The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 24, 2024
Filed:
Sep. 24, 2020
Applicant:
Prgr Co., Ltd., Tokyo, JP;
Inventor:
Hiroshi Saegusa, Tokyo, JP;
Assignee:
PRGR Co., Ltd., Kanagawa, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N 3/303 (2006.01); G01M 5/00 (2006.01);
U.S. Cl.
CPC ...
G01N 3/303 (2013.01); G01M 5/005 (2013.01);
Abstract
A stiffness characteristic measurement device holds a golf club head with a face surface facing upward, drops a collision rod vertically toward the face surface, and calculates the stiffness characteristic of the golf club head based on a detection value of an accelerometer attached to the collision rod. Every time the measurement point on the face surface is changed, a drop distance changing step of adjusting the drop distance of the collision rod is performed so that the collision velocity of the collision rod to the measurement point is substantially constant.