Arrow Shaft for Bowfishing Having Carbon Fiber Core
First Claim
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1. A bowfishing arrow shaft comprising:
- a cylindrical shaft body extending along a shaft axis having a central portion of carbon fibers embedded in a matrix material and generally aligned with the shaft axis and surrounded by a tubular sheath of fibers that are not carbon fibers embedded in the matrix material.
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Abstract
A pultruded arrow shaft for bow fishing in which a carbon fiber is placed in a core and then surrounded by fiberglass composite and provides comparable stiffness benefits to the arrow shaft as to that provided by outer wrappings or spines of carbon fiber yet with improved resistance to damage from the outer protective fiberglass fibers.
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Citations
17 Claims
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1. A bowfishing arrow shaft comprising:
a cylindrical shaft body extending along a shaft axis having a central portion of carbon fibers embedded in a matrix material and generally aligned with the shaft axis and surrounded by a tubular sheath of fibers that are not carbon fibers embedded in the matrix material. - View Dependent Claims (5, 7, 8, 9)
- 2. The bowfishing arrow shaft of claim I wherein the matrix material is a thermosetting polymer resin.
- 4. The bowfishing arrow shaft of claim I further including a nock having a bifurcated rearward portion providing opposed fingers for fitting a bowstring therebetween wherein the cylindrical shaft body has a rear end receiving an interfitting end of the nock,
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10. A method of manufacturing a bowfishing arrow shaft wherein the arrow tip comprises a cylindrical shaft body extending along a shaft axis having a central portion of carbon fibers embedded in a first matrix material and generally aligned with the shaft axis and surrounded by a tubular sheath of fibers that are not carbon fibers embedded in a second matrix material, the method comprising the steps of
drawing a plurality of fiberglass fibers and carbon fibers through a resin bath of matrix material; -
passing the matrix impregnated fiberglass fibers along an axis through an outer positioned guide defining an outer sheath concentric about the axis; passing the matrix impregnated carbon fibers through an inner positioned guide defining an inner sheath coaxially within the outer sheath; pressing the matrix impregnated fiberglass fibers and matrix impregnated carbon fibers into a rod shape; and heating the matrix material to solidify the matrix material. - View Dependent Claims (11, 13, 14)
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12. The method of claim II wherein the inner positioned guide includes a plurality of holes arranged in a center ring concentric with the outer ring.
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15. A bow fishing arrow assembly comprising:
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a solid arrow shaft extending along an axis and having a front end and a rear end; a nock having a bifurcated rearward portion providing opposed fingers for fitting a bowstring therebetween and having a forward portion adapted to interfit with the rear end of the arrow shaft to align the nock with the arrow axis; and an arrow tip having a pointed forward portion and a rearward portion adapted to interfit with the front end of the shaft body to align the arrow tip with the arrow axis; wherein the arrow shaft has a central portion of carbon fibers embedded in a first matrix material and generally aligned with the shaft axis and surrounded by a tubular sheath of fibers that are not carbon fibers embedded in a second matrix material. - View Dependent Claims (16, 17)
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Specification