Power steering device for vehicles

Motor vehicles – Including one or more ski-like or runner members – With at least one surface-engaging propulsion element

Patent

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Details

74498, 91467, 92136, B62D 312, B62D 510, F15B 910

Patent

active

042993024

ABSTRACT:
An improved power steering device which has a pinion shaft connected with a steering wheel, a rack rod which is connected with steerable wheels and whose rack is in mesh with the pinion of the pinion shaft in the gear box, a power cylinder for hydraulically actuating the rack rod, and a changeover valve for selectively connecting the first and second hydraulic chambers of the power cylinder with the hydraulic pressure source and the oil reservoir. The pinion shaft is rotatably supported in the oscillating cage which is rotatably mounted on the gear box in a manner such that the axis of the oscillating cage is offset a certain distance from the axis of the pinion shaft, whereby the oscillating cage rotates about its axis when the steering torque is applied to the pinion shaft. The oscillating cage is connected with the changeover valve so that the latter is actuated by the rotary movement of the oscillating cage. With this construction, the changeover valve can be made to respond accurately to the steering torque and at the same time it is possible to reduce the size and simplify the structure of the device.

REFERENCES:
patent: 3352170 (1967-11-01), Adams
patent: 3897845 (1975-08-01), Von Lowis of Menar
patent: 4127186 (1978-11-01), Koyano et al.
patent: 4141432 (1979-02-01), Presley

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