Speed limiting system for lifting devices

Details Speed limiting system for lifting devices Speed limiting system for lifting devices

2007-07-03

2007-07-03

Marcelo, Emmanuel M (Department: 3654)

Implements or apparatus for applying pushing or pulling force

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

Device includes rotatably driven, cable contacting drum

C254S275000, C188S18100R

Reexamination Certificate

active

11221784

ABSTRACT:
Speed limiter system to detect over speed and generate a signal to cut the power and if necessary operate brakes. It consist of the limiter itself, with a tension pulley. The limiter consists of weights connected by a mechanism that moves asymmetrically and by centrifugal force when an over speed occurs to operate the lever of an electrical contact, with the possibility of remote resetting using the necessary means. On the other hand, the tension pulley provides sufficient tension to both sections of the cable via an adjustable compression spring or by means of weights suspended on an articulated arm, both transmitting sufficient tension to the tension pulley axle.

REFERENCES:
patent: 4402470 (1983-09-01), Hamayasu
patent: 4493479 (1985-01-01), Clark
patent: 4555091 (1985-11-01), May et al.
patent: 5261645 (1993-11-01), Huffman
patent: 5366203 (1994-11-01), Huffman

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