US 4,173,856 AGranted

Anchor for the tilt-up and transport of prefabricated building components

OwnerSiegfried Frickerinventor

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Abstract

Anchor element for the tilt-up and transport of prefabricated building components, particularly prefabricated wall panels, in cooperation with a hoisting shackle of the type having a torus-shaped body and a retractable arcuate locking bolt engaging a bolt hole in the exposed end portion of the anchor element, the latter defining a bridge portion between its bolt hole and its outer extremity and, as part of the bridge portion, one or two integral longitudinal extensions of the anchor element which reach beyond the bridge portion and have two oppositely oriented force-transmitting surfaces one of which engages a surface of the hoisting shackle body during tilt-up, thereby preventing pivoting of the shackle body against the concrete recess which surrounds the exposed portion of the anchor element. The anchor element with two laterally spaced integral extensions engages the sides of the shackle body, and the anchor element with a central integral extension engages an aperture in the shackle body.

Claims20

Dependent claims

An anchor element adapted for use with a hoisting shackle of the type having a shackle body and a locking bolt which is engageable across an attachment opening of the shackle body, for the tilt-up and transport of heavy building components, such as prefabricated concrete wall members, supporting columns, and the like, which, in the course of manufacture, transportation, and installation, may have to be reoriented from a horizontal to a vertical orientation, or vice versa, the anchor element being intended to be permanently embedded in the building component, in such a way that an end portion thereof is exposed within a recess, for attachment of the hoisting shackle, the anchor element comprising:

an elongated element body of which said exposed end portion constitutes a first length portion, with a thickness which matches the width of said shackle body attachment opening, the element body having an adjoining second length portion which serves as an anchoring portion and which includes, for that purpose, means for rigidly retaining the element in the building component, when embedded therein;
a transverse hole in said exposed length portion extending through the thickness of the element body, the hole being of a size to allow insertion of said locking bolt therethrough and arranged at such a distance from the extremity of the exposed length portion that a bridge portion is formed between the hole and the exposed extremity;
and
said bridge portion includes at least one longitudinal extension of the anchor element body defining at least one force-transmitting surface thereon which is oriented to abut against a cooperating surface portion of the body of the hoisting shackle, when the latter is attached to the anchor element, thereby preventing the hoisting shackle from pivoting about the pivot axis defined by said transverse hole in the exposed anchor portion and the engaged locking bolt, into contact with the wall surrounding said recess, when the shackle is pulled in a direction which creates such a pivoting tendency.

1 more element

An attachment mechanism adapted for the tilt-up and transport of heavy building components, such as prefabricated concrete wall members, supporting columns, and the like, which, in the course of manufacture, transportation, and installation, may have to be reoriented from a horizontal to a vertical orientation, or vice versa, the attachment mechanism comprising in combination:

a hoisting shackle having an outwardly generally ring-shaped body with a central opening engageable by a hoisting harness in the manner of a chain link, the body enclosing an arcuate cavity interrupted in its midportion by a radially oriented attachment slot which has a bottom in its radially inner end formed by a connecting bridge of the shackle body;
the shackle further including a matching arcuate locking bolt which is guided inside said arcuate cavity for movements between a locked position in which it extends across the attachment slot, and an open position in which it is retracted behind the attachment slot;
and
an anchor element intended to be permanently attached to the building component through partial embedding therein, the anchor element having an elongated element body of which one length portion is an exposed length portion and the remaining length portion is to serve as an embedded length portion and includes, for that purpose, means for rigidly retaining the anchor element in the building component, when embedded therein;
and wherein
the exposed portion of the anchor element body forms an eye portion fitting into the attachment slot of the shackle body the eye portion having a transverse hole arranged to be engaged by the locking bolt of the shackle;
and
the eye portion of the anchor element body further includes at least one integral extension which is oriented towards the connecting bridge of the shackle body, the latter and said extension or extensions, respectively, forming at least one pair of cooperating force-transmitting surfaces which restrict the pivoting freedom of the attached hoisting shackle about the pivot axis defined by the transverse hole of the eye portion and the engaged locking bolt, when the shackle is pulled in a direction which creates such a pivoting tendency.

5 more elements

Dependencies are inferred from the claim text.