Pipe joints or couplings – Essential catch – With manipulator
Patent
1998-04-22
2000-07-11
Nicholson, Eric K.
Pipe joints or couplings
Essential catch
With manipulator
285319, 285921, F16L 3712
Patent
active
060861193
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention pertains to a connector for accommodating a tube with a circumferential locking ring. The tube may consist of the end of a stable metal tube, e.g., a metal tube used for fuel lines. However, it may also consist of rigid plastic or another common injection-molded material that can be conventionally connected to a hose or tube.
Such a plug connector is known as disclosed in EP 0,605,801 A1. In this disclosure, the end faces of the support bodies have the shape of a circular arc and are directed radially outward in a radial manner to the axis of the housing. The support bodies abut the inner surface of the recess on the side of the opening with end faces when a tensile force is exerted upon the tube. In the practical application of this connector, it was determined that the thusly generated holding force was not sufficient for ensuring a reliable fuel coupling. If high tensile forces are exerted upon the tube, the support bodies prematurely slide off laterally such that the coupling is separated.
Thus, it is an object of the invention to produce a connector of this type in such a way that the holding forces required for safety can be satisfactorily generated. This objective is attained with the present invention, wherein the angle of the end faces of the support members, extend at an angle to a radial plane of preferably 25.degree. to 45.degree..
Due to the angle of the end faces according to the invention, a wedge effect is attained on the inner surface of a recess when tensile forces are exerted upon the connector. The higher the tensile forces, the higher the force with which the support members are pressed against the locking ring. Thus, it is possible to more than double the holding force with this arrangement.
According to another feature of the invention, the holding surfaces of the holding edges that adjoin the locking ring may be outwardly inclined in opposition to the insertion direction such that the holding edges abut the locking ring as close to the base as possible.
BRIEF DESCRIPTION OF THE DRAWING
A preferred embodiment of the invention is illustrated in the accompanying figures and described in detail below. The figures show:
FIG. 1 is a longitudinal section through an assembled connector housing after the insertion of a tube, namely in a nonstressed state;
FIG. 2 is the same arrangement as described in FIG. 1 above, however tensile forces are exerted upon the tube;
FIG. 3 is a side view of a retaining spring and a partial section through the upper support member;
FIG. 4 is a front view of the same retaining spring, and
FIG. 5 is an exploded view of the connector housing with the corresponding components before assembly.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
The connector shown in the figures consists of a receptacle housing 1 and a retaining spring 2 that is manufactured from a hard-elastic plastic material. The connector serves for receiving a tube 3 provided with a circumferential locking ring 4. This tube 3 may consist of the end of a tube of rigid material or a rigid adapter that can be conventionally connected to the end of a tube of softer material.
The receptacle housing 1 according to FIG. 1 consists of a cylindrical housing wall 5 with a chamber 6 for the plug-in that contains several shoulders. One shoulder forms a limit stop 8 on the end of the chamber 6. A cylindrical connector piece 7 forms an axial extension of the chamber and serves for connection with a not-shown fluid line. The chamber 6 begins with a first region 6', the inside diameter of which corresponds to the outside diameter of the tube 3. A second region 6" has a larger diameter and is arranged adjacent thereto. The wider diameter of the second region is provided for accommodating two ring seals 9, an intermediate ring 10, and a spacer ring 20, the inside diameter of which also corresponds to the outside diameter of the tube 3.
Two diametrically opposed openings 11 (see FIG. 5) are situated in the housing wall 5 within the front insertion region of the recep
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A. Raymond & Cie
Binda Greg
Nicholson Eric K.
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