Methods and apparatus for the manufacturing of prestressed reinforced concrete railroad ties and the like
OwnerDavid P. Ollendick, Robert W. Ollendickinventors
Life of this patent
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Abstract
Methods and apparatus for the manufacturing of prestressed reinforced concrete railroad ties and the like in which the apparatus consists of an elongated spine or compression member which has no foundation but rather is independent of the supporting surface upon which it rests. In one version of the apparatus two bridge members confront the opposite ends of the spine and permanent tension resisting members pass beneath the spine from end to end of the spine and are attached to the lower ends of the bridge members. In another version two structural members are embedded in the concrete of the spine and protrude to provide terminal members.
Claims18
Apparatus for use in the manufacturing of prestressed reinforced concrete railroad ties, comprising:
- an elongated spine;
- first and second terminal means respectively located adjacent the opposite ends of said spine;
- a plurality of anchoring means each of which is adapted to be attached to one end of a reinforcing wire which passes through railroad tie molding means borne by said spine;
- first and second collocating means for maintaining a first set of said anchoring means attached to said first terminal means in a predetermined array, and for maintaining a second set of said anchoring means attached to said second terminal means in a predetermine array;
- said spine being capable of maintaining said first and second terminal means at a fixed distance from each other during the curing of concrete deposited in said railroad tie molding means.
The method of manufacturing prestressed reinforced concrete railroad ties comprising the steps of:
- fabricating an elongated spine resting upon a supporting surface and unattached to said supporting surface;
- locating terminal means at the ends of said spine;
- attaching reinforcing wire anchoring means to said terminal means;
- emplacing railroad tie molding means upon said spine;
- passing reinforcing wires through said molding means;
- and
- attaching said reinforcing wires to said anchoring means.
Dependencies are inferred from the claim text.