Manually operated trigger type dispenser

Details Manually operated trigger type dispenser Manually operated trigger type dispenser

1985-12-05

1987-09-08

Rolla, Joseph J.

Dispensing

With discharge assistant

With material supply container and discharge assistant with...

222383, 239333, B67D 540, B05B 9043

Patent

active

046918493

ABSTRACT:
A dispenser body molded of plastic material includes an upper body portion on which a trigger is swingably pivoted and a vertically extending lower tubular portion. A piston has an L shape and includes an upper folded horizontal portion carried by spaced vertical wall portions of the upper body portion. The piston is vertically disposed in the upper body portion. A nozzle member is mounted on the terminal end of the upper folded horizontal portion. An outlet conduit, communicating with an orifice formed in the nozzle member, is formed in the piston. A cylinder coupled to the trigger is disposed to slide vertically along the piston within the lower tubular portion. The cylinder defines a pump chamber communicating with the outlet conduit. An inlet conduit communicating with the pump chamber is formed in the cylinder. A compression spring, seated in the cylinder at the lower end thereof and abutting on the lower end of the piston at upper end thereof, biases the cylinder to its lower non-operation position.

REFERENCES:
patent: 2645386 (1953-07-01), Bobrick
patent: 2693899 (1954-11-01), Trout
patent: 3062416 (1962-11-01), Cooprider
patent: 3768734 (1973-10-01), Anderson, Jr. et al.
patent: 3840157 (1974-10-01), Hellenkamp
patent: 4161288 (1979-07-01), McKinney
patent: 4227650 (1980-10-01), McKinney
patent: 4358057 (1982-11-01), Burke
patent: 4371097 (1983-02-01), O'Neill

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