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US 5,076,583 AGranted
Racket frame with circular cross section and variable thickness
AssigneeSportstech Industries (U.S. Tech) Inc.
InventorHenry Hsu
Life of this patent
Estimating the term…
Abstract
A game racket (11) having improved aerodynamics and hitting response is disclosed. With the exception of the handle (13) the entire racket is comprised of elements all having a substantially circular cross section. The head (17) of the racket (11) is comprised of three sections. Each section may have a different cross sectional diameter.
Claims15
A racket frame comprising:
- an elongated handle portion;
- a throat portion comprised of a left and a right segment each of substantially circular cross section, said segments having first ends extending longitudinally and laterally and outwardly from a first end of said handle;
- a bridge portion having a substantially circular cross section, said bridge portion extending transversely to the length of the handle and intersecting the left and right segments of said throat opposite the handle;
- and
- an arcuate head portion cooperating with the bridge portion to form a closed curvilinear shape, the head portion comprised of a lower section adjacent the bridge portion, a middle section next adjacent the lower section, and a crown section opposite the bridge portion, said lower, middle, and crown sections having substantially circular cross sections, wherein each of said throat portion, said lower section, said middle section, and said crown section has a stiffness level and at least two of said stiffness levels differ.
2 more elements
A racket frame comprising:
- an elongated handle portion;
- a throat portion comprised of a left and a right segment each of substantially circular cross section, said segments having first ends extending longitudinally and laterally and outwardly from a first end of said handle;
- a bridge portion having a substantially circular cross section, said bridge portion extending transversely to the length of the handle and intersecting the left and right segments of said throat opposite the handle;
- and
- an arcuate head portion cooperating with the bridge portion to form a closed curvilinear shape, the head portion comprised of a lower section adjacent the bridge portion, a middle section next adjacent the lower section, and a crown section opposite the bridge portion, said lower, middle, and crown sections having substantially circular cross sections, wherein said lower section has a first cross section diameter, said middle section has a second cross section diameter, and said crown section has a third cross section diameter, and wherein said first and third cross section diameters are greater than said second cross section diameter.
2 more elements
A racket frame comprising:
- an elongated handle portion;
- a throat portion comprised of a left and a right segment each of substantially circular cross section, said segments having first ends extending longitudinally and laterally and outwardly from a first end of said handle;
- a bridge portion having a substantially circular cross section, said bridge portion extending transversely to the length of the handle and intersecting the left and right segments of said throat opposite the handle;
- and
- an arcuate head portion cooperating with the bridge portion to form a closed curvilinear shape, the head portion comprised of a lower section adjacent the bridge portion, a middle section next adjacent the lower section, and a crown section opposite the bridge portion, said lower, middle, and crown sections having substantially circular cross sections, wherein said lower section has a first cross section diameter, said middle section has a second cross section diameter, and said crown section has a third cross section diameter, and wherein said third cross section diameter is greater than said second cross section diameter, said second cross section diameter is greater than said first cross section diameter, and said first cross section diameter is greater than the cross section diameter of said bridge portion.
2 more elements
A racket frame comprising:
- an elongated handle portion;
- a throat portion comprised of a left and a right segment each of substantially circular cross section, said segments having first ends extending longitudinally and laterally and outwardly from a first end of said handle;
- a bridge portion having a substantially circular cross section, said bridge portion extending transversely to the length of the handle and intersecting the left and right segments of said throat opposite the handle;
- and
- an arcuate head portion cooperating with the bridge portion to form a closed curvilinear shape, the head portion comprised of a lower section adjacent the bridge portion, a middle section next adjacent the lower section, and a crown section opposite the bridge portion, said lower, middle, and crown sections having substantially circular cross sections, wherein each of said throat portion, said lower section, said middle section, and said crown section has a diameter and at least two of said diameters differ.
2 more elements
Dependencies are inferred from the claim text.