US 4,290,511 AGranted

Load-carrying strut construction

AssigneeFirma August Bilstein

InventorsJohannes J. de Baan, Adolf Adrian

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Abstract

A load-carrying, shock absorbing strut is provided comprising an outer tube for carrying a wheel axle journal. There is slidably accommodated in the tube a shock absorber cylinder which is connected with the chassis frame. A downwardly emerging piston rod of the cylinder is fastened to the bottom of the outer tube. Between the shock absorber cylinder and the outer tube there is provided a lubricant annular chamber of constant volume which is closed off above and below by upper and lower guide and sealing rings arranged on the outer tube. A sealing ring is arranged above each guide ring with axially limited play and comprise lubricant-sealing felt rings. To effect good dirt-deflecting action there is present above the upper sealing ring a dirt-deflecting ring which has the dual function of limiting the sealing ring axial play as well as removing dirt from the shock absorber cylinder.

Claims6

Dependent claims

A shock absorbing strut for a vehicle comprising an outer tube for carrying a vehicle wheel axle journal;

a shock absorber cylinder slidably axially movable in said outer tube;
said cylinder being connected at an end projecting from the outer tube with the vehicle chassis frame and having an exteriorly extending piston rod fastened to the outer tube bottom;
a lubricant annular chamber of constant volume closed off by upper and lower fixedly positioned guide rings and sealing rings disposed adjacent said guide rings;
said guide and sealing rings being disposed between the shock absorber cylinder and the outer tube;
each of said sealing rings being arranged above its respective guide ring in the normal position of strut use with axially limited play and comprising a lubricant sealing felt ring;
and a dirt-deflecting ring composed of water-resistant plastic disposed above the upper lubricant-sealing ring for limiting the axial play of said upper lubricant-sealing ring.

3 more elements

Dependencies are inferred from the claim text.