Rolling door winch apparatus
US6234453A · kind A · utility
34Cited by
16References
19Claims
0Family size
Inventor
Key dates
| Filing date | Aug 12, 1999 |
| Grant date | May 22, 2001 |
| Priority date | — |
| Expiry date | Aug 12, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66C23/208
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
Winch apparatus for raising and holding a rolling steel door includes a wheeled base with telescoping members extending upwardly from the base. A hand cranked winch raises and lowers the telescoping members, while a reversible electric motor is used to power a separate winch for raising and lowering a load secured to an arm extending outwardly from an innermost telescoping member. The arm is disposed against a building when the apparatus is in position to raise the rolling steel door for its installation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.