Lifting mechanisms especially lifting platform

Details Lifting mechanisms especially lifting platform Lifting mechanisms especially lifting platform

1980-03-07

1982-03-16

Watson, Robert C.

Implements or apparatus for applying pushing or pulling force

Multiple lifters

B66F 714

Patent

active

043197388

ABSTRACT:
A lifting mechanism with a lifting platform, a lifting column supporting the platform, a threaded catch rod attached to the column, and an easily workable nut mounted on the rod and surrounded by a housing forming part of the platform. The housing engages the nut through a ball bearing and spring so that the nut rotates and moves up and down with the platform during normal operation. If the platform moves downward rapidly the spring is compressed and a projection on the housing engages the nut to stop downward movement of the platform.

REFERENCES:
patent: 3687234 (1972-08-01), Gendreau
patent: 3707930 (1973-01-01), Yindra et al.
patent: 4022428 (1977-05-01), Mantha
patent: 4076216 (1978-02-01), Nussbaum

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