Dispensing – Resilient wall – Supply container delivering to receiving chamber
Patent
1975-09-16
1976-12-07
Knowles, Allen N.
Dispensing
Resilient wall
Supply container delivering to receiving chamber
B65D 3700
Patent
active
039957764
ABSTRACT:
A manually operable liquid dispensing pump for use and incorporation on a container for liquid to be dispensed includes a component retaining body and a tubular member carried by the body having a flexible wall defining a variable volume pump chamber adapted to assume a fully distended position of maximum volume and a collapsed position of lesser volume. The retaining body has an aperture therethrough and a portion of the tubular member extends through the aperture to permit manual engagement therewith. Depressing the projection flexes the wall of the tubular member and reduces the volume of the pump chamber thereby pressurizing liquid to be dispensed in the pump chamber and, at the same time, with an inlet valve closed, causes an outlet to open whereupon the liquid in the pump chamber is adapted to flow into an outlet port and be dispensed therefrom. Release of the projection permits the tubular member to return to its starting position and permits the volume of the pump chamber to increase thereby lowering the pressure in the pump chamber and, at the same time, with the outlet valve closed, causes the inlet to open whereupon the liquid to be dispensed is drawn through an inlet port into the pump chamber until the flexible wall of the tubular member reaches its distended position whereupon the inlet valve closes to trap the liquid to be dispensed in the pump chamber.
REFERENCES:
patent: 1392601 (1921-10-01), Rose
patent: 1542584 (1925-06-01), Rose
patent: 3029742 (1962-04-01), Curtis
patent: 3486663 (1969-12-01), Humphrey
patent: 3752366 (1973-08-01), Lawrence, Jr.
patent: 3820689 (1974-06-01), Cocita
Knowles Allen N.
Leeds and Micallef
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