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US 6,663,517 B2Granted
Rigid shell layered softball bat with elastomer layer
AssigneeJas. D. Easton, Inc.
InventorsJohn Buiatti, Dewey Chauvin, Gary W. Filice
Life of this patent
Estimating the term…
Abstract
A thin wall tubular bat, particularly for softball, has a constant barrel diameter and an internal tubular insert spaced from the barrel with a shear stress transmitting elastomeric layer sandwiched between the barrel and insert so that the insert reinforces the barrel to reduce denting which would otherwise occur as the elastomer efficiently transfers stress to the insert and stores and releases energy during impact of the bat with a ball.
Claims20
A ball bat comprising:
- an outer shell including a barrel, a handle, and a tapered section joining the handle to the barrel;
- a substantially cylindrical insert radially spaced from an inner surface of the barrel;
- and
- a substantially cylindrical elastomeric layer located between and in force transmitting relationship with the outer shell and the insert, the elastomeric having a thickness of 0.050 to 0.060 inches and a coefficient of restitution of at least 40%.
1 more element
A ball bat comprising:
- an outer shell including a barrel, a handle, and a tapered section joining the handle to the barrel;
- a substantially cylindrical insert radially spaced from an inner surface of the barrel;
- and
- a substantially cylindrical elastomeric layer located between and in force transmitting relationship with the outer shell and the insert, the elastomeric layer adhesively bonded to an outer surface of the insert and to the inner surface of the barrel, wherein the elastomeric layer has a thickness in the range of 0.050 to 0.060 inches, and the barrel has a thickness in the range of 70% to 100% of a thickness of the elastomeric layer.
1 more element
A ball bat comprising:
- a metallic outer shell including a barrel, a handle, and a tapered section joining the handle to the barrel, the barrel having a thickness in the range of 0.036 to 0.055 inches;
- a substantially cylindrical insert radially spaced from an inner surface of the barrel, wherein the thickness of the barrel is in the range of 55% to 85% of a thickness of the insert;
- and
- a substantially cylindrical elastomeric layer located between and in force transmitting relationship with the outer shell and the insert.
1 more element
Dependencies are inferred from the claim text.