Lifting apparatus
US4456421A · kind A · utility
Inventor
Key dates
| Filing date | Sep 25, 1981 |
| Grant date | Jun 26, 1984 |
| Priority date | — |
| Expiry date | Sep 25, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S414/13
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
Lifting apparatus in combination with at least one substantially upright wall having an opening therein for providing access through the wall. The preferred combination comprises a vehicle, such as, a van (1), having a rear or side door opening therein, the lifting apparatus including a generally planar, load support portion (12) which is movable between a storage position (A,C) interior of the vehicle (1) and an operative position (B) exterior of the vehicle. In the operative position (B), the load support portion (12) lies in a generally horizontal plane substantially normal to that of the vehicle opening, with the support portion (12) being movable between its storage position (A,C) and its operative position (B) via an intermediate, inoperative position exterior of the vehicle (1). In this inoperative position, the load support portion (12) lies in a generally vertical plane substantially normal to that of the opening to provide substantially unobstructed access through the opening to the vehicle interior. The lifting apparatus preferably comprises a parallelogram-type raising and lowering portion (9,9') operated by a piston cylinder arrangement (8,8'), the load support portion…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.