Crane jib arrangement
US3972430A · kind A · utility
2Cited by
1References
1Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 10, 1973 |
| Grant date | Aug 3, 1976 |
| Priority date | — |
| Expiry date | Oct 10, 1993 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66C2700/062
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A crane jib includes a support, a base arm pivoted in the support, and a jib lever pivotally connected to the base arm. The jib lever supports at its free end a work tool and is oscillated on its support by two hydraulic jacks, the first of the jacks is placed at a point from the journal place of the base arm, while the second jack is placed adjacent the jib lever. The second hydraulic jack has its line of action approximately parallel to a line through the bearing points of the base arm, while its lower bearing point is disposed at a lower level than the bearing place of the base arm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.