Cable strain relief for cables, in particular fiber optic cables

Patent metadata

Field	Value
Publication number	US-9341804-B2
Application number	US-201214347955-A
Country	US
Kind code	B2
Filing date	Aug 28, 2012
Priority date	Oct 6, 2011
Publication date	May 17, 2016
Grant date	May 17, 2016

Abstract

The invention relates to a means of cable strain relief ( 1 ) comprising a crimping sleeve ( 3 ) for the mechanical operative connection of a cable ( 5 ) to a crimping neck ( 2 ), wherein the crimping sleeve ( 3 ) is used in the crimped state for clamping a textile braid ( 7 ) of the cable ( 5 ) intended for stain relief between the crimping sleeve ( 3 ) and the crimping neck ( 2 ). At its cable-side end, the crimping sleeve ( 3 ) comprises a deformable plastic sleeve ( 4 ) that produces a mechanical operative connection in the crimped state between an exterior jacket ( 6 ) of the cable ( 5 ) and the crimping sleeve ( 3 ).

First claim

The invention claimed is:

1. A cable strain relief device ( 1 ) comprising:
a crimp sleeve ( 3 ) for mechanically operatively connecting a cable ( 5 ) to a crimp neck ( 2 ), the crimp sleeve ( 3 ) being used, in a crimped state, to pinch a fibre braid ( 7 ) of the cable ( 5 ), which braid is provided for strain relief, between the crimp sleeve ( 3 ) and the crimp neck ( 2 ), wherein at a crimp neck-side end the crimp sleeve ( 3 ) is crimped to the crimp neck ( 2 ) and at a cable-side end the crimp sleeve ( 3 ) includes a deformable plastic sleeve ( 4 ) which is arranged in the crimp sleeve ( 3 ) and which, in the crimped state, is crimped between an outer sheath ( 6 ) of the cable ( 5 ) and the crimp sleeve ( 3 ) and produces a mechanical operative connection that connects an inner surface of the crimp sleeve ( 3 ) at the cable-side end to the outer sheath ( 6 ) of the cable ( 5 ).

2. The cable strain relief device ( 1 ) according to claim 1 , wherein an inner diameter of the plastic sleeve ( 4 ) matches a diameter of the outer sheath ( 6 ) of the cable ( 5 ).

3. The cable strain relief device ( 1 ) according to claim 1 , wherein the plastic sleeve ( 4 ) is formed so as to be substitutable during manufacture.

4. The cable strain relief device ( 1 ) according to claim 1 , wherein an interior of the plastic sleeve ( 4 ) includes operative connection means ( 12 ) which, in the crimped state, enter into an operative connection with the cable outer sheath ( 6 ).

5. The cable strain relief device ( 1 ) according to claim 1 , wherein the plastic sleeve ( 4 ) comprises a more flexible material, than the crimp sleeve ( 3 ).

6. The cable strain relief device ( 1 ) according to claim 1 , wherein the plastic sleeve ( 4 ) includes two or more slots.

7. The cable strain relief device (l) according to claim 1 wherein the plastic sleeve ( 4 ) includes an anti-kink hush at a rear end.

8. The cable strain relief device ( 1 ) according to claim 1 , wherein the plastic sleeve ( 4 ) is operatively connected to the crimp sleeve ( 3 ) by injection moulding.

9. The cable strain relief device ( 1 ) according to claim 1 , wherein the plastic sleeve ( 4 ) is pressed or welded into the crimp sleeve ( 3 ) or glued in place therein.

10. A method for producing a cable strain relief device ( 1 ), wherein the method comprises the following steps:
a. sliding a plastic sleeve ( 4 ) onto a cable sheath ( 6 );
b. sliding a crimp sleeve ( 3 ) onto the cable sheath ( 6 ) such that the plastic sleeve ( 4 ) is arranged in the crimp sleeve ( 3 );
c. arranging a fibre braid ( 7 ) under the cable sheath ( 6 ) and freeing the fibre braid ( 7 ) from the cable sheath ( 6 ) over a defined length;
d. distributing the fibre braid over a clamping face ( 13 ) of a crimp neck ( 2 );
e. arranging a first end of the crimp sleeve ( 3 ) over the crimp neck ( 2 ) and arranging the plastic sleeve ( 4 ) over the cable sheath ( 6 ) and between a second end of the crimp sleeve ( 3 ) and the cable sheath ( 6 ) in an operatively interconnected manner;
f. crimping the crimp sleeve ( 3 ) onto the crimp neck ( 2 ), wherein the plastic sleeve ( 4 ) is operatively connected to the cable sheath ( 6 ).

11. The cable strain relief device ( 1 ) according to claim 1 , wherein the fibre braid is pinched between a clamping face ( 13 ) of the crimp neck ( 2 ) and the inner surface at the crimp neck-side end of the plastic sleeve ( 4 ).

Assignees

• Scopic Nesa
• Greub Daniel
• Zaina Patrick
• Gadmer Laif
• Huber+Suhner Ag

Inventors

• Scopic Nesa
• Greub Daniel
• Zaina Patrick
• Gadmer Laif

Classifications

• G02B6/44765

  with means for strain-relieving to exterior cable layers · CPC title

• G02B6/3888 Primary

  Protection from over-extension or over-compression · CPC title

• B23P11/005

  by expanding or crimping · CPC title

• G02B6/3887

  Anchoring optical cables to connector housings, e.g. strain relief features · CPC title

• H02G15/007

  Devices for relieving mechanical stress · CPC title