Arrangement in industrial trucks

Motor vehicles – Steam traction engines – Driven steering wheel type

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Details

180 655, 180209, 280 4312, 280 4318, 280 92, 280 963, 280696, 280840, 280 612, B62D 6300

Patent

active

048057100

ABSTRACT:
An arrangement in industrial trucks of the kind which include a chassis (3) carried by support wheels (5, 6) which lack spring suspension, and driven by a sprung drive-wheel (7) arranged between two support wheels. A hydraulically operable load carrying device (2) is provided for lifting primarily goods-laden pallets. The sprung movement of the drive-wheel (7) relative to the chassis is effected with the aid of a spring assembly (22) which includes link arms (25, 26) and a spring (24) both being arranged between the chassis and the drive-wheel. The spring (24) includes a hydraulic working piston-cylinder device (27) by means of which the spring assembly can be given a desired spring bias or spring force. The piston-cylinder device is connected to the hydraulic system of the load carrying device in a manner to increase automatically the spring bias, and therewith the pressure exerted by the drive-wheel against the floor or like surface when the load carried increases.

REFERENCES:
patent: 1794630 (1931-03-01), Linn
patent: 2173737 (1939-09-01), Ulinski
patent: 3276757 (1966-10-01), Klemick et al.
patent: 3276787 (1966-10-01), Klemick et al.
patent: 3380546 (1968-04-01), Rabjohn
patent: 3486333 (1969-12-01), Thomas
patent: 3598422 (1971-08-01), Strauff
patent: 3628810 (1971-12-01), Graef
patent: 4424872 (1984-01-01), Granlind et al.
patent: 4750579 (1988-06-01), Jarl et al.

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