Personnel lift devices

Details Personnel lift devices Personnel lift devices

1991-03-13

1993-04-20

Chin-Shue, Alvin C.

Fire escape, ladder, or scaffold

Automatic control

182148, 182113, 182 63, E04G 500

Patent

active

052034259

ABSTRACT:
The present invention provides personnel lift devices that include at least one of six design features. Each of the design features is discussed individually. The lift device includes an operator's cage assembly exhibiting ease of operator access and a safety enhancing interlocked design. A control mechanism, requiring the use of both hands to maneuver the controlled device, further enhances the safety of apparatus of the present invention. Interlocked outriggers provide enhanced structural stability and safety. A telescoping mast of extruded metal design includes a plurality of tee slots and/or sliding engagement during extension and retraction of the individual mast stages. A transfer mechanism releasably positionable at a plurality of heights and includes a bumper/roller assembly that is either fixed or freely movable, depending upon the portion of the device being transferred that is bearing the weight thereof.

REFERENCES:
patent: 3910370 (1975-10-01), Mecklenburg et al.
patent: 4467888 (1984-08-01), Heckling
patent: 4498556 (1985-02-01), Ganton
patent: 4787111 (1988-11-01), Pacek et al.

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