초록 ▼

A sling (10, 10', FIGS. 1-3) for lifting a heavy work piece (e.g. a pipe section; FIGS. 5, 6), including a single strap made of flexible, in-elastic fabric material over-lappingly converging upon itself to form a top strap member and a bottom strap member to form a two-ply strap member; a first, int

A sling (10, 10', FIGS. 1-3) for lifting a heavy work piece (e.g. a pipe section; FIGS. 5, 6), including a single strap made of flexible, in-elastic fabric material over-lappingly converging upon itself to form a top strap member and a bottom strap member to form a two-ply strap member; a first, integral, eye-loop end; a second, integral eye-loop end; at least one, intermediately spaced, bi-directional loop (50, 150a-d) coupled to the two-ply strap member between the first and second, eye-loop ends. Each bi-directional loop serves to distribute suspension stresses in two directions, longitudinally, along the lifting sling when used to complete the closed lifting loop and distribute pulling forces in either of two directions, longitudinally, along the sling when pulled in any or either longitudinal direction. Additionally, since crane time is very expensive to operate, a sling system which can accommodate the lifting of a plurality of heavy pipes or other heavy objects simultaneously is provided (FIGS. 8-7).

대표청구항 ▼

[ What is claimed is:] [1.]1. A sling for lifting a heavy work piece, comprising:a single strap made of flexible, in-elastic fabric material over-lappingly converging upon itself to form a top strap member and a bottom strap member to form a two-ply strap member;a first, integral, terminal, eye-loop

[ What is claimed is:] [1.]1. A sling for lifting a heavy work piece, comprising:a single strap made of flexible, in-elastic fabric material over-lappingly converging upon itself to form a top strap member and a bottom strap member to form a two-ply strap member;a first, integral, terminal, eye-loop end;a second, integral, terminal end; andat least one, intermediately spaced, bi-directional loop coupled to said two-ply strap member between said first eye-loop end and said second end, said at least one bi-directional loop being sandwiched between said top strap member and said bottom strap member.