Low mass piston system for necked-in aerosol cans

Details Low mass piston system for necked-in aerosol cans Low mass piston system for necked-in aerosol cans

1991-07-17

1992-07-07

Shaver, Kevin P.

Dispensing

With discharge assistant

Container with follower

222386, B67D 554

Patent

active

051275562

ABSTRACT:
An aerosol can piston and system, employing an aerosol can with a sidewall which is necked in at the bottom and a low mass piston with recessed, depending legs. The piston has a lower skirt portion, the outermost diameter of which is slightly smaller than the diameter of the inner wall of the can above the necked-in portion. The legs depending from the piston have an effective outer diameter somewhat less than the inside diameter of the lower necked-in portion of the can sidewall and depend sufficiently downward to sit on the can bottom countersink while maintaining the skirt of the piston at a level just above the level at which the can sidewall necks inwardly. The legs thus stabilize the piston and prevent tipping and canting. In an alternative embodiment the piston also includes a plurality of vertical columns protruding from its sidewall to further stabilize the piston.

REFERENCES:
patent: 3099370 (1963-07-01), Hein
patent: 3132570 (1964-05-01), Hoffman, Jr. et al.
patent: 3245591 (1966-04-01), Kneusel et al.
patent: 3827607 (1974-08-01), Schultz
patent: 3901410 (1975-08-01), Schultz
patent: 3901416 (1975-08-01), Schultz
patent: 3920165 (1975-11-01), Schultz
patent: 4023717 (1977-05-01), Schultz
patent: 4106674 (1978-08-01), Schultz
patent: 4234108 (1980-11-01), Diamond
patent: 4703875 (1987-11-01), Malek
patent: 4913323 (1990-04-01), Scheindel

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