Fiberglass vaulting pole
AssigneeAMF Incorporated
InventorHerbert R. Jenks
Life of this patent
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Abstract
The vaulting pole has at least three layers, two of the layers comprising fiberglass tape helically wound along the pole into a succession of butt-jointed turns with the fibers thereof extending primarily lengthwise of the tape but the turns of the two layers being crossed with respect to each other, and the third layer comprising a plurality of turns of fiberglass cloth sandwiched between the two tape layers, the fibers of the cloth extending primarily lengthwise of the pole.
Claims3
An elongated and hollow vaulting pole having at least three layers of fiberglass which are bonded together, two of said layers comprising fiberglass tape extending the length of said pole in a succession of butt-jointed helical turns, said tape having the fibers thereof oriented primarily lengthwise of said tape, the turns of one of said two layers being oriented crosswise of the turns of the other of said two layers, and the third of said three layers being positioned between said two layers and comprising a plurality of turns of fiberglass cloth extending the length of said pole, said cloth having the fibers thereof oriented primarily lengthwise of said pole.
A method of manufacturing a vaulting pole, comprising helically winding epoxy resin impregnated fiberglass tape having the fibers thereof oriented primarily lengthwise of said tape into a succession of butt-jointed turns on an elongated mandrel, then wrapping a rectangular shaped piece of epoxy impregnated fiberglass cloth having the fibers thereof oriented primarily lengthwise of said mandrel over said tape for a plurality of turns, then repeating said tape winding step over said cloth, but in an opposite sense to orientate the turns thereof crosswise with respect to the turns of the first tape winding step, then repeating said cloth wrapping step but with an isosceles trapezoidal shaped piece, and then curing said epoxy resin and bonding all said fiberglass tape and cloth together into a unitary rigid structure by applying heat and external pressure to said resin impregnated fiberglass.
Dependencies are inferred from the claim text.