Golf club having damping treatments for improved impact acoustics and ball speed
First Claim
1. A golf club head comprising:
- a striking face; and
a viscoelastic polymer in contact with a rear surface of the striking face,wherein the viscoelastic polymer has a tangent of delta peak temperature between −
70 degrees Celsius and −
20 degrees Celsius at 1 Hz, and a tangent of delta peak temperature between 20 degrees Celsius and 50 degrees Celsius at 6 kHz.
4 Assignments
0 Petitions
Accused Products
Abstract
A golf club head having a damping treatment, such as a viscoelastic polymer, is disclosed. The viscoelastic polymer may be in contact with the rear surface of a striking face of the golf club head. The viscoelastic polymer may have a tangent of delta peak temperature between −70 degrees Celsius and −20 degrees Celsius at a 1 Hz frequency. An elastic modulus (E), in megapascals (MPa), of the viscoelastic polymer has a relationship to a striking face thickness (t), in millimeters (mm), defined by Ê≤−14{circumflex over (t)}+305. The elastic modulus (E), in megapascals (MPa), of the viscoelastic polymer has a relationship to an effective stiffness (S) of the striking face, in gigapascals per meter (GPa/m), defined by Ê≤−1.16Ŝ+258.33. The viscoelastic polymer may cover a portion of the rear surface of the striking face or may substantially fill a cavity of the golf club head.
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Citations
19 Claims
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1. A golf club head comprising:
-
a striking face; and a viscoelastic polymer in contact with a rear surface of the striking face, wherein the viscoelastic polymer has a tangent of delta peak temperature between −
70 degrees Celsius and −
20 degrees Celsius at 1 Hz, and a tangent of delta peak temperature between 20 degrees Celsius and 50 degrees Celsius at 6 kHz. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A golf club head comprising:
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a striking face having a thickness (t); and a viscoelastic polymer, having an elastic modulus (E), in contact with a rear surface of the striking face, wherein the viscoelastic polymer has a tangent of delta peak temperature between 20 degrees Celsius and 50 degrees Celsius at 6 kHz; wherein the elastic modulus (E), in megapascals (MPa), of the viscoelastic polymer has a relationship to the striking face thickness (t), in millimeters (mm), defined by Ê
≤
−
14{circumflex over (t)}+305, wherein Ê
is a unitless value equal to E/1 MPa and {circumflex over (t)} is a unitless value equal to t/1 mm, and wherein the thickness (t) is one of an average thickness of the striking face and a maximum thickness of the striking face. - View Dependent Claims (14, 15, 16, 17)
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18. A golf club head comprising:
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a striking face having an effective stiffness (S); and a viscoelastic polymer, having an elastic modulus (E), in contact with a rear surface of the striking face, wherein the viscoelastic polymer has a tangent of delta peak temperature between 20 degrees Celsius and 50 degrees Celsius at 6 kHz; wherein the elastic modulus (E), in megapascals (MPa), of the viscoelastic polymer has a relationship to the effective stiffness (S) of the striking face, in gigapascals per meter (GPa/m), defined by Ê
<
−
1.16Ŝ
+258.33, wherein Ê
is a unitless value equal to E/1 MPa and Ŝ
is a unitless value equal to S/1 GPa/m, and wherein the effective stiffness S is defined as - View Dependent Claims (19)
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Specification