Liquid dispenser

Details Liquid dispenser Liquid dispenser

1975-05-28

1976-10-19

Reeves, Robert B.

Dispensing

With discharge assistant

Container with follower

128218P, A61M 5315

Patent

active

039866459

ABSTRACT:
A liquid dispenser in the form of a syringe having a barrel, with a piston valve/seal slidable in the barrel bore and having a preformed liquid passage hole extending through a slidable elastic main body thereof in which an elastic hour-glass shaped plug seal is removably disposed. A rearwardly extending post fixed on the forward end wall of the barrel bore effects rearward knockout removal of the plug seal from the preformed hole as a function of forward sliding movement of the piston valve/seal in the bore, and a liquid flow passage is formed in the post to enable passage of liquid therepast. The piston valve/seal main body has a plug-containment chamber which is larger than the plug and enables by-pass liquid flow past the plug after dislodgment of the plug into this chamber.

REFERENCES:
patent: 2735430 (1956-02-01), Huber
patent: 3151787 (1964-10-01), Miller

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