Tie rod with expansible cone seal members

Claim 1

A tie rod and cone assembly for use in temporarily positioning a pair of spaced-apart wall forms, the tie rod and cone assembly comprising a rod in the form of a generally elongated member defining an axis each end of which is adapted to project through a respective bore in the spaced-apart wall forms and a cone member of circular configuration positioned on each end of the rod and adapted to be positioned at least partially within a respective bore and normally in concentric spaced relation with a respective bore and defining a first outer diameter, said cone members being of a deformable material so as to be adapted to be radially deformed to a second diameter greater than said first diameter and into sealing engagement with the interior of a respective bore and retainer means for holding the cone members in sealing engagement with a respective bore whereby leakage from the forms is prevented, each cone member being a generally elongated member having oppositely directed frustoconical end portions, and a generally cylindrical center portion intermediate said frustoconical end portions wherein the frustoconical end portion directed toward the rod end and the center portion are symmetric and coaxial to the rod axis and wherein said frustoconical end portion directed away from the rod end is asymmetric with respect to the rod axis and has a maximum diameter which is greater than the diameter of the center portion thereby defining a lip adapted for contacting the inner wall of the form so as to provide a spreader function.