Electrically powered squeezer for dispensing a viscous substance

Details Electrically powered squeezer for dispensing a viscous substance Electrically powered squeezer for dispensing a viscous substance

1984-05-31

1986-10-07

Rolla, Joseph J.

Dispensing

With discharge assistant

Insertable cartridge or removable container

222333, 222390, 74785, B05B 1102, F16H 344

Patent

active

046154698

ABSTRACT:
An electrically powered squeezer such as a caulking gun for dispensing a viscous substance such as a caulking or sealing compound. The gun comprises a housing carried by an operator and incorporating an electric motor and a switch for energizing and deenergizing the motor. The housing is formed with a holder for receiving therein a cartridge filled with the above viscous substance and having a discharge nozzle. Incorporated within the housing is a pressing element driven by the motor to compress the cartridge wall so as to force the viscous substance out of the cartridge through the nozzle. A release mechanism is included to disengage the driving connection between the motor and the pressing element when the switch deenergizes the motor, in such a way as to allow the pressing element to retract to a position where the pressing element no longer exerts pressure upon the viscous substance. Accordingly, when the squeezing of the viscous substance is interrupted, the consequential retraction of the pressing element releases the residual pressure in the viscous substance remaining within the cartridge which developed in the previous squeezing by the pressing element, thus preventing the viscous substance from drooping or oozing from the nozzle.

REFERENCES:
patent: Re26180 (1967-04-01), Frenzel et al.
patent: 3415419 (1968-12-01), Jewett et al.
patent: 3550815 (1970-12-01), Salonen
patent: 3566471 (1971-03-01), Bull
patent: 3799407 (1974-03-01), Loethen et al.
patent: 3854629 (1974-12-01), Blieberger

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