Foldable machine for handling and lifting loads
US4895263A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 22, 1987 |
| Grant date | Jan 23, 1990 |
| Priority date | — |
| Expiry date | Oct 22, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66C23/348
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
The machine comprises, above a rotating frame, a mast which is foldable into two elements, a jib pivoted at the top of mast and a jib head member for the placing of loads, pivoted at the end of the jib. Straightening and holding in working position is assured by a unit comprising at least one counterbrace, a tie connected to a foot of the jib head member, a set of posts, a back holding cable, and a first double-acting jack associated with a system of connecting rods pivoted on the mast elements. Another double-acting jack connects the jib to the foot of the jib head member to make the machine work at different radii. The machine can be used for holding, lifting and placing loads on small-building construction sites.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.