Piston for dispensing device, dispensing device, product...

Details Piston for dispensing device, dispensing device, product... Piston for dispensing device, dispensing device, product...

2007-05-29

2007-05-29

Maust, Timothy L. (Department: 3751)

Fluent material handling, with receiver or receiver coacting mea

Processes

Filling dispensers

C141S020000, C141S027000, C053S470000

Reexamination Certificate

active

10238209

ABSTRACT:
A piston for a pressurized container (i.e., “aerosol can”), the piston including a body having circumferential fins, with the fins being of uniform thickness, decreasing thickness radially away from the body, or varying thickness circumferentially. Further disclosed are container precursors and containers incorporating such a piston, and methods of filling and dispensing from such containers.

REFERENCES:
patent: 4685597 (1987-08-01), Hirao et al.
patent: 4877156 (1989-10-01), Clanet et al.

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