Dispensing mechanism and method for delivering measured doses wi

Details Dispensing mechanism and method for delivering measured doses wi Dispensing mechanism and method for delivering measured doses wi

1998-06-08

1999-11-23

Recla, Henry J.

Dispensing

With discharge assistant

With discharge volume varying means

222 43, 604208, B65D 8854

Patent

active

059884525

ABSTRACT:
A dispensing mechanism for an applicator having a cylinder and a plunger. The plunger has a piston head slidable in liquid-tight manner within the cylinder. The plunger performs an expansion stroke to draw fluid into the cylinder and performs a compression stroke to dispense fluid from the cylinder. The dispensing mechanism includes a stop member attached to the cylinder of the applicator. The stop member has an engagement part extending toward the plunger. The plunger has at least one abutment formed on its surface for contacting the engagement part and limiting the motion of the plunger. Each abutment preferably comprises an end surface of a longitudinal groove formed in the surface. The engagement part tracks within the longitudinal groove and preferably limits the expansion stroke when the engagement part contacts the end surface. Each longitudinal groove is of a different length corresponding to a desired dose volume in the cylinder. The engagement part can track to a desired longitudinal groove through the circumferencial groove.

REFERENCES:
patent: 2605763 (1952-08-01), Smoot
patent: 2736315 (1956-02-01), Feneey
patent: 3831602 (1974-08-01), Broadwin
patent: 4564360 (1986-01-01), Young et al.
patent: 4678107 (1987-07-01), Ennis, III
patent: 4852772 (1989-08-01), Ennis, III
patent: 4923096 (1990-05-01), Ennis, III
patent: 4981472 (1991-01-01), Ennis, III et al.
patent: 5344409 (1994-09-01), Ennis, III et al.

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