Trip mechanism for de-activating elevator platforms

Details Trip mechanism for de-activating elevator platforms Trip mechanism for de-activating elevator platforms

1984-02-06

1985-12-03

Skaggs, H. Grant

Elevator, industrial lift truck, or stationary lift for vehicle

Stationary lift for roadway vehicle or required component...

Having specific drive means for support

187 98, 200 6144, B66B 100

Patent

active

045561290

ABSTRACT:
An elevator mechanism device having first and second platforms mounted in a frame for movement relative to one another wherein a nip is formed between a lower edge of the first platform and an upper edge of the second platform as they move toward one another and wherein an electrically operated control circuit is provided for controlling the movement of the platforms relative to one another, the improvement of a flexible skirt extending below the lower edge of said first platform across the width of the nip whereby during movement of the platform to close the nip, a trip will be engaged by and deflected by any object which may project into the nip, a circuit breaker operable to de-activate the control circuit, the trip communicating between each end of the flexible skirt and the circuit breaker to activate the circuit breaker to de-activate control circuit when the trip is deflected to an extent less than that required to permit the object to be clamped between the first and second platforms.

REFERENCES:
patent: 922607 (1909-05-01), Martineau
patent: 1486027 (1924-03-01), Mayotte
patent: 3275170 (1966-09-01), MacRae et al.
patent: 3801767 (1974-04-01), Marks
patent: 4002231 (1976-01-01), Doty
patent: 4091906 (1978-05-01), Clarke
patent: 4301621 (1981-11-01), Houweling

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