Two-chamber cartridge

Details Two-chamber cartridge Two-chamber cartridge

2006-01-03

2008-10-07

Shaver, Kevin P. (Department: 3754)

Dispensing

Plural sources, compartment, containers and/or spaced jacket

With discharge assistant for each source

C222S135000, C222S162000

Reexamination Certificate

active

07431179

ABSTRACT:
In a two chamber cartridge with chambers arranged axially one after the other, wherein the front chamber in a front part of the cartridge interior is divided by a double wall insert into an outer partial chamber and an inner partial chamber which are both closed at the rear ends by pistons and the rear chamber is formed by a beaker which is inserted into the rear of the cartridge and has a beaker bottom with a pin extending from the beaker bottom through an annular piston closing the beaker, the rear end of the double wall insert abuts the annular piston closing the beaker and the annular piston includes passages leading to gap between the two spaced walls of the double wall insert and the two front partial chambers and the intermediate space are in communication with a mouthpiece space at the front end of the cartridge.

REFERENCES:
patent: 2826339 (1958-03-01), Maillard
patent: 4029236 (1977-06-01), Carson, Jr. et al.
patent: 4050612 (1977-09-01), Stone
patent: 4220261 (1980-09-01), White
patent: 4961520 (1990-10-01), White
patent: 5139171 (1992-08-01), Mader
patent: 7237693 (2007-07-01), Brennan et al.
patent: 0 624 403 (1994-11-01), None

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