Lifting apparatus including overload sensing device

Details Lifting apparatus including overload sensing device Lifting apparatus including overload sensing device

1996-05-13

1997-09-02

Matecki, Katherine

Implements or apparatus for applying pushing or pulling force

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

Device includes rotatably driven, cable contacting drum

254270, B66D 148

Patent

active

056623119

ABSTRACT:
A load lifting apparatus comprising: a frame; a load engaging mechanism for engaging a load having a weight; a hoist mechanism for raising the load engaging mechanism, the hoist mechanism being mounted on the frame and including a member supporting the load engaging mechanism during lifting of the load, the member having therein an aperture; a sensor disposed in the aperture for detecting a force exerted by the load engaging mechanism on the member, the sensor providing a variable output indicative of the magnitude of the force; and a control for disabling the hoist mechanism when the output reaches a first predetermined value corresponding to the maximum load of the load lifting apparatus.

REFERENCES:
patent: 2434138 (1948-01-01), Adams
patent: 3203672 (1965-08-01), Santos
patent: 3223385 (1965-12-01), Murakami
patent: 3733450 (1973-05-01), Ridge et al.
patent: 3889929 (1975-06-01), Pamer
patent: 4042213 (1977-08-01), Schreyer et al.
patent: 4305513 (1981-12-01), Boelz
patent: 4530245 (1985-07-01), Jacobson
patent: 4953053 (1990-08-01), Pratt
Force Translator; Revere Transducers, Inc. (Oct. 1991).

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