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US 4,288,075 AGranted
Ultra light weight golf club shaft
AssigneeBrunswick Corporation
InventorsEugene Kaugars, George A. Ossola
Life of this patent
Estimating the term…
Abstract
An ultra light weight golf club shaft tapered in a step pattern having a reinforced wall at the region where maximum bending moment occurs during play.
Claims6
A light weight, hollow metal, golf club shaft tapered with a step pattern, having approximately the same deflection feel as conventional weight golf club shafts having the same stiffness characteristics, having a grip section including a grip portion at one end and weighing not more than about 2.9 ounces.
- said shaft exclusive of the grip portion having a thin, substantially uniform, wall thickness,
- said shaft consisting of a metal having a yield strength after heat treatment of at least about 235000 lbs./in.sup.2 and an ultimate strength of at least 265000 lbs./in..sup.2,
- said shaft being subject to a maximum bending moment in the grip section during play,
- the said grip section comprising a portion having a wall thickness greater than the wall thickness of the rest of the shaft in order to resist said bending moment,
- said portion of greater wall thickness comprising at least a part of the grip section, and wherein the entire grip section has the same outside diameter.
2 more elements
Dependencies are inferred from the claim text.