Patent #4,043,581 Tri-Flex® Wire Rope Slings provide the best combination of strength and flexibility. Because of the patented Tri-Flex® Sling construction, there is a large savings in material and machine costs in the larger sizes; this, combined with ease of use make Tri-Flex® Slings the only sling for smart buyers.
Basket Hitch equals D/d of 5/1 using finished diameter
(19) This product is a combination of three Tri-Flex® Wire Rope slings wrapped together helically to form a nine part finished body sling. After a heavy lift is finished, the product can be taken apart to form three individual Tri-Flex® slings for smaller lifting work. This product was developed for construction projects where there are a few heavy lifts. A superior strength sling because it has twelve parts of wire rope in the loop for greater strength than traditional nine part wire rope slings that have only ten parts of wire rope in the loops.
U.S. Patent #4,240,659 CN #1,082,755 British #2,029,796.