Measuring and testing – Specimen stress or strain – or testing by stress or strain... – By loading of specimen
Patent
1986-07-30
1987-07-28
Levy, Stewart J.
Measuring and testing
Specimen stress or strain, or testing by stress or strain...
By loading of specimen
73794, G01N 320, G01N 300
Patent
active
046825045
ABSTRACT:
A device for measuring a stiffness of a golf-club shaft comprises a clamp for holding one end of a golf-club shaft so that the golf-club shaft extends in a substantially horizontal position. A pointer member having a tip end and a root portion is detachably attached at the root portion thereof to the other end of the golf-club shaft held by the clamp so that the pointer member extends in a substantially horizontal position perpendicular to a longitudinal axis of the golf-club shaft. A counterweight is detachably attached to the tip end of the pointer member and applies a predetermined flexure and torsion load to the golf-club shaft through the pointer member. A vertical displacement measuring instrument is provided to measure the amount of vertical displacement of the tip end of the pointer member produced by torsion and flexure of the golf-club shaft when the predetermined load of the counterweight is applied to the golf-club shaft through the pointer member.
REFERENCES:
patent: 2351574 (1944-06-01), Siversten
patent: 4319750 (1982-03-01), Roy
patent: 4431187 (1984-02-01), Rumble et al.
patent: 4517843 (1985-05-01), Leger
patent: 4558863 (1985-12-01), Haas et al.
patent: 4591157 (1986-05-01), Parente et al.
Levy Stewart J.
Maruman Golf Co. Ltd.
Raevis Robert R.
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