Composite racquet with double tube head frame
AssigneeEF Composite Technologies, L.P.
InventorRafael FILIPPINI
Life of this patent
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Abstract
A sports racquet frame is built of a composite of laminations of fibrous material as impregnated by a thermosetting resin. The head section of the frame has an upper tube preferably disposed above the string bed plane and a lower tube preferably disposed below the string bed plane. A solid bridge of material integrally joins the upper tube to the lower tube. In a preferred embodiment the bridge is disposed radially exteriorly of the center line of the tubes, to maximize the length of string segments, which are strung to the bridge.
Claims14
A sports racquet, comprising:
- a frame formed of a composite of plural laminations of fibrous material impregnated with a polymer;
- the frame having an elongate head portion formed around and defining a string bed, the head section including a first tube which is elongate in the direction of elongation of the head portion, a second tube which is elongate in the direction of elongation of the head portion and disposed generally in parallel to the first tube, and a single bridge, elongate in the direction of elongation of the head portion, joining and spacing the first tube with and from the second tube, the bridge having no cavity which is elongate in said direction of elongation of the head portion.
A sports racquet, comprising:
- a frame head portion defining and supporting a string bed, the string bed having a center and substantially disposed in a string bed plane;
- the frame head portion being comprised of an endless wall of composite material, the composite material formed of a plurality of laminations of fibrous material as impregnated with a polymer, the endless wall having an outer portion relatively remote from the center of the string bed and an inner portion relatively near to the center of the string bed;
- and
- the endless wall forming an upper tube, a lower tube and a single bridge joining the upper tube to the lower tube, the bridge spacing the upper tube from the lower tube in a depth direction orthogonal to the string bed plane, the outer portion of the endless wall being joined to the inner portion of the endless wall along the depth direction of the bridge.
A sports racquet, comprising:
- a frame having a head portion defining and surrounding a strung area, the frame formed of a composite including plural laminations of fibrous material as impregnated with a polymer, a periphery of the head portion defining a theoretical maximum area across which unconstrained strings can be strung, an actual area across which unconstrained strings are strung being more than 91% of said theoretical maximum area.
Dependencies are inferred from the claim text.