Cableless cage elevator

Elevator – industrial lift truck – or stationary lift for vehicle – Stationary lift for roadway vehicle or required component... – Having specific drive means for support

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Details

74342, B66B 902

Patent

active

040519236

ABSTRACT:
A cage elevator of the cableless type which is particularly simple, safe and reliable; which forms a simple, compact and sturdy frame, cage, drive units and threaded cylinder sections combination; which may be easily extended to any height without alteration nor displacement of the other components; which has positive, neat and strong gear engagement in particular in internally threaded posts, thus offering the advantage to use square threads for self-braking; which includes a simple and convenient manual drive assembly to safely reach an exit door upon electrical power failure; and which includes guideways positively guiding the elevator cage laterally for reduced wear on the threads directly associated with the vertical travel. The cylinder sections are slotted and a frame carries the cage, a pair of drive units and gear drives operatively connected to worms in the threaded slotted cylinder sections, the cylinder sections are fitted in end-to-end relation in upright channels and each cylinder section can be removed from the channel independently of the other cylinder sections for ease of maintenance.

REFERENCES:
patent: 47761 (1865-05-01), Willard
patent: 679142 (1901-07-01), Farmer
patent: 790137 (1905-05-01), Karrer
patent: 828029 (1906-08-01), Jackson
patent: 920630 (1909-05-01), Ocumpaugh
patent: 1392078 (1921-09-01), Ouillett
patent: 1852134 (1932-04-01), Sweet
patent: 2724289 (1955-11-01), Wight

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