US 5,184,760 AGranted

Metered side dispensing cap for tubes

AssigneePrimary Delivery Systems, Inc.

InventorsJack Weinstein, Kenneth P. Glynn

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Abstract

The present invention is directed to a metered side dispensing cap system for containers such as tubes and the like. It includes a chamber unit having an inlet opening in the bottom for flow of a material from a squeezable container into the chamber. The chamber unit has an outlet opening on a sidewall located near the bottom for dispensing material from the chamber in a metered amount. A one-way valve located in the inlet opening on the bottom of the chamber unit permits flow of material through that opening and prevents backflow of material. A piston mechanism moves upwardly and downwardly within the chamber. The piston mechanism is capable of upward movement by material entering the chamber unit when a squeezable container is squeezed and material enters the chamber unit through its inlet opening. The piston is capable of downward movement when its wide top is pushed downward, so as to dispense material through the sidewall outlet opening of the chamber unit. The system is attachable to an open neck of a squeezable container.

Claims20

Dependent claims

A metered side dispensing cap system for attaching to squeezable containers, which comprises:

(a) a chamber unit having an inside and an outside, a bottom, sidewalls and a top and having an inlet opening in said bottom for flow of a material from a squeezable container into said chamber, having an outlet opening on a sidewall located near said bottom for dispensing material from the chamber in a metered amount, having an opening at said top for receiving a piston rod and having means for attachment of said chamber unit to an open neck of a squeezable container;
(b) a one-way valve located in said inlet opening on the bottom of said chamber unit, permitting flow of material from a squeezable container through said opening and preventing backflow of material back into said container;
(c) a gate located on the outside of said chamber unit near said outlet opening movably attached thereto so as to be movable vertically to an upward position and to a downward position whereby, in said upward position, said outlet opening remains open and, in said downward position, said gate closes off said outlet opening;
and,
(d) a piston mechanism having a wide top, a piston rod and a piston head, said piston head being movably located within said chamber unit and having a cross-sectional area which is the same as the inside of said chamber unit, said piston rod running from said piston head through the opening in the top of said chamber unit top, said piston mechanism being capable of upward movement by material entering the chamber unit when a squeezable container is squeezed and material enters said chamber unit through said inlet opening, and capable of downward movement when its wide top is pushed downward, so as to dispense material through said sidewall outlet opening, said piston mechanism having its wide top extend downward on the outside of said chamber unit so as to contact said gate and move said gate from its upward position to its downward position when said wide top is pushed downward.

2 more elements

A metered side dispensing cap system for attaching to squeezable containers, which comprises:

(a) a chamber unit having an inside and an outside, a bottom, sidewalls and a top and having an inlet opening in said bottom for flow of a material from a squeezable container into said chamber, having an outlet opening on a sidewall located near said bottom for dispensing material from the chamber in a metered amount, having an opening at said top for receiving a piston rod and having means for attachment of said chamber unit to an open neck of a squeezable container;
(b) a one-way valve located in said inlet opening on the bottom of said chamber unit, permitting flow of material from a squeezable container through said opening and preventing backflow of material back into said container;
(c) a gate located on the outside of said chamber unit near said outlet opening movably attached thereto so as to be movable vertically to an upward position and to a downward position whereby, in said upward position, said outlet opening remains open and, in said downward position, said gate closes off said outlet opening;
and,
(d) a piston mechanism having a wide top, a piston rod and a piston head, said piston head being movably located within said chamber unit and having a cross-sectional area which is the same as the inside of said chamber unit, said piston rod running from said piston head through the opening in the top of said chamber unit top, said piston mechanism being capable of upward movement by material entering the chamber unit when a squeezable container is squeezed and material enters said chamber unit through said inlet opening, and capable of downward movement when its wide top is pushed downward, so as to dispense material through said sidewall outlet opening, said piston mechanism having its wide top extend downward on the outside of said chamber unit so as to contact said gate and move said gate from its upward position to its downward position when said wide top is pushed downward;
and,
(e) at least two gripping extensions protruding outwardly from areas near the bottom of said system.

4 more elements

Dependencies are inferred from the claim text.