Title:
ゴルフクラブシャフトを測定および調整する方法および装置
Document Type and Number:
Japanese Patent JP5681736
Kind Code:
B2
Abstract:
The preferred orientation, or planar oscillation plane, of a golf club shaft is located by measuring the oscillation of the shaft when an impulse is applied. A reaction mass is mounted on one end of the golf club shaft and is attracted with an electromagnet, and the electromagnet is deactivated in order to initiate vibratory motion. Preferably, the out-of-plane oscillation is measured at a large number of angular positions about the shaft axis, and the principal planar oscillation plane is identified by that pair of opposed angular positions in which the out-of-plane oscillation is smallest. The location of the preferred orientation may be marked on the shaft and used to assemble a golf club with the planar oscillation plane in a predetermined orientation. The straightness of the shaft can also be determined by deriving its spring constant from its oscillation frequency and then measuring the restoring force when the shaft is deflected by the same nominal amount at different angular positions; differences in restoring force can be attributed to differences in actual deflection distance resulting from lack of straightness.
Inventors:
リチャード エム． ウェイス
ジョセフ エイチ． バトラー
マイケル ジェイ． ツウィッグ
フランクリン エス． バウウェル
ラリー アール． パルマー
ジョセフ エイチ． バトラー
マイケル ジェイ． ツウィッグ
フランクリン エス． バウウェル
ラリー アール． パルマー
Application Number:
JP2013024417A
Publication Date:
March 11, 2015
Filing Date:
February 12, 2013
Export Citation:
Assignee:
ウェイス， リチャード エム．
International Classes:
A63B53/00; A63B59/00; G01H1/00; G01H13/00; A63B53/10
Attorney, Agent or Firm:
Takayuki Hirose