Plunger piston system with separate plastic plunger piston and s

Details Plunger piston system with separate plastic plunger piston and s Plunger piston system with separate plastic plunger piston and s

1988-09-09

1990-01-02

Oberleitner, Robert J.

Spring devices

Vehicle

Comprising compressible fluid

403377, F16F 904, B25G 300

Patent

active

048908231

ABSTRACT:
The invention relates to a plunger piston system made preferably of glass fiber-reinforced plastic or similar composite material to support and guide the pneumatic spring bellows of an air suspension axle of a commercial vehicle or the like, with a plunger piston, which has an essentially cylindrical plunger piston skirt with a bottom foot region for the connection with an air spring bearing arm and an upper, preferably essentially semi-circular plunger piston edge, which adjoins the plunger piston skirt and which transforms preferably at an angle from the outside inwardly into a trough section that is equipped with a preferably, in any event region by region, essentially level trough base, having an opening for the passage of a bolt for a friction lock connection with a base of the air spring bellows, and that preferably forms a truncated conical trough for preferably form-locked reception of the convex base of the air spring bellow, whereby to simplify the production and yet improve the stability a supporting member designed as a separate component is mounted in the cavity surrounded by the essentially cylindrical plunger piston shell, the supporting member abutting with an upper base plate the under side of the trough base of the plunger piston, and the plunger piston and supporting member abut in their bottom foot region at least at several points distributed over the perimeter of the foot regions.

REFERENCES:
patent: 4506910 (1985-03-01), Bierens
patent: 4784376 (1988-11-01), Ecktman
patent: 4787606 (1988-11-01), Geno et al.

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