Apparatus for dispensing a predetermined volume of paste-like fl

Details Apparatus for dispensing a predetermined volume of paste-like fl Apparatus for dispensing a predetermined volume of paste-like fl

1987-07-23

1989-07-18

Huppert, Michael S.

Dispensing

With discharge assistant

Motor operated

118410, 141284, 222390, B05C 302

Patent

active

048486060

ABSTRACT:
A piston driving device for dispensing a predetermined small amount of paste-like material from a nozzle in response to an electrical signal without any time-delay is enabled by the slow rotation of a ball-screw shaft, the rotation being reduced by a differential gear system. A female ball-nut fitted onto the ball-screw shaft causes a piston plunger to advance at very low speed such that dispensing of the predetermined volume of paste-like fluid is possible. Vertical motion of a nozzle is compensated by vertical motion of a piston driving device such that the relative position of a piston against a nozzle is unchanged.

REFERENCES:
patent: 1083887 (1914-01-01), Matthews
patent: 2715991 (1955-08-01), Frank et al.
patent: 2946486 (1960-07-01), Gilmont
patent: 4096972 (1978-06-01), Bartels et al.
patent: 4235556 (1980-11-01), Dewey et al.
patent: 4485387 (1984-11-01), Drumheller
patent: 4573566 (1986-03-01), Roman
patent: 4622239 (1986-11-01), Schoenthaler et al.

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