Dispenser with an air pump mechanism

Details Dispenser with an air pump mechanism Dispenser with an air pump mechanism

1982-09-09

1985-01-08

Rolla, Joseph J.

Dispensing

With discharge assistant

Fluid pressure

222401, 417440, B65D 8314

Patent

active

044923201

ABSTRACT:
A cylinder extends into a container containing fluid to be dispensed and includes a pressure accumulating valve at the internal end. A piston sliding in the cylinder includes an air suction valve at the internal end and a pressure chamber is formed between the piston and the cylinder. An elastic piece is axially flexible and is attached to the bottom of the piston. The air suction valve has an axially flexible valve body. A stem fixed at one end to the bottom of the elastic piece is extended into the piston at the other end, and has a pushing part at the other end to release the air suction valve from the valve seat by contacting the valve body when the elastic piece is moved toward the air suction valve.

REFERENCES:
patent: 1745024 (1930-01-01), Malone
patent: 3955720 (1976-05-01), Malone
patent: 4165025 (1979-08-01), Mascia et al.

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