Line coupling and container having the same

Patent metadata

Field	Value
Publication number	US-11248728-B2
Application number	US-201816114865-A
Country	US
Kind code	B2
Filing date	Aug 28, 2018
Priority date	Aug 28, 2017
Publication date	Feb 15, 2022
Grant date	Feb 15, 2022

Abstract

A line coupling having a housing which has a tube connection piece and a housing head. A passage duct extends from a first opening, which is formed by the tube connection piece, to a second opening, which is formed by the housing head. A tube connection structure is arranged in the passage duct. The tube connection structure is connected in a form-fitting manner via first coupling means to a first end of an inner tube which extends out of the housing head through the second opening. The section of the passage duct between the first opening and tube connection structure and inner tube form a flow duct for fluid. A container is also disclosed having a container housing which forms a container hollow space and a container opening. The container opening is formed by an outwardly projecting connection piece, and has a line coupling.

First claim

The invention claimed is:

1. Line coupling comprising a housing which has a tube connection piece and a housing head, wherein a passage duct extends from a first opening, which is formed by the tube connection piece, to a second opening, which is formed by the housing head, wherein a tube connection structure is arranged in the passage duct, wherein the tube connection structure is connected in a form-fitting manner via first coupling means to a first end of an inner tube which extends out of the housing head through the second opening, and wherein that section of the passage duct between the first opening and the tube connection structure and the inner tube form a flow duct for fluid, wherein the tube connection structure is formed by a connection element which is fixed in a form-fitting manner and/or materially bonded manner in a receiving seat of the housing, wherein the connection element forming the tube connection structure has, on the outer side, at least three cylindrical steps by way of which the connection element is seated in steps of the receiving seat, wherein an outer surface of the at least three cylindrical steps of the connection element fit closely and over the entire range of the at least three cylindrical steps with a surface, which is directed to the inside of the housing, of the steps of the receiving seat, wherein, between the inner tube and the housing head, there is formed an annular gap, which is of open form in the direction of the second opening, wherein the at least three cylindrical steps are of progressively decreasing diameter by way of which the connection element is seated in steps of the receiving seat, wherein radially-outwardly-directed sections of the outer surface of the at least three cylindrical steps of the connection element are parallel to a longitudinal axis of the passage duct adjacent the connection element, wherein axially-directed sections of the outer surface of the at least three cylindrical steps of the connection element are perpendicular to the longitudinal axis of the passage duct adjacent the connection element, wherein an intermediate cylindrical step of the at least three cylindrical steps of the connection element is unidirectional over its radially-outwardly-directed section and between preceding and succeeding axially-directed sections of preceding and succeeding cylindrical steps of the at least three cylindrical steps of the connection element, wherein a fixing ring is inserted into the housing head for retaining a sealing ring in a seal seat, the fixing ring having a substantially L-shaped cross-sectional profile.

2. Line coupling according to claim 1 , wherein the tube connection structure is of sleeve-like form.

3. Line coupling according to claim 1 , wherein the housing forms, on the inner side of the housing head, the seal seat in which the sealing ring is arranged.

4. Line coupling according to claim 3 , wherein, on an inner side of the housing head, the housing has, in front of and/or behind the seal seat, at least one cylindrical centering step.

5. Line coupling according to claim 1 , wherein the inner tube has a second end on which there is arranged a distributor cap which at least partially deflects the flow direction in the region of the second end of the inner tube.

6. Line coupling according to claim 5 , wherein the second end of the inner tube is connected in a form-fitting manner via second coupling means to the distributor cap.

7. Line coupling according to claim 1 , wherein closure means for the fixing of the housing head are arranged on the housing, the closure means is a securing bracket, the housing head has apertures located therein, and wherein the securing bracket is able to project into an interior of the housing head via the apertures.

8. Line coupling according to claim 1 , wherein the passage duct exclusively widens in the direction of the second opening from the tube connection structure.

9. Line coupling according to claim 1 , wherein the passage duct exclusively widens in the direction of the first opening from the tube connection structure.

10. Line coupling according to claim 1 , wherein a butt seam is formed in the passage duct between the tube connection structure and the first opening.

11. Container having a container housing which forms a container hollow space and a container opening, wherein the container opening is formed by an outwardly projecting connection piece, and having a line coupling according to claim 1 , wherein the housing head of the line coupling covers the container opening, and wherein the inner tube of the line coupling projects into the container hollow space through the connection piece of the container housing.

12. Container according to claim 11 , wherein the connection piece has an outer cylindrical sealing surface which, together with the sealing ring forms a seal.

13. Container according to claim 11 , wherein the connection piece has closure means which correspond to closure means of the housing of the line coupling such that the housing head is fixed to the connection piece.

14. Container according to claim 11 , wherein the annular gap is formed between the inner tube and the connection piece, wherein the inner tube and the connection piece do not make contact at any position.

15. Container according to claim 11 , wherein the connection piece has, on the outside, at least one cylindrical centering step which corresponds to a cylindrical centering step of the housing head.

16. Line coupling according to claim 1 , wherein the connection element forming the tube connection structure has, on the outer side, exactly three, cylindrical steps by way of which the connection element is seated in steps of the receiving seat.

17. Line coupling according to claim 1 , wherein surface-to-surface contact is made between the outer surface of the at least three cylindrical steps and the surface of the steps of the receiving seat.

18. Line coupling according to claim 1 , wherein all of the at least three cylindrical steps of the connection element are unidirectional over their full radially-outwardly-directed sections.

19. Line coupling according to claim 1 , wherein the at least three cylindrical steps of the connection element and the steps of the receiving seat lack female and male threadings thereamong.

Assignees

• Norma Germany Gmbh

Inventors

• Jacksteit Bruno
• Unger Dennis

Classifications

• B65D83/32

  Dip-tubes · CPC title

• Y10T137/86348

  Tank with internally extending flow guide, pipe or conduit · CPC title

• F16L59/06

  Arrangements using an air layer or vacuum · CPC title

• B65D55/04

  Spring clips, e.g. of wire or of sheet metal · CPC title

• F16L47/02

  Welded joints; Adhesive joints · CPC title