking spring to increase their inside diameter and release the rod. A wedge bushing mounts in the housing between the locking springs. The face on each end bushing against its respective locking spring is at an angle, and the wedge bushing also has an angled face on the other side of each spring. Therefore, when the rod and housing are loaded with respect to each other, the angled face of one bushing cants one locking spring, and an angled face of the wedge bushing cants the other locking spring.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.