Coaxial cartridge for multi-component materials and method of assembling a coaxial cartridge

Patent metadata

Field	Value
Publication number	US-11596972-B2
Application number	US-201917419861-A
Country	US
Kind code	B2
Filing date	Dec 5, 2019
Priority date	Jan 3, 2019
Publication date	Mar 7, 2023
Grant date	Mar 7, 2023

Abstract

A coaxial cartridge for multi-component materials includes a head part having an outlet, an inner tube forming a first storage compartment configured to store a first component inner tube forms part of the outlet, and an outer tube. The inner tube is arranged within the outer tube at a longitudinal axis that is common to both the inner tube and the outer tube. A space formed between the outer tube and the inner tube forms a second storage compartment configured to store a second component. The outer tube forms a further part of the outlet.

First claim

The invention claimed is:

1. A coaxial cartridge for multi-component materials, the coaxial cartridge comprising:
a head part having an outlet;
an inner tube having a space therein, the space forming a first storage compartment configured to store a first component, a part of the inner tube forming a part of the outlet;
an outer tube, the inner tube arranged within the outer tube at a longitudinal axis of the coaxial cartridge, with the longitudinal axis being common to both the inner tube and the outer tube, a space formed between the outer tube and the inner tube forming a second storage compartment configured to store a second component, and a part of the outer tube forms a further part of the outlet, the inner tube connected to the outer tube at first and second points of connection present at the head part, with the first and second points of connection being arranged at different positions at the head part, with the different positions being arranged spaced apart at different distances from the longitudinal axis, and the first point of connection formed at the outlet; and
a seal member disposed between the inner tube and the outer tube at the head part, the seal member surrounding the second point of connection.

2. The coaxial cartridge in accordance with claim 1 , wherein the first and second points of connection are different types of connections.

3. The coaxial cartridge in accordance with claim 1 , wherein the outlet and the first point of connection are disposed at a further distance from the longitudinal axis than the second point of connection; or the first point of connection is eccentrically arranged with respect to the longitudinal axis.

4. The coaxial cartridge in accordance with claim 1 , wherein the first point of connection is a radially outwardly projecting lip that is disposed at the part of the inner tube that projects into the part of the outer tube, with the radially outwardly projecting lip engaging a step-like portion disposed at the part of the outer tube into which the inner tube projects.

5. The coaxial cartridge in accordance with claim 1 , wherein the first point of connection is a snap fit connection disposed at the outlet between the inner tube and the outer tube.

6. The coaxial cartridge in accordance with claim 1 , wherein the second point of connection is disposed at a smaller distance from the longitudinal axis than the first point of connection.

7. The coaxial cartridge in accordance with claim 1 , wherein the second point of connection is disposed between an inner surface of the outer tube that abuts an outer surface of the inner tube at the head part.

8. The coaxial cartridge in accordance with claim 1 , wherein the second point of connection is a plug element disposed at the inner tube configured to cooperate with a counter plug element disposed at the outer tube.

9. The coaxial cartridge in accordance with claim 8 , wherein the counter plug element is configured to receive the plug element, with the plug element being press fit into the plug receiving element.

10. The coaxial cartridge in accordance with claim 1 , wherein the inner tube comprises a first cylindrical outlet portion as the part of the inner tube forming the part of the outlet that is inserted into a second cylindrical outlet portion disposed at the outer tube forming the further part of the outlet.

11. The coaxial cartridge in accordance with claim 10 , wherein the part of the inner tube that projects into the part of the outer tube is formed by the cylindrical outlet portion and the part of the outer tube into which the inner tube projects is formed by the cylindrical outlet portion disposed at the outer tube, one or more sealing members are disposed between the cylindrical outlet portion of the inner tube and the cylindrical outlet portion of the outer tube.

12. The coaxial cartridge in accordance with claim 1 , wherein the outlet is a side by side outlet comprising first and second outlets having first and second outlet openings.

13. The coaxial cartridge in accordance with claim 12 , wherein the first and second outlets comprise inner sealing surfaces.

14. The coaxial cartridge in accordance with claim 12 , wherein the first cylindrical outlet portion of the inner tube comprises a first passage leading from the first storage compartment to the first outlet opening of the outlet and a second passage leading from the second storage compartment to the second outlet opening of the outlet.

15. The coaxial cartridge in accordance with claim 12 , wherein an area of the first outlet opening differs from an area of the second outlet opening.

16. The coaxial cartridge in accordance with claim 1 , wherein the inner tube and the outer tube comprise projections that project from a respective end face formed at the head part into the first and second storage compartments, or
further comprising first and second pistons arranged in each storage chamber at an end of the coaxial cartridge that is disposed opposite of the head part, or the first and second storage compartments comprise respective two-component materials.

17. A method of assembling the coaxial cartridge, in accordance with claim 1 , the method comprising:
providing the outer tube having the part of the outlet formed at the head part of the outer tube,
inserting the inner tube into the outer tube, with the inner tube comprising a remaining part of the outlet;
connecting the inner tube to the outer tube at the first and second points of connection at the head part to form the coaxial cartridge with the first and second storage compartments, the first point of connection is formed at the outlet, and the second point of connection is formed between abutting surfaces of the inner tube and the outer tube.

18. A coaxial cartridge for multi-component materials, the coaxial cartridge comprising:
a head part having an outlet;
an inner tube having a space therein, the space forming a first storage compartment configured to store a first component, a part of the inner tube forming a part of the outlet; an outer tube, the inner tube arranged within the outer tube at a longitudinal axis of the coaxial cartridge, with the longitudinal axis being common to both the inner tube and the outer tube, a space formed between the outer tube and the inner tube forming a second storage compartment configured to store a second component, and a part of the outer tube forms a further part of the outlet, the inner tube connected to the outer tube at first and second points of connection present at the head part, with the first and second points of connection being arranged at different positions at the head part, with the different positions being arranged spaced apart at different distances from the longitudinal axis, the first point of connection formed at the outlet, and the second point of connection disposed between an inner surface of the outer tube that abuts an outer surface of the inner tube at the head part; and
a seal member formed between the inner tube and the outer tube at the head part, the seal member surrounding the second point of connection, and formed between the inner surface of the outer tube that abuts the outer surface of the inner tube.

19. A coaxial cartridge for multi-component materials, the coaxial cartridge comprising:
a head part having an outlet, the outlet being a side by side outlet comprising first and second outlets having first and second outlet openings and comprising inner sealing surfaces;
an inner tube having a space therein, the space forming a first storage compartme

Assignees

• Sulzer Mixpac Ag
• Medmix Switzerland Ag

Inventors

• Grünenfelder Ralf
• Remo Eberhard
• Turner Hayden

Classifications

• B65D81/325

  Containers having parallel or coaxial compartments, provided with a piston or a movable bottom for discharging contents · CPC title

• B05C17/00506 Primary

  Means for connecting the outlet element to, or for disconnecting it from, the hand tool or its container · CPC title

• B65B29/10

  Packaging two or more different substances isolated from one another in the package but capable of being mixed without opening the package, e.g. forming packages containing a resin and hardener isolated by a frangible partition · CPC title

• B29D99/00

  Subject matter not provided for in other groups of this subclass · CPC title

• B05C17/00559 Primary

  the different components being stored in coaxial chambers · CPC title