Metal working – Method of mechanical manufacture – Assembling or joining
Patent
1979-11-01
1981-08-11
Moon, Charlie T.
Metal working
Method of mechanical manufacture
Assembling or joining
29423, 29526R, 264269, 264234, 273 73C, 273 73H, 273 73J, B21D 3500
Patent
active
042826420
ABSTRACT:
A racquet for use in racquet sports is disclosed. In the preferred and illustrated embodiment, a composite racquet construction is set forth which utilizes an extruded metal frame which accepts multilayered, laminated, fiber reinforced, resin material typically including an epoxy base with graphite or fiberglass therein. The extruded section receives the laminate material prior to curing wherein the metal extruded section serves as a mold. After curing, the composite frame has improved properties over the metal extrusion, alone, and enhances frame strength, rigidity and flexure characteristics. The extruded frame incorporates a central webbing which is subsequently drilled with holes for stringing the racquet.
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patent: 4031601 (1977-06-01), Staub
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