Brake mechanism for a storage and retrieval vehicle

Details Brake mechanism for a storage and retrieval vehicle Brake mechanism for a storage and retrieval vehicle

1993-09-03

1994-11-22

Noland, Kenneth W.

Elevator, industrial lift truck, or stationary lift for vehicle

Having specific means contacting or on load support for...

Includes movable contact component on support for engaging...

188 67, B66B 516

Patent

active

053660455

ABSTRACT:
An overspeed brake mechanism for a storage and retrieval vehicle (SRV). The brake mechanism includes wedges acting between a brake block attached to the load carriage of the SRV and a rail fixed to the mast of the SRV. The wedges are biased into braking engagement with the mast and are held out of braking engagement under normal operating conditions by a solenoid acting through a linkage system, the solenoid being de-energized by a control system responsive to an overspeed signal from a tachometer generator on the load carriage and having its input member in engagement with the mast. In accordance with one aspect of the invention, permanent magnets embedded in the wedges bias the wedges away from contact with the rail to prevent inadvertent engagement of the brake system while maintaining the wedges in position for rapid engagement.

REFERENCES:
patent: 2150373 (1939-03-01), Hymans
patent: 3119464 (1964-01-01), Rountree
patent: 3232382 (1966-02-01), Buck
patent: 3249179 (1966-05-01), Borgman
patent: 3601227 (1971-08-01), Burch
patent: 4240529 (1980-12-01), Hagmann et al.
patent: 5141081 (1992-08-01), Kregel et al.
patent: 5159995 (1992-11-01), Sissala et al.
patent: 5209325 (1993-05-01), Gines et al.
patent: 5228540 (1993-07-01), Glaser

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