Sling
The disclosure provides a sling including a sleeve, a first eye formed by a first splice, and a second eye formed by a second splice. The sleeve includes braided strands and has a first end portion, a second end portion, and an intermediate portion between. The sleeve also defines a hollow inner volume. The first splice is made by the first end portion extending into and along part of the hollow inner volume proximate the first eye. The second splice is made by the second end portion extending into and along part of the hollow inner volume proximate the second eye. A hollow load bearing portion is defined in the intermediate portion between the first splice and the second splice.
1. A sling comprising:
a sleeve including braided strands and having a first end portion, a second end portion, and an intermediate portion therebetween, the sleeve defining a hollow inner volume;
a first eye formed by a first splice, the first splice including the first end portion extending into and along part of the hollow inner volume proximate the first eye; and
a second eye formed by a second splice, the second splice including the second end portion extending into and along part of the hollow inner volume proximate the second eye;
wherein a hollow load bearing portion is defined in the intermediate portion between the first splice and the second splice; and
wherein each of the first splice and the second splice include a locking Brummel splice.
2. The sling according to claim 1 , wherein the braided strands are in a 24×3 configuration.
3. The sling according to claim 1 , wherein the braided strands are in a 32×3 configuration.
4. The sling according to claim 3 , wherein the sling has a total denier of high modulus polyethylene (HMPE) of about 35,328,000.
5. The sling according to claim 3 , wherein the sling has a breaking force of about 45 Te when subjected to a CI-1500 test method as defined in a May 2015 publication by the Cordage Institute.
6. The sling according to claim 1 , wherein the braided strands are in one of the following configurations: 12×3, 16×3, 20×2, 20×3, 24×1, 24×2, 24×3, 32×1, 32×2, 32×3, 48×1, 48×2, or 48×3.
7. The sling according to claim 1 , wherein the first end portion has a length of 21 times a diameter of the sleeve, and said length extends into the hollow inner volume adjacent the first eye.
8. The sling according to claim 1 , wherein the braided strands are made of high modulus polyethylene (HMPE) fibers, liquid crystal polymers, or aramid fibers.
9. The sling according to claim 8 , wherein an outer surface of the HMPE fibers, the liquid crystal polymers, or the aramid fibers includes a polyurethane coating.
10. The sling according to claim 1 , wherein the load bearing portion has a width and a diameter, and wherein the load bearing portion has a flattened width of about 1.5-2 times the diameter when under a load.
11. The sling according to claim 1 , wherein the sling exerts about 40% to about 55% less pressure on a lifting surface as compared to a 12×1 rope without a hollow portion, and wherein the sling and the 12×1 rope have similar diameters and the same HMPE fibers.
12. A method for manufacturing a sling, the method comprising:
forming a hollow sleeve including braided strands, the hollow sleeve having a first end portion, a second end portion, and an intermediate portion therebetween, the sleeve defining a hollow inner volume;
forming a first eye by splicing the first end portion to extend into and along part of the hollow inner volume of the hollow sleeve; and
forming a second eye by splicing the second end portion to extend into and along part of the hollow inner volume of the hollow sleeve
wherein a hollow load bearing portion is formed in the intermediate portion between the first eye and the second eye.
13. The method according to claim 12 , wherein forming the first eye includes using a Brummel splice technique; and wherein forming the second eye includes using the Brummel splice technique.
14. The method according to claim 13 , wherein forming the first eye includes arranging the first end portion such that the first end portion of the sleeve extends into the hollow inner volume, the first end portion having a length of 21 times a diameter of the sleeve.
15. The method according to claim 14 , wherein forming the second eye includes arranging the second end portion such that the second end portion of the sleeve extends into the hollow inner volume, the second end portion having a length of 21 times a diameter of the sleeve.
16. A method for using a sling, the method comprising:
providing the sling, the sling including
a sleeve including braided strands and having a first end portion, a second end portion, and an intermediate portion therebetween, the sleeve defining a hollow inner volume,
a first eye formed by a first splice with the first end portion extending into and along part of the hollow inner volume proximate the first eye, and
a second eye formed by a second splice with the second end portion extending into and along part of the hollow inner volume proximate the second eye,
wherein a hollow load bearing portion is defined in the intermediate portion between the first splice and the second splice;
supporting a load to be lifted with the load bearing portion, the load bearing portion being flattened on a surface of the load;
attaching the first eye to a lifting apparatus;
attaching the second eye to the lifting apparatus; and
lifting the load with the sling.