Frank W Robinson

US Patent:

39339696, Jan 20, 1976

Filed:

Apr 15, 1974

Appl. No.:

5/460759

Inventors:

Frank R. Robinson - Dallas OR
Frank S. Robinson - Dallas OR

International Classification:

B28B 120

US Classification:

264312

Abstract:

A wire reinforced hollow core concrete fence post is made by injecting concrete into a form in which is centrally supported a longitudinally extending mandrel having a plurality of radially extending spacers extending longitudinally along its surface, the spacers being adapted to support a cylindrical tube of wire mesh reinforcing remote from the surface of the mandrel. A pallet board is disposed in the bottom of the form for supporting the concrete injected therein. Means are provided to rotate the manadrel and the tube of wire mesh reinforcing while the concrete is being injected into the form. Means are also provided to withdraw the mandrel from the form after the concrete has been injected, while retaining the concrete and the reinforcing within the form. After the mandrel has been withdrawn, a pusher is engaged with the end of the mandrel to push the pallet board and the concrete in the shape of the post with the tube of wire mesh reinforcing disposed therein, out of the form and onto a pallet mounted on a movable carriage. Means are provided to move the pallet and the carriage transversely of the form to allow space for receiving a subsequent post.