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US 6,454,662 B1Granted
Golf club shaft having multiple conical sections
AssigneeHarrison Sports, Inc.
InventorMichael H. L. Cheng
Life of this patent
Estimating the term…
Abstract
A golf club shaft having a stiffness control section between the grip section and the main body section. The stiffness control section includes a first tapered portion and a second tapered portion. The circumference of the first tapered portion increases from the proximal end to the distal end thereof and the circumference of the second tapered portion decreases from the proximal end to the distal end thereof.
Claims37
A golf club shaft, comprising:
- a tip section defining a length, a distal end, a proximal end and a longitudinal axis;
- a grip section defining a length, a distal end, a proximal end, a longitudinal axis, a distal portion outer surface slope and a distal end circumference;
- a main body section extending from the proximal end of the tip section and defining a length, a longitudinal axis, a proximal end, a proximal portion outer surface slope and a proximal end circumference that is greater than the distal end circumference of the grip section;
- and
- a stiffness control section, between the proximal end of the main body section and the distal end of the grip section, defining a length, a longitudinal axis and at least one of a substantially constant and a slightly tapered wall thickness, the stiffness control section including at least
- a first tapered portion defining a distal end, a proximal end, a circumference and an outer surface slope different than the distal portion outer surface slope of the grip section, and
- a second tapered portion defining a distal end, a proximal end, a circumference, and an outer surface slope different than the outer surface slope of the first tapered portion and the outer surface slope of the main body section proximal portion, the second tapered portion abutting the first tapered portion to define an intersection and the second tapered portion being located between the main body section and the first tapered portion,
- the circumference of the intersection of the first and second tapered portions being greater than the circumference of the distal end of the grip section;
- wherein the sum of the tip section length, grip section length, main body section length and stiffness control section length defines a shaft length, and the stiffness control section length is between about 2% and about 12% of the shaft length.
6 more elements
A golf club shaft, comprising:
- a tip section defining a distal end, a proximal end and a longitudinal axis;
- a grip section defining a distal end, a proximal end, a longitudinal axis, a distal portion outer surface slope and a distal end circumference;
- a main body section extending from the proximal end of the tip section and defining a longitudinal axis, a proximal end, a proximal portion outer surface slope and a proximal end circumference that is greater than the distal end circumference of the grip section;
- and
- a stiffness control section, between the proximal end of the main body section and the distal end of the grip section, defining a longitudinal axis and at least one of a substantially constant and a slightly tapered wall thickness, the stiffness control section including at least
- a first tapered portion defining a distal end, a proximal end, a circumference that increases from the proximal end to the distal end thereof and an outer surface slope different than the distal portion outer surface slope of the grip section, and
- a second tapered portion defining a distal end, a proximal end, a circumference that decreases from the proximal end to the distal end thereof, and an outer surface slope different than the outer surface slope of the first tapered portion and the outer surface slope of the main body section proximal portion, the second tapered portion abutting the first tapered portion to define an intersection and the second tapered portion being located between the main body section and the first tapered portion,
- the circumference of the intersection of the first and second tapered portions being greater than the circumference of the distal end of the grip section.
5 more elements
A golf club shaft, comprising:
- a tip section defining a distal end, a proximal end and a longitudinal axis;
- a grip section defining a distal end, a proximal end, a longitudinal axis, a distal portion outer surface slope and a distal end circumference;
- a main body section extending from the proximal end of the tip section and defining a longitudinal axis, a proximal end, a proximal portion outer surface slope and a proximal end circumference that is greater than the distal end circumference of the grip section;
- and
- a stiffness control section, between the proximal end of the main body section and the distal end of the grip section, defining a longitudinal axis and at least one of a substantially constant and a slightly tapered wall thickness, the stiffness control section including at least
- a first tapered portion defining a distal end, a proximal end, a circumference and an outer surface slope different than the distal portion outer surface slope of the grip section, and
- a second tapered portion defining a distal end, a proximal end, a circumference, and an outer surface slope different than the outer surface slope of the first tapered portion and the outer surface slope of the main body section proximal portion, the second tapered portion abutting the first tapered portion to define an intersection and the second tapered portion being located between the main body section and the first tapered portion,
- the circumference of the intersection of the first and second tapered portions being greater than the circumference of the distal end of the grip section and the circumference of the distal end of the first tapered portion being greater than the circumference of the distal end of the second tapered portion.
5 more elements
A golf club shaft, comprising:
- a tip section defining a distal end, a proximal end and a longitudinal axis;
- a grip section defining a distal end, a proximal end, a longitudinal axis and a distal portion outer surface slope;
- a main body section extending from the proximal end of the tip section and defining a longitudinal axis and a proximal portion outer surface slope;
- and
- a stiffness control section, between the proximal end of the main body section and the distal end of the grip section, defining a longitudinal axis and at least one of a substantially constant and a slightly tapered wall thickness, the stiffness control section including at least
- a first tapered portion defining a distal end, a proximal end, a circumference and an outer surface slope different than the distal portion outer surface slope of the grip section,
- a second tapered portion defining a distal end, a proximal end, a circumference, and an outer surface slope different than the outer surface slope of the first tapered portion, the second tapered portion abutting the first tapered portion to define an intersection, and
- a third tapered portion defining a distal end, a proximal end and a circumference,
- the second tapered portion being between the first and third tapered portions, the circumference of the intersection of the first and second tapered portions being greater than the circumference of the distal end of the grip section, the circumference of the first tapered portion increasing from the proximal end to the distal end thereof, the circumference of the second tapered portion decreasing from the proximal end to the distal end thereof, and the circumference of the third tapered portion increasing from the proximal end to the distal end thereof.
6 more elements
A golf club shaft, comprising:
- a tip section defining a distal end, a proximal end and a longitudinal axis;
- a grip section defining a distal end, a proximal end, a longitudinal axis and a distal portion outer surface slope;
- a main body section extending from the proximal end of the tip section and defining a longitudinal axis and a proximal portion outer surface slope, the main body section including a first portion defining a distal end, a proximal end and a circumference and a second portion defining a distal end, a proximal end and a circumference, the circumference of the first portion being substantially constant from the proximal end to the distal end thereof and the circumference of the second portion decreasing from the proximal end to the distal end thereof;
- and
- a stiffness control section, between the proximal end of the main body section and the distal end of the grip section, defining a longitudinal axis and at least one of a substantially constant and a slightly tapered wall thickness, the stiffness control section including at least
- a first tapered portion defining a distal end, a proximal end, a circumference and an outer surface slope different than the distal portion outer surface slope of the grip section, and
- a second tapered portion defining a distal end, a proximal end, a circumference, and an outer surface slope different than the outer surface slope of the first tapered portion, the second tapered portion abutting the first tapered portion to define an intersection,
- the circumference of the intersection of the first and second tapered portions being greater than the circumference of the distal end of the grip section.
5 more elements
Dependencies are inferred from the claim text.