Dynamic balance-testing method for a golf club shaft

Details Dynamic balance-testing method for a golf club shaft Dynamic balance-testing method for a golf club shaft

2005-11-29

2005-11-29

Chapman, John E. (Department: 2856)

Measuring and testing

Specimen stress or strain, or testing by stress or strain...

By loading of specimen

C473S289000

Reexamination Certificate

active

06968747

ABSTRACT:
A dynamic balance-testing method for a golf club shaft in accordance with the present invention comprises steps of: fixing a first end of a golf club shaft; measuring reacting forces of a constant displacement of a second end of the golf club shaft in a plurality of predetermined angular directions with respect to an axis of the golf club shaft; calculating a minimum difference of reacting force of any two opposite directions; and determining a preferred balance direction according to the minimum difference of reacting force and thus selecting a preferred striking direction perpendicular to the balance direction of the golf club shaft for assembling.

REFERENCES:
patent: 4958834 (1990-09-01), Colbert
patent: 5515717 (1996-05-01), White
patent: 5976028 (1999-11-01), Ciccarello et al.
patent: 6494109 (2002-12-01), Weiss
patent: 6526613 (2003-03-01), Penley

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