Door lifting apparatus and method
US7008165B1 · kind B1 · utility
Inventor
Key dates
| Filing date | Apr 30, 2004 |
| Grant date | Mar 7, 2006 |
| Priority date | — |
| Expiry date | May 27, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/53961
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A door lifting apparatus includes a frame and a lift mechanism. The lift mechanism includes a slide assembly and a lever assembly. The slide assembly includes a vertical bar, a door support beam supporting a plurality of door holders, and a horizontal bar that are movable together vertically up and down relative to the frame as the lever assembly is moved between a lifted position, an intermediate position, and a lowered position. The vertical bar is associated with a cam plate secured to the frame such that the vertical bar, and the door support beam and door secured thereto, pivots as the lever assembly is moved between the lifted and the lower position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.