Elevator – industrial lift truck – or stationary lift for vehicle – Stationary lift for roadway vehicle or required component... – Having specific drive means for support
Patent
1974-12-23
1976-07-13
Love, John J.
Elevator, industrial lift truck, or stationary lift for vehicle
Stationary lift for roadway vehicle or required component...
Having specific drive means for support
13735517, 214DIG11, B66B 920, B65H 7534
Patent
active
039688593
ABSTRACT:
A triple section mast for a lift truck is disclosed in which a single pulley carries two hydraulic supply hoses in one on top of the other relationship thereby minimizing lateral space occupied by the hoses and maximizing the visibility through the mast. The three-stage mast utilizes one single acting hydraulic lift jack extending between the intermediate and inner mast sections and a pair of short single acting hydraulic jacks mounted on the inner mast section with pistons supporting pulleys about which carriage support chains are trained and connected to the carriage on the inner mast section. A hose pulley is supported on each short jack piston in oblique relation to the chain pulley so that the two hoses trained over each hose pulley pass downwardly to the carriage on the laterally inner sides of the chains and pass downwardly at the rear of the short jacks on the laterally outer sides of the carriage support chains where they are connected to two manifolds mounted on the inner mast section. Two pairs of hoses are connected to the manifolds on the inner mast section and are trained one on top of the other around pulleys on the bottom of the intermediate mast section and thence upwardly to a pair of manifolds near the top of the outer mast section. The hose pulleys at the bottom of the intermediate mast section are mounted on a pair of stub axles which also support a pair of load pulleys carrying chains extending between the inner mast section and the outer mast section.
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Allis-Chalmers Corporation
Love John J.
Rowland James L.
Schwab Charles L.
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