Low mass piston for aerosol container

Details Low mass piston for aerosol container Low mass piston for aerosol container

1986-07-24

1987-11-03

Rolla, Joseph J.

Dispensing

With discharge assistant

Container with follower

222389, 92210, 92239, 92248, F16J 104

Patent

active

047038756

ABSTRACT:
An injection-molded piston for an aerosol container has a face portion for contacting and exerting pressure on material to be dispensed, and a thin, flexible skirt depending axially from and circumscribing the face portion for forming an effective seal against the inside wall of the container. The outer wall of the skirt is continuous, while the circumference of the inner wall has alternating areas of constant thickness along said areas and areas of minimum thickness, the curved portions forming with the outer wall a plurality of sections, the thickness and circumferential extent of each of which decrease axially along the skirt toward its distal end. The piston includes a depending extension on the skirt which aids sealing.

REFERENCES:
patent: 3066836 (1962-12-01), Trumbull
patent: 3099370 (1963-07-01), Hein
patent: 3132570 (1964-05-01), Hoffman, Jr. et al.
patent: 3245591 (1966-04-01), Kneusel et al.
patent: 3381863 (1966-05-01), Towns
patent: 3407974 (1968-10-01), Chmielowiec
patent: 3433134 (1969-03-01), Vellekoop
patent: 3901416 (1975-08-01), Schultz
patent: 4023717 (1977-05-01), Schultz
patent: 4106674 (1978-08-01), Schultz
patent: 4323177 (1982-04-01), Nielsen

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