Hydraulic power steering device

Details Hydraulic power steering device Hydraulic power steering device

1991-07-16

1993-04-27

Mitchell, David M.

Motor vehicles

Surface effect vehicles

Dynamic seal or fluid curtain

91375A, 91401, 180162, B62D 506

Patent

active

052053725

ABSTRACT:
A device comprising a cylinder and a piston slidably fitted therein and having a metal piston ring attached to its outer periphery. The cylinder has a recess in each of a plurality of portions thereof dividing the inner periphery of the cylinder circumferentially thereof and opposed to the piston ring when the piston is brought close to each of its opposite stroke ends, the recess having a width smaller than the width of fit of the piston to the cylinder. The piston has a recess corresponding to the recess in the cylinder inner periphery and formed in each of a plurality of portions of the piston in the vicinity of the piston ring and diving the outer periphery of the piston circumferentially thereof. The cylinder has two oil chambers formed on the respective opposite sides of the piston and adapted to communicate with each other through the cylinder recess and the piston recess upon the piston being brought close to each stroke end.

REFERENCES:
patent: 3092083 (1963-06-01), Sheppard
patent: 3935790 (1976-02-01), Goff
patent: 4261248 (1981-04-01), Elser et al.
patent: 4648307 (1987-03-01), Rabe

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