The Burke Company

Cyril Thomas Eager

Philip A Torbet

A socket cavity formed in a concrete slab of the type poured horizontally and subsequently tilted up, which cavity affords engagement of hoisting equipment to the slab. The inner portion of the cavity is in the form of a frusto-conical wall surface communicating with the surface of the cavity through a cylindrical bore concentric with the frusto-conical surface. The cavity is formed by placing in the slab form an expendable flask-like hollow article formed of synthetic resin or the like which is left in the slab after erection thereof. Engaging apparatus cooperable with the cavity which has on the inner end thereof arms that are pivotally moveable between a retracted position and an extended position, the arms engaging the frusto-conical wall of the cavity when in the extended position. The apparatus includes mechanism at the outer end thereof for effecting retraction or extension of the arms, the mechanism being remotely operable so as to afford disengagement of the hoisting mechanism from the slab from a remote location after erection of the slab.

Concrete slab hoisting apparatus

A hanger for suspending concrete forms from a beam or other support. The hanger is provided with cast ends which have screw threaded openings proximate their upper portions for receipt of a tension rod and non-threaded sockets proximate their lower portions for receipt of a compression strut. The ends are also provided with openings for the receipt of support rods used to suspend forms from the hanger and these openings accommodate the suspension of such support rods at varying angles relative to the ends.

Growing community of inventors

San Francisco, CA, United States of America

Cyril Thomas Eager