B - Operations – Transporting – 66 – B
Patent
B - Operations, Transporting
66
B
187/15, 186/29
B66B 5/16 (2006.01) B66F 9/07 (2006.01)
Patent
CA 1226824
ABSTRACT OF THE DISCLOSURE A stacker-retriever lift carriage is disposed to be raised, lowered and positioned, in selected positions with respect to a pair of spaced support masts, by a flexible wire cable one end of which is connected to a lift carriage drive and the other end of which is connected to the lift carriage through a pair of four bar linkages pivotally connected together in spaced parallel relationship to form a safety brake operating mechanism. The upward pull by the cable upon the brake operating mechanism retracts a pair of opposed brake arms, pivotally carried by the brake operating mechanism, to a brake deactivated position with the back ends of each brake arm abutting each other. Loss of the pull of the cable on the lift carriage, as would occur if the cable severed or if the lift carriage hung up, permits a spring housed between the brake arms to move the brake operating mechanism and the brake arms to a braking position with brake pads carried by the brake arms in friction engagement with the support masts.
456651
Coons Randall P.
Loomer Weston R.
Litton Systems Inc.
Macrae & Co.
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