Material dispensing tool and plunger for cylindrical cartridges

Details Material dispensing tool and plunger for cylindrical cartridges Material dispensing tool and plunger for cylindrical cartridges

1993-02-05

1994-05-24

Kashnikow, Andres

Dispensing

Plural sources, compartment, containers and/or spaced jacket

With discharge assistant for each source

222327, 222391, B67D 552

Patent

active

053140923

ABSTRACT:
The disclosed tool dispenses material from a tubular cartridge having a front closure wall and nozzle, and having a wiper closing an open cartridge end and slidable forwardly within the cartridge. A plunger sized to fit within the cartridge is carried on a rod for moving the plunger axially within the cartridge against the wiper. The plunger has a conically ramped surface expanding from its smallest adjacent a front shoulder to its largest adjacent a rear shoulder, and rear and front peripherical guide surfaces extended endwardly from the radial shoulders to cooperate with the cartridge. An O-ring surrounding the ramped surface is movable between the radial shoulders, the O-ring and ramped surface being sized with the O-ring against the rear shoulder to seat between the cartridge and plunger for sealing against rearward material leakage therepast and being sized with the O-ring against the front shoulder to be gapped from between the cartridge and plunger for cartridge venting to withdraw the plunger from the open cartridge end.

REFERENCES:
patent: 2826339 (1958-03-01), Maillard
patent: 3117696 (1964-01-01), Herman et al.
patent: 4067479 (1978-01-01), Moline
patent: 4840294 (1989-06-01), Ernst
patent: 4934827 (1990-06-01), Taschke et al.
patent: 5104005 (1992-04-01), Schneider, Jr. et al.
patent: 5263614 (1993-11-01), Jacobsen et al.

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