PLUG-IN CONNECTION ON PIPES AND HOSES WITH A PIPE DETENT RING

• US 20090102181A1
• Filed: 01/13/2006
• Published: 04/23/2009
• Est. Priority Date: 10/21/2005
• Status: Abandoned Application

• Current Assignee: Henn GmbH & Co KG.
• Original Assignee: Henn GmbH & Co KG.
• Inventors: Hartmann, Harald
• Application Number:
  US12/091,027
• Publication Number:
  US 20090102181A1
• Time in Patent Office: Days
• US Class Current: 285/26
• CPC Class Codes: F02B 37/00 Engines characterised by provision of pumps driven at least for part of the time by exhaust
• CPC Class Codes: F02M 35/10144 Connections of intake ducts to each other or to another device
• CPC Class Codes: F16L 37/0885 with access to the split elastic ring from a radial or tangential opening in the coupling

Abstract

The invention relates to a plug-in connection for pipes and tubes, said connection a tubular plug (20) which can be respectively connected to a pipe and/or a tube with a front side thereof and can be inserted into each in a sealing manner with the other front side thereof and engaged together in a secure, axially form-fitting manner. The connecting piece (1) comprises a tube engaging ring (3) on the tube (2) thereof, which forms an engaging groove (7) in which a catch spring (24) of the plug (20) at least partially engages, the tube engaging ring (3) being embodied as a part which is separate from the connecting piece (1) and secured thereon in a form-fitting manner with little play, or fixed thereto in a form fitting or fictionally engaged manner without play. It is advantageous that the plug-in connection can be produced in an essentially simple manner and can also be subjected to an essentially higher axial load.

Claims

1. A plug-in connection on pipes and hoses, said connection comprising a tubular connecting piece (1) and a tubular plug (20), which can be connected with one front end in each case to a pipe and/or hose, and which can be plugged into one another with their other front ends in a sealing manner and locked together in an axially form-fitting securing manner, said connecting piece (1) having on its pipe (2) a pipe detent ring (3) that forms a detent groove (7), into which a detent spring (24) of the plug (20) engages in a detenting manner at least partly, characterized in that the pipe detent ring (3) is implemented as a part that is separate from the connecting piece (1) and secured to the same form-fittingly with little play, or fixed to it in a form-fitting and frictionally engaging manner without play.

2. A plug-in connection according to claim 1, characterized in that the pipe detent ring (3) is situated on the outer periphery of the pipe (2) of the connecting piece (1).

3. A plug-in connection according to claim 1 or 2, characterized in that the sealing surface (6) of the connecting piece (1) is situated closer to its front end on the plug side than its detent groove (7) of the detent ring (3) and that the detent spring (24) of the plug (20) is situated closer to its front end on the connecting piece side than its gasket (23).

4. A plug-in connection according to any of claims 1 through 3, characterized in that the seal between the connecting piece (1) and plug (20) occurs by means of an annular gasket (23) of the plug (20), which contacts a sealing surface (6) of the connecting piece (I) in a sealing manner, and the sealing surface (6) of the connecting piece (1) has a purely cylindrical form and no radial indentations or convexities.

5. A plug-in connection according to any of claims 1 through 4, characterized in that the detent connection between the detent spring (24) of the plug (20) and the detent groove (7) of the pipe detent ring (3) of the connecting piece (1) is implemented either so as to not be sealing or so as to be sealing for the entire plug-in connection.

6. A plug-in connection according to any of claims 1 through 5, characterized in that the pipe detent ring (3) is secured or fixed on the connecting piece (1) by means of at least one radially outwardly and/or radially inwardly extending projection/recess of the connecting piece (1).

7. A plug-in connection according to claim 6, characterized in that the at least one radial projection/recess is implemented in the form of at least one circumferential uninterrupted or interrupted press groove (5) in the connecting piece (1).

8. A plug-in connection according to any of claims 1 through 5, characterized in that the pipe detent ring (3) is bonded to the connecting piece (1) by means of a glued connection and/or welded/soldered connection.

9. A plug-in connection according to any of claims 1 through 8, characterized in that the connecting piece (1), the pipe detent ring (3) and the plug (20) are formed of metal and/or plastic.

10. A plug-in connection according to claim 9, characterized in that the connecting piece (1) is formed of plastic and that the pipe detent ring (3) is produced of metal and/or plastic as a separate part and injection-molded onto or into the connecting piece (1).

11. A plug-in connection according to any of claims 1 through 10, characterized in that for plugging the connecting piece (1) and the plug (20) into one another, the detent ring (3) of the connecting piece (1) has a relatively flat detent ramp (9), to which a relatively small radius (11) adjoins, which passes over into the detent groove (7) via an approximately radially extending wall section.

12. A plug-in connection according to any of claims 7 through 11, characterized in that the at least one radial projection/recess, especially the press groove (7), engages into the radially inward side of the detent ramp (9) in a form-fitting and frictionally engaging manner.

13. A plug-in connection according to any of claims 1 through 12, characterized in that the pipe detent ring (3) is designed as two parts and consists of a detent ring (13) that is proximal to the plug and an adjoining lock ring (12), which in particular is integral in terms of material, that is situated away from the plug, wherein the detent ring (13) serves for the detent connection to the plug (20), whereas the lock ring (12) serves for centering the detent connection and as an axial end-stop limit.

14. A plug-in connection according to any of claims 1 through 13, characterized in that an anti-twist protection in the form of a cam (4) is provided on the pipe detent ring (3), to prevent the relative twisting movement between the connecting piece (1) and plug (20).

15. A plug-in connection according to claim 14, characterized in that the cam (4) is produced from the material of the pipe detent ring (3) by cold forming, e.g., by means of flanging or by pushing out lobes.