Material or article handling – Vertically swinging load support – Shovel or fork type
Patent
1986-09-24
1988-07-05
Paperner, Leslie J.
Material or article handling
Vertically swinging load support
Shovel or fork type
74103, 74520, 414690, 414691, B66C 2300
Patent
active
047551020
ABSTRACT:
In a fork-lift truck comprising a wheeled structure carrying a lifting arm with a first part articulated at its rear end to the structure and a second part projecting downwardly from the front end of the first part and carrying a forked loading platform, and a jack for raising and lowering the arm, the lifting arm is supported by the wheeled structure so as to be orientable about a substantially vertical axis and two adjacent caliper units located in a general V configuration are provided to move the forked platform linearly relative to the lifting arm. Each caliper unit includes two plates having one mutual hinged articulation end and opposite articulation ends respectively hinged to the second part of the lifting arm and to the forked platform, the hinged articulations of the caliper units having respective axes which diverge downwardly and are substantially perpendicular to each other. Actuators are interposed between the two plates of each caliper unit for opening and closing them simultaneously.
REFERENCES:
patent: 2569354 (1951-09-01), Tracy
patent: 4179010 (1979-12-01), Ashworth
patent: 4257725 (1981-03-01), Zieschang
patent: 4382743 (1983-05-01), Newell
patent: 4583907 (1986-04-01), Wimberley
Doyle Jennifer
Merlo S.p.A. Industria Metalmeccanica
Paperner Leslie J.
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