Liquid material dispenser

Details Liquid material dispenser Liquid material dispenser

1992-07-13

1993-09-21

Mitchell, David M.

Dispensing

With discharge assistant

Fluid pressure

222396, B67D 554

Patent

active

052461475

ABSTRACT:
A liquid material dispenser includes a housing formed with a reservoir for the liquid to be dispensed, an outlet through which the liquid is to be dispensed, and a connecting passageway between the reservoir and the outlet. A diaphgram is located in a cavity in the passageway such that one side of the diaphragm defines a pumping chamber, and the other side defines a control chamber. An electrolytic cell generates a gas to the control chamber according to the quantity of electrical current passed through the electrolyte, for driving the diaphragm through forward strokes to pump liquid to the outlet; and a slow-acting vent vents the gas from the control chamber to the atmosphere at a rate lower than that of generation of gas by the electrolytic cell, for driving the diaphragm through return strokes to refill the pumping chamber.

REFERENCES:
patent: 3199746 (1965-08-01), Dives et al.
patent: 3455485 (1969-07-01), Crownover
patent: 3716171 (1973-02-01), Blomgren et al.
patent: 4928850 (1990-05-01), Fallon et al.
patent: 5040704 (1991-08-01), Moran

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