B - Operations – Transporting – 66 – D
Patent
B - Operations, Transporting
66
D
212/29, 254/96
B66D 1/20 (2006.01) B66D 1/44 (2006.01) B66D 5/26 (2006.01)
Patent
CA 1185592
ABSTRACT OF THE DISCLOSURE One or more freefall systems for a crane or the like is disclosed, which system includes a protective circuit that includes three separate switches that must be closed before the winch can be placed in its freefall mode. A mode switch in the cab must first be closed, a brake pedal must be depressed to close a second switch, and a third switch must be held closed by the operator during freefall.
402612
Crawford Steven C.
Feltman Thomas J.
Steuck Roger A.
Fetherstonhaugh & Co.
Fmc Corporation
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