Flex accommodating cable terminations
View Patent ↗Cable terminations having features which reduce stress in the transition between the potted region and the freely flexing region of a cable when the cable flexes laterally with respect to the anchor. Several favorable geometries are disclosed. The use of a supplemental buffer material to reduce stress is also disclosed.
1. A flex-accommodating cable termination on an end of a synthetic cable, comprising:
a. an anchor, having a first side and a second side;
b. a passage passing completely through said anchor from said first side to said second side;
c. said passage including a cable locking region proximate said second side of said anchor;
d. wherein said cable is potted into said cable locking region using a cross-linking adhesive, thereby dividing said cable into a locked portion held within said cable locking region and a freely flexing portion extending out said first side of said anchor;
e. a smoothly curved expansion joining said passage to said first side of said anchor; and
f. wherein said freely flexing portion of said cable lying proximate said smoothly curved expansion is completely unencumbered so that it can bend around said smoothly curved expansion when said freely flexing portion is angularly offset from said anchor.
2. A flex-accommodating cable termination as recited in claim 1 , wherein said smoothly curved expansion is a circular expansion having a radius at least as large as the radius of said cable.
3. A flex-accommodating cable termination as recited in claim 1 , wherein said straight portion is at least twice as long as the radius of said cable.
4. A flex-accommodating cable termination on an end of a synthetic cable, comprising:
a. an anchor, having a first side and a second side;
b. a passage passing completely through said anchor from said first side to said second side;
c. said passage including a cable locking region proximate said second side of said anchor;
d. wherein said cable is potted into said cable locking region using a cross-linking adhesive, thereby dividing said cable into a locked portion held within said cable locking region and a freely flexing portion extending out said first side of said anchor;
e. wherein said cable locking region includes a first expansion, having a small portion and a large portion, wherein said large portion opens into said second side of said anchor;
f. said passage including a straight portion connected to said small portion of said first expansion;
g. said passage including a smoothly curved second expansion connected to said straight portion; and
h. wherein said freely flexing portion of said cable lying proximate said smoothly curved expansion is completely unencumbered so that it can bend around said smoothly curved expansion when said freely flexing portion is angularly offset from said anchor.
5. A flex-accommodating cable termination as recited in claim 4 , wherein said smoothly curved second expansion is a circular expansion having a radius at least as large as the radius of said cable.
6. A flex-accommodating cable termination as recited in claim 4 , wherein said cable is constrained by an encasing jacket over the portion of said cable proximate the junction between said locked portion and said freely flexing portion.
7. A flex-accommodating cable termination as recited in claim 4 , wherein said straight portion is at least twice as long as the radius of said cable.
8. A flex-accommodating cable termination on an end of a synthetic cable, comprising:
a. an anchor, having a first side and a second side;
b. a passage passing completely through said anchor from said first side to said second side;
c. said passage including a cable locking region proximate said second side of said anchor;
d. cable locking means for locking said end of said cable to said anchor at said cable locking region, so that said cable is divided into a locked portion held within said cable locking region and a freely flexing portion extending out said first side of said anchor;
e. a smoothly curved expansion joining said passage to said first side of said anchor;
f. a straight portion between said cable locking region and said smoothly curved expansion; and
g. an encasing jacket around said cable extending from a point proximate said straight portion to a point beyond said smoothly curved expansion, wherein said encasing jacket is flexible enough to allow said cable to bend around said smoothly curved expansion.
9. A flex-accommodating cable termination as recited in claim 8 , wherein said smoothly curved expansion is a circular expansion having a radius at least as large as the radius of said cable.
10. A flex-accommodating cable termination as recited in claim 9 , wherein said cable locking means comprises potting said end of said cable into said cable locking region using a cross-linking adhesive.
11. A flex-accommodating cable termination as recited in claim 8 , wherein said straight portion is at least twice as long as the radius of said cable.
12. A flex-accommodating cable termination as recited in claim 8 , wherein said encasing jacket extends just past said smoothly curved expansion but no further.
13. A flex-accommodating cable termination as recited in claim 8 , wherein said straight portion is at least twice as long as the radius of said cable.
14. A flex-accommodating cable termination on an end of a synthetic cable, comprising:
a. an anchor, having a first side and a second side;
b. a passage passing completely through said anchor from said first side to said second side;
c. said passage including a cable locking region proximate said second side of said anchor;
d. cable locking means for locking said end of said cable to said anchor at said cable locking region, so that said cable is divided into a locked portion held within said cable locking region and a freely flexing portion extending out said first side of said anchor;
e. wherein said cable locking region includes a first expansion, having a small portion and a large portion, wherein said large portion opens into said second side of said anchor;
f. said passage including a straight portion connected to said small portion of said first expansion;
g. said passage including a smoothly curved second expansion connected to said straight portion; and
h. an encasing jacket around said cable extending from a point proximate said straight portion to a point beyond said smoothly curved expansion, wherein said encasing jacket is flexible enough to allow said cable to bend around said smoothly curved expansion.
15. A flex-accommodating cable termination as recited in claim 14 , wherein said smoothly curved second expansion is a circular expansion having a radius at least as large as the radius of said cable.
16. A flex-accommodating cable termination as recited in claim 14 , wherein said cable locking means comprises potting said end of said cable into said cable locking region using a cross-linking adhesive.
17. A flex-accommodating cable termination on an end of a synthetic cable, comprising:
a. an anchor, having a first side and a second side;
b. a passage passing completely through said anchor from said first side to said second side;
c. said passage including a cable locking region proximate said second side of said anchor;
d. cable locking means for locking said end of said cable to said anchor at said cable locking region, so that said cable is divided into a locked portion held within said cable locking region and a freely flexing portion extending out said first side of said anchor;
e. a smoothly curved expansion joining said passage to said first side of said anchor;
f. a straight portion between said cable locking region and said smoothly curved expansion; and
g. an encasing jacket around said cable extending from a point proximate said straight portion to a point adjacent to said smoothly curved expansion, wherein said encasing jacket is flexible enough to allow said cable to bend around said smoothly curved expansion.