Bottom brace for crane
US4102094A · kind A · utility
16Cited by
15References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 26, 1975 |
| Grant date | Jul 25, 1978 |
| Priority date | — |
| Expiry date | Sep 26, 1995 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B15/04
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
There is disclosed herein a portable crane having a boom and lower brace supporting an elongated lead adapted to carry a pile driver, drill or other tool. The outer end of the brace has a capstan drive connected to a lead supporting line whereby the brace is movable vertically independently of the lead.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.