Pump dispenser for dispensing accurate small quantities of a flu

Details Pump dispenser for dispensing accurate small quantities of a flu Pump dispenser for dispensing accurate small quantities of a flu

1989-04-14

1990-08-28

Skaggs, H. Grant

Dispensing

With cutter and/or punch

To form dispensing opening in container

222321, 222383, B67B 746

Patent

active

049518402

ABSTRACT:
In a pump dispenser for dispensing accurate small quantities of a fluid substance, e.g. an ophthalmological substance, comprising a pump body (1), a piston (5) movable between two positions, a suction orifice, and a discharge orifice, the opening through the suction orifice is directly and positively controlled by displacement of the piston using a slide valve type of mechanism, with the discharge orifice being provided with a non-return valve and with the compression chamber of the pump being annular in shape between the piston and the pump body.

REFERENCES:
patent: 515661 (1894-02-01), Day
patent: 1989714 (1935-02-01), Statham
patent: 3194447 (1965-07-01), Brown
patent: 3211346 (1965-10-01), Mestberg
patent: 3323661 (1967-06-01), Chasai
patent: 3877617 (1975-04-01), Stevens
patent: 4227650 (1980-10-01), McKinney
patent: 4311425 (1982-01-01), Palda
patent: 4728006 (1988-03-01), Drobist et al.

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