Fluid dispensing pump

Details Fluid dispensing pump Fluid dispensing pump

1987-10-02

1988-11-15

Freeh, William L.

Pumps

Motor driven

Fluid motor

417490, 222378, F04B 908, F04B 1502

Patent

active

047845821

ABSTRACT:
A pneumatically operated pump for dispensing controlled shots of paste material includes a disposal paste syringe tube having a ferrule with an axial dispensing hole centered in the bottom. An axial movable plunger extending through the length of the syringe normally fits into and blocks the dispensing hole, but when the punger is lifted a predetermined amount, the paste under a small pressure flows into the space and, when a driver returns the plunger to its normal position, the paste column is shot through the dispensing hole. The driver for moving the plunger includes a spring loaded diaphram center connected to the drive end of the plunger. Applied air pressure against the diaphragm lifts the plunger and compresses the spring. On release of the pressure, the spring rapidly drives the plunger back to its normal position to dispense a small column of paste.

REFERENCES:
patent: 2232522 (1941-02-01), Gray
patent: 3595340 (1971-07-01), Obergefell
patent: 4577783 (1986-03-01), Racca et al.
patent: 4664299 (1987-05-01), Goncalves

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