Hoisting sling
OwnerDorris W. Princeinventor
Life of this patent
Estimating the term…
Abstract
A hoisting sling is provided that in one embodiment (100) features a pivot assembly (4) secured to at least one end of a flexible elongate lifting element such as a cable, rope or chain. A cross bar (6) is pivotally mounted in assembly (4) and is operative to pivot to a position enabling assembly (4) to be inserted through an opening in an object to be hoisted and thence pivot so as to bridge across the opening to enable the lifting element to hoist the object. In another embodiment (150), the pivot assembly (14) features a two-piece cross bar (18 and 18') that are operative to pivot towards each other to a position enabling assembly (14) to be inserted through the object opening and thence pivot away from each other to bridge across the opening.
Claims8
A hoisting sling comprising at least one elongate flexible lifting element secured to an end of a stationary member of a pivot assembly having at least one cross bar pivotally mounted thereto;
- said cross bar operative to pivot to a position effective to enable the cross bar to be inserted through an opening through an object to be hoisted and thence pivot to a position enabling the cross bar to bridge thereacross to enable the lifting element to hoist the object;
- said stationary member having a plurality of protuberances extending therefrom in respective axial spaced-apart relationship to each other and to the cross bar;
- a locking plate axially movable along the stationary member and having at least one slot extending outwardly from an inner periphery surrounding an opening therewith through which the stationary member is received;
- said protuberances respectively operative to prevent the locking plate from moving axially away from the object when not in registration with the slot;
- and
- said protuberances respectively operative to be received through the slot upon registration therewith to enable the locking plate to be moved axially away from the object so as to enable the cross bar to be pivoted for removal from the object opening.
A hoisting sling comprising at least one elongate flexible lifting element secured to an end of a stationary member of a pivot assembly having at least one cross bar pivotally mounted thereto;
- said cross bar operative to pivot to a position effective to enable the cross bar to be inserted through an opening through an object to be hoisted and thence pivot to a position enabling the cross bar to bridge thereacross to enable the lifting element to hoist the object;
- said stationary member having a plurality of protuberances extending therefrom at a location in axial spaced-apart relationship to the cross bar;
- a locking plate axially movable along the stationary member and having a plurality of slots extending outwardly from an inner periphery surrounding an opening therethrough through which the stationary member is received;
- said protuberances operative to prevent the locking plate from moving axially away from the object when not in registration with the slots;
- and
- said protuberances operative to be respectively received through the slots upon registration therewith to enable the locking plate to be moved axially away from the object so as to enable the cross bar to be pivoted for removal from the object opening.
Dependencies are inferred from the claim text.