Golf shaft for controlling passive vibrations

Details Golf shaft for controlling passive vibrations Golf shaft for controlling passive vibrations

1999-07-06

2000-12-05

Chapman, Jeanette

Games using tangible projectile

Golf

Club or club support

473521, A63B 5310

Patent

active

061559326

ABSTRACT:
In the field of golf equipment, a new shaft design incorporates passive damping to suppress the vibrations excited in the shaft before and after impact. The design comprises a viscoelastic material sandwiched between multiple layers of composite plies which induce large shear strains in the viscoelastic when the shaft is subjected to bending, extension, or twist, thus increasing damping losses over conventional golf shafts. In one embodiment, the sandwiching layers are of opposing orientation. In another embodiment, the layers are oriented in an opposing V-shape laminate.

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patent: 5427373 (1995-06-01), Kusumoto
patent: 5599242 (1997-02-01), Solviche
Olcott et al, "Improved Vibration Damping in Composite Structures Using "Zig-Zag" Fibers and Embedded Viscoelastic Damping Layers", 38.sup.th International SAMPE Symposium, pp. 1357-1370, May 1993.
"Proceedings of Damping'91", Wright Laboratory, vol. III, Aug. 1991.

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