Electric powered lift with load control

Details Electric powered lift with load control Electric powered lift with load control

2007-12-25

2007-12-25

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

C254S271000, C254S273000, C254S325000, C254S326000, C280S047290, C414S490000

Reexamination Certificate

active

11702393

ABSTRACT:
A lifting device utilizing a utility winch having an electric motor and cable drum. The cable on the cable drum extends around a pulley located on a load cell beam. Excessive loads will deflect the load cell beam causing a contact on a micro switch to be engaged to shut off power to the motor. The cable is attached to a trolley which reciprocates along a mast between upper and lower limits. The trolley includes a brake which has a drum which engages the mast to stop in travel of the trolley in the event of a cable breakage. Cable tension is also sensed and cable slack will actuate a switch to interrupt power to the electric motor. Various load handling attachments are detachably securable to the trolley.

REFERENCES:
patent: 3583572 (1971-06-01), Tax
patent: 4359207 (1982-11-01), Maryonovich et al.
patent: 4471945 (1984-09-01), McGraw
patent: 5489032 (1996-02-01), Mayhall et al.
patent: 5492306 (1996-02-01), Zaguroli, Jr.
patent: 5662311 (1997-09-01), Waedekin et al.

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