Composite riser
AssigneeSpenco
InventorsAlbert A. Andrews, Spencer Land
Life of this patent
Estimating the term…
Abstract
A composite riser for an archery bow formed from fibers embedded in resin in such a way that resin rich areas, dry fibers and voids are eliminated, providing consistent risers of high quality. The location of structural fibers, such as a carbon fibers or fiberglass composite materials, is ensured within a mold used to form the riser and relative to the resin which bonds the fibers together. Various processes may be used to form the riser with control of the fibers and resin maintained. For example, structural reaction injection molding, liquid composite molding, continuous fiber molding, modified compression molding, resin transfer molding and variable infusion molding processes can be used.
Claims21
A method of making a composite riser for an archery bow, comprising the steps of:
- a) orienting fibers in a desired manner to ensure proper arrangement of the fibers in the riser;
- b) providing a three dimensional form having an interior cavity, and arranging and enclosing the oriented fibers in the interior cavity of the three-dimensional form;
- c) placing the form with the fibers arranged therein into a mold;
- d) providing a resin into the mold on the fibers and between adjacent fibers;
- e) maintaining the orientation of the fibers in the form and the mold even after the mold is closed;
- f) molding the resin and fibers under pressure;
- and
- g) curing the resin to form the composite riser.
A method of forming a composite riser for an archery bow, comprising the steps of:
- a) orienting unidirectional fiber strands into at least one bundle of fiber strands;
- b) providing a three dimensional form having an interior cavity, and placing said at least one bundle of fiber strands into the cavity of the form to provide a desired location and orientation of the at least one bundle of fiber strands;
- c) placing the form containing the at least one bundle of fiber strands into a mold;
- d) closing the mold;
- e) injecting a resin into the mold under pressure to combine the resin with the fiber strands;
- f) maintaining the pressure within the mold for a sufficient time to ensure proper combination of the resin and fiber strands;
- and
- g) curing the resin to form the composite riser.
Dependencies are inferred from the claim text.