Boom arm support lock
US4039093A · kind A · utility
29Cited by
7References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 30, 1976 |
| Grant date | Aug 2, 1977 |
| Priority date | — |
| Expiry date | Aug 30, 1996 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE02F3/388
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A boom arm safety lock including a pivotally-mounted boom arm and a fluid cylinder assembly for pivoting the arm up and down. A lock bar is pivotally mounted adjacent the boom arm for upwardly supporting the boom arm in the event the fluid in the cylinder assembly is exhausted, and the boom arm will therefore remain in the raised position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.