Material or article handling – Elevator or hoist and loading or unloading means therefor – Comprising means enabling additional movement of carrier or...
Patent
1986-10-30
1987-10-06
Spar, Robert J.
Material or article handling
Elevator or hoist and loading or unloading means therefor
Comprising means enabling additional movement of carrier or...
187 85, 414282, B66B 520
Patent
active
046979778
ABSTRACT:
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.
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Coons Randall P.
Loomer Weston R.
Litton Systems Inc.
Millman Stuart J.
Pollack Morris I.
Spar Robert J.
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