Dispensing pump

Details Dispensing pump Dispensing pump

1977-09-09

1980-10-21

Rolla, Joseph J.

Dispensing

Resilient wall

With flow controllers or closures

222108, 222214, 417477, F04B 4312

Patent

active

042289300

ABSTRACT:
A dispensing pump is disclosed for dispensing a fluent material through a compressible conduit having a portion disposed within a pump housing in which is rotatably mounted a rotor operative to effect a peristaltic pumping action on the conduit. An actuating handle is interconnected to the rotor through a unidirectional drive to effect a predetermined quantity discharge upon each movement of the actuating handle in a dispensing direction, and several alternative mechanical arrangements are provided to effect drawback through the conduit to prevent dripping after each discharge while also preventing undesirable back siphoning of the fluent material. In one embodiment, the actuating handle is connected to the rotor through a constant force extension spring operative to effect rotational multiplication of the rotor upon movement of the actuating handle.

REFERENCES:
patent: 2334148 (1943-11-01), Jones
patent: 2668637 (1954-02-01), Gilmore
patent: 2721008 (1955-10-01), Morgan
patent: 3011684 (1961-12-01), Corneil
patent: 3781142 (1973-12-01), Zweig
patent: 3881641 (1975-05-01), Pliml et al.

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