Motor vehicles – Steam traction engines – Driven steering wheel type
Patent
1988-02-08
1989-02-21
Mitchell, David M.
Motor vehicles
Steam traction engines
Driven steering wheel type
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.
Gustafsson Tore
Jarl Bernt
Aktiebolaget Bygg-och Transportekonomi (BT)
Culbreth Eric
Mitchell David M.
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