US3883170A — Hoisting shackle with quick release attachment me…

Claim 1

Independent Claim 266 words

A hoisting shackle system with a quick release attachment device for attaching a hoisting harness to a load at one or more attachment points, comprising in combination: a ring-shaped closed shackle body having an annular cavity giving it a shape similar to that of an upright hollow torus and being thus adapted to form an articulated, chain-link-type end member of a hoisting harness or the like of which a hook or end loop can reach through the central aperture of the torus, the shackle body having an upper arcuate portion in which the outer peripheral wall of the hollow torus structure is removed so as to leave a radially open, U-shaped cross-sectional wall profile around its annular cavity; an arcuate locking bolt received in the annular cavity of the shackle body so as to be guided therein for movement along the curvature of said annular cavity; a transverse radial slot in the lowermost portion of the shackle body which reaches upwardly a distance beyond the crosssectional space occupied by the locking bolt inside the annular cavity; an anchoring element capable of being fixedly attached to a load and having an upstanding eye portion with a transverse opening, the eye portion fitting into the radial slot of the shackle body in such a way that the locking bolt can be inserted through its opening, thereby attaching the anchoring element to the shackle body; and means for releasing the anchoring element from the shackle body, by retracting the locking bolt from its locked position in which it traverses said radial slot to a position outside the slot region.

Claim 2

Dependent Claim 266 words

A hoisting shackle system with a quick release attachment device for attaching a hoisting harness to a load at one or more attachment points, comprising in combination: a ring-shaped closed shackle body having an annular cavity giving it a shape similar to that of an upright hollow torus and being thus adapted to form an articulated, chain-link-type end member of a hoisting harness or the like of which a hook or end loop can reach through the central aperture of the torus, the shackle body having an upper arcuate portion in which the outer peripheral wall of the hollow torus structure is removed so as to leave a radially open, U-shaped cross-sectional wall profile around its annular cavity; an arcuate locking bolt received in the annular cavity of the shackle body so as to be guided therein for movement along the curvature of said annular cavity; a transverse radial slot in the lowermost portion of the shackle body which reaches upwardly a distance beyond the crosssectional space occupied by the locking bolt inside the annular cavity; an anchoring element capable of being fixedly attached to a load and having an upstanding eye portion with a transverse opening, the eye portion fitting into the radial slot of the shackle body in such a way that the locking bolt can be inserted through its opening, thereby attaching the anchoring element to the shackle body; and means for releasing the anchoring element from the shackle body, by retracting the locking bolt from its locked position in which it traverses said radial slot to a position outside the slot region.

Claim 3

Dependent Claim 51 words

A hoisting shackle system as defined in claim 1, wherein: the load is a concrete body, such as a building component or the like; and the anchoring element is permanently embedded in the concrete of the load in such a way that only its upstanding eye portion protrudes from the concrete.

Claim 4

Dependent Claim 89 words

A hoisting shackle system as defined in claim 1, wherein: the load is a prefabricated building component of concrete; the anchoring element is permanently embedded in the concrete of the building component in such a way that only its upstanding eye portion protrudes from the concrete; and the building component includes a recess in its surface surrounding said eye portion, the recess having an outline which matches approximately that portion of the shackle body which reaches into the recess when the shackle body is attached to the anchoring element.

Claim 5

Dependent Claim 52 words

A hoisting shackle system as defined in claim 3, wherein: the anchoring element is a steel bar of flat section whose upper end portion forms the eye portion and whose lower end portion includes at least one laterally extending extremity by which it is retained in the concrete of the building component.

Claim 6

Dependent Claim 53 words

A hoisting shackle system as defined in claim 3, wherein: the anchoring element is a bent steel rod in the shape of a twin hook, with a central hairpin-type loop forming the upwardly extending eye portion and two hook portions on its lower end retaining it in the concrete of the building component.

Claim 7

Dependent Claim 64 words

A hoisting shAckle system as defined inclaim 1, wherein: the eye portion of the anchoring element has a converging outline at its uppermost extremity, and the radial slot in the shackle body has a matchingly shaped bottom portion which, when pressed against the extremity of the anchoring element, centers the latter inside the slot for alignment of its transverse opening with the locking bolt.

Claim 8

Dependent Claim 66 words

A hoisting shackle system as defined in claim 1, wherein: the locking bolt is of such a length that one of its extremities reaches upwardly into the open, U-shaped portion of the shackle body when the other end portion traverses its radial slot in the locked position; and the releasing means includes a radially extending actuating nose on the upper end portion of the locking bolt.

Claim 9

Dependent Claim 28 words

A hoisting shackle system as defined in claim 1, wherein: the releasing means includes means for remotely actuating the reaction of the locking bolt from its locked position.

Claim 10

Dependent Claim 88 words

A hoisting shackle system as defined in claim 8, wherein: the remote actuating means includes a Bowden-type pull cable, a sheath bracket on the shackle body for the abutment and positioning of the near end of the cable sheath, and a cable attachment between the corresponding end of the cable and one end of the locking bolt; the sheath bracket being so positioned in relation to the cable attachment that a pulling action on the Bowden cable causes the locking bolt to be retracted from its locked position.

Claim 11

Dependent Claim 40 words

A hoisting shackle system as defined in claim 9, wherein: the remote-actuating means further includes a return spring surrounding the cable between the sheath bracket and the cable attachment, the return spring urging the locking bolt into its locked position.

Claim 12

Dependent Claim 214 words

A hoisting shackle for releasably attaching a hoisting harness to a load, the shackle comprising: a generally torus-shaped, unitary shackle body having a central annular cavity of circular outline arranged therein; a hook or end link of the hoisting harness being engageable through the center opening of the torus shape; an arcuate locking bolt received in the annular cavity of the shackle body so as to be guided therein for movement along the center circle of the cavity; a radial opening in the shackle body of such width and arcuate length that the locking bolt can be inserted therethrough; a wall reinforcement on that portion of the shackle body which is located diametrally opposite its radial opening, the wall reinforcement occupying a generally segment-shaped portion of the center opening of the torus; and a radial slot in the shackle body in angular alignment with its wall reinforcement the slot having opposing slot flanks which extend substantially perpendicularly to said annular cavity from the periphery of the torus towards said reinforcment, without cutting across the latter; and wherein the locking bolt is movable between a locked position in which a portion thereof extends across said radial slot, serving as a load-carrying member, and a release position in which the bolt is positioned outside said slot.

Claim 13

Dependent Claim 214 words

A hoisting shackle for releasably attaching a hoisting harness to a load, the shackle comprising: a generally torus-shaped, unitary shackle body having a central annular cavity of circular outline arranged therein; a hook or end link of the hoisting harness being engageable through the center opening of the torus shape; an arcuate locking bolt received in the annular cavity of the shackle body so as to be guided therein for movement along the center circle of the cavity; a radial opening in the shackle body of such width and arcuate length that the locking bolt can be inserted therethrough; a wall reinforcement on that portion of the shackle body which is located diametrally opposite its radial opening, the wall reinforcement occupying a generally segment-shaped portion of the center opening of the torus; and a radial slot in the shackle body in angular alignment with its wall reinforcement the slot having opposing slot flanks which extend substantially perpendicularly to said annular cavity from the periphery of the torus towards said reinforcment, without cutting across the latter; and wherein the locking bolt is movable between a locked position in which a portion thereof extends across said radial slot, serving as a load-carrying member, and a release position in which the bolt is positioned outside said slot.

Claim 14

Dependent Claim 61 words

A hoisting shackle as defined in claim 11, wherein the arcuate length of the locking bolt is substantially one-half of the length of the annular cavity of the shackle body; and the radial opening in the shackle body occupies approximately one-half of the torus circumference, the torus cross section in the area of said opening having the shape of a U-channel.

Claim 15

Dependent Claim 24 words

A hoisting shackle as defined in claim 11, further comprising: means for retracting the locking bolt to its release position from a remote location.

Claim 16

Dependent Claim 53 words

A hoisting shackle as defined in claim 13, wherein the retracting means includes a Bowden cable attached by one end to the locking bolt and a sheath bracket on the shackle body positioning one end of the Bowden cable sheath at a distance from where the cable is attached to the locking bolt.

Claim 17

Dependent Claim 41 words

A hoisting shackle as defined in claim 14, wherEin the retracting means further includes a return spring surrounding the Bowden cable end portion between the sheath bracket and the cable attachment, the spring urging the locking bolt into its locked position.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1978-05-12	1978-11-11	1979-05-13	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1982-05-12	1982-11-11	1983-05-13	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1986-05-12	1986-11-11	1987-05-13	$7700.00	Window Closed / Lapsed

Hoisting shackle with quick release attachment means

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