Tie rod securing means for a concrete wall form

Claim 1

Securing means for the opposed sides of a concrete wall form and comprising an elongated narrow flat tie rod of uniform width and having breakbacks adapted to lie inwardly from the inside faces of the form sides and dividing the tie rod into a medial section for fixed embedment in the hardened concrete, and end sections adapted to project outwardly through holes which are provided in the form sides, a rigid open-ended tubular torquetransmitting sleeve cone slidably and telescopically receivable over each end section and when fully received thereon extending outwards from the adjacent breakback, the wall of said tubular sleeve cone being substantially of uniform radial thickness throughout its entire length and the inner end region of such sleeve cone being tapered so as to present a frustoconical inner end region of small slant angle, each tapered inner end region being formed with a pair of diametrically disposed longitudinally extending spline grooves which are coextensive with the length of the associated inner end region and the bottom walls of which, in effect, constitute extensions of the inside cylindrical surface of the wall of said sleeve cone, said spline grooves serving to receive therein the opposite longitudinal edges of the tie rod, each tie rod end section being formed with a slot therein for reception of a wedge bolt which engages an exterior surface of the adjacent form side, and means on the outer end of each sleeve cone for facilitating the application of torque to the sleeve cone, said diametrically disposed spline grooves, in combination with the adjacent longitudinal edges of the tie rod, serving to establish a driving connection between the sleeve cone and the adjacent end section when torque is applied to said sleeve cone in order to effect severance of said end section from the medial section of the tie rod.