Self cleaning shampoo dispenser

Details Self cleaning shampoo dispenser Self cleaning shampoo dispenser

1977-04-25

1979-08-28

Spar, Robert J.

Dispensing

With discharge assistant

With biasing means for discharge assistant and/or its casing

222385, 417498, G01F 1104

Patent

active

041658248

ABSTRACT:
This invention is a manually operated liquid dispenser designed in particular to dispense heavy soaps like hair washing shampoo. The dispensers which are presently available on the market are unsuitable for these reasons, (a) too expensive to manufacture, (b) have too many parts, (c) plug up the dispensing hole in a very short time. This dispenser has a very positive dispensing action and it positively vacuums out the dispensing hole during the return stroke. All parts can be molded from plastic or other moldable material and used without machining. The number of parts used to make this dispenser is far less than what is presently used in such dispensers. This dispenser is particularly suitable for domestic use. It has no flexible membrane or any spring loaded valves.

REFERENCES:
patent: 828445 (1906-08-01), Wares et al.
patent: 920931 (1909-05-01), Donnelly
patent: 968498 (1910-08-01), Squadrilli
patent: 1174674 (1916-03-01), Byer
patent: 2594223 (1952-04-01), Santarelli
patent: 3203597 (1965-08-01), Birch
patent: 3940070 (1976-02-01), Boris

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