Elevator – industrial lift truck – or stationary lift for vehicle – Stationary lift for roadway vehicle or required component... – Having specific drive means for support
Patent
1982-04-28
1985-07-16
Barefoot, Galen L.
Elevator, industrial lift truck, or stationary lift for vehicle
Stationary lift for roadway vehicle or required component...
Having specific drive means for support
212124, 414266, 414279, B65B 516, B66C 1900, B65G 6500
Patent
active
045290660
ABSTRACT:
In a mast crane wherein a tension member controls the position of a carriage along an upright guide rail, the tension member is connected with a load transmitting element against which an abutment on the carriage bears down under carriage weight. A brake shoe carrier that has a link connection with the carriage carries two brake shoes, and by swinging about said link connection it clampwise engages them against opposite carriage-guiding surfaces on the rail. A linkage connecting the load transmitting element with the brake shoe carrier causes brake-engaging swinging of the carrier when the load transmitting element drops away from the abutment upon failure of the tension member. A spring biases the brake shoe carrier for such swinging, but its force is normally overcome by weight of the carriage. The link connection of the brake shoe carrier with the carriage is arranged for brake self-energizing once the brake shoes engage the rail.
REFERENCES:
patent: 1206350 (1916-11-01), Meech
patent: 2561060 (1951-07-01), Lancaster
patent: 3517775 (1970-06-01), Meyer
patent: 3543884 (1970-12-01), Riedner
patent: 3606039 (1971-09-01), Weston et al.
patent: 3887038 (1975-06-01), Buschbom et al.
Barefoot Galen L.
Harnischfeger Corporation
Johnson R. B.
Nilles James E.
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