RODLESS DISPENSER FOR EXTRUDABLE MATERIALS AND HAVING A CONTENTS INDICATOR
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United States of America Patent
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app pub date -
Feb 10, 2010
filing date -
Jan 8, 2010
priority date (Note) -
Abandoned
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Abstract
A push chain is used to drive a piston into a canister of extrudable material. The push chain is stored in an elongated chain magazine, withdrawn from the magazine and into the canister by actuation of a trigger connected to a sprocket for the chain. The push chain exerts a compressive force on a piston rod connected to a piston at a point offset from the center line of the piston, causing the piston to rotate to lock the push chain. The amount of material remaining in a tube of extrudable material is enunciated by way of a contents indicator driven by the push chain.
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