Pistons for pressure-dispensing containers

Details Pistons for pressure-dispensing containers Pistons for pressure-dispensing containers

1987-11-09

1989-08-08

Huppert, Michael S.

Dispensing

With discharge assistant

Container with follower

222327, B67D 542

Patent

active

048544850

ABSTRACT:
A piston for a pressure-dispensing container such as a cartridge for an extrusion gun has its closure panel formed of a central portion (34) arranged to receive the applied extrusion forces, and an annular and frustoconical outer portion (40) arranged to transmit the extrusion forces to the piston skirt (30) with an outwardly directed component by which the skirt is radially expanded to make firm sealing engagement with the container bore. The central portion is rigid so as to withstand the extrusion forces without any substantial distortion; the outer portion acts as a substantially rigid annular strut, notches (44) localizing any bending movements to the junctions of the outer portion with the central portion and with the skirt.

REFERENCES:
patent: 2923442 (1960-02-01), Maras
patent: 3319841 (1967-05-01), Berg
patent: 3378175 (1968-04-01), Krieps
patent: 4179050 (1979-12-01), Farrell, III et al.
patent: 4331267 (1982-05-01), Duncan et al.

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