Automatic larvicide dispenser

Details Automatic larvicide dispenser Automatic larvicide dispenser

1984-02-21

1985-08-20

Rolla, Joseph J.

Dispensing

Automatic control

137 781, 417 14, B67D 508

Patent

active

045359148

ABSTRACT:
An automatic larvicide dispensing apparatus which is actuated by weather conditions. A container for holding liquid larvicide has a sealed cylinder disposed therein and a piston reciprocally disposed within such cylinder. This piston is biased to one position within the cylinder and is movable to a second position. A leather strap, or other actuator having similar properties, allows the piston to move to the first position thereof when weather is wet and shrinks to push the piston to the second position when weather conditions are dry. The cylinder has one-way valves associated therewith to act as a pump for loading the cylinder during wet conditions and dispensing the larvicide from the cylinder during dry conditions.

REFERENCES:
patent: 3214061 (1965-10-01), Mills
patent: 3654953 (1972-04-01), Hagdorn
patent: 3937440 (1976-02-01), MacGregor et al.
patent: 4023772 (1977-05-01), Ratelband
patent: 4050669 (1977-09-01), Brumm
patent: 4182357 (1980-01-01), Ornstein

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