Lifting apparatus for heavy folding doors

Details Lifting apparatus for heavy folding doors Lifting apparatus for heavy folding doors

1983-10-14

1988-09-20

Levy, Stuart S.

Implements or apparatus for applying pushing or pulling force

Apparatus for hauling or hoisting load, including driven...

Device includes rotatably driven, cable contacting drum

254 47, 254357, B66D 114, B66D 136

Patent

active

047719885

ABSTRACT:
A single, telescopic tubular steel pole is supported by an elongated steel channel base having rubber wheels on each end. The pole is leaned and supported against the top of a door opening in a building by means of a removable top frame having a longitudinal angle steel member reinforced by diagonal struts on other angle iron members which form a longitudinal channel welded to the top of the pole. A winch system employs a cable which passes around two pulleys on the top member to support a heavy steel, folding door.

REFERENCES:
patent: 301381 (1884-07-01), McCreery
patent: 715747 (1902-12-01), Bock
patent: 783672 (1905-02-01), Bock
patent: 1148382 (1915-07-01), Hawkins
patent: 2364547 (1944-12-01), Olsen
patent: 2604303 (1952-07-01), Grady
patent: 2859881 (1958-11-01), Coryell
patent: 2985430 (1961-05-01), Greenwood
patent: 3340960 (1967-09-01), Wilson

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