Equi crane anti-tipping device
US4743893A · kind A · utility
10Cited by
8References
4Claims
0Family size
Inventors
Key dates
| Filing date | Jun 4, 1986 |
| Grant date | May 10, 1988 |
| Priority date | — |
| Expiry date | Jun 4, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66C23/90
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A crane anti-tipping device is provided that includes a warning alarm unit in the cab of the crane which includes two spaced switches each of which is responsive to a predetermined tilting of the crane to close an electric circuit to activate the warning alarm unit that the crane is at a dangerous degree of tilt. A modification provides a sensing device incorporated with a stabilizing foot which will activate an alarm in the crane cab that the ground bearing pressure of the stabilizing foot exceeds a preset magnitude.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.