Wrap spring brake

Brakes – Wheel – Transversely movable

Reexamination Certificate

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Details

C188S082600

Reexamination Certificate

active

07080719

ABSTRACT:
A winch with a wrap spring brake is provided. The winch includes a rotatable drum configured to wind and unwind a cable. The cable may be connected to a load to be moved. A shaft is coupled to the drum such that rotation of the shaft causes rotation of the drum, thereby winding or unwinding the cable about the drum. The winch also includes an input hub capable of rotating and coupled to the shaft such that rotation of the input hub causes rotation of the shaft. The winch also includes a grounding hub. Finally, the winch includes a wrap spring wound about the grounding hub. The wrap spring has a first end and a second end. The first end of the wrap spring is coupled to the shaft such that the first end rotates with the shaft. The wrap spring is configured to be wrapped down on the grounding hub when the input hub is not rotated, thereby automatically locking the winch.

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A copy of PCT International Search Report for International Application No. PCT/US2005/031551 mailed on Dec. 28, 2005 (7 pages).

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