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:
Feb. 01, 2005
Filed:
May. 16, 2001
Norman Matheson Lindsay, Amersham, Buckinghamshire HP7 9AH, GB;
Norman Matheson Lindsay, Amersham, Buckinghamshire HP7 9AH, GB;
Other;
Abstract
A golf-putter head () has a grooved impact face () defining lengthwise ridges () for impacting a dimpled golf-ball in areas of contact that are distributed around the dimples for improvement of putt accuracy by collectively centralizing the resultant striking force on the ball. The profile, width w and pitch p of the ridges () are selected according to hardness h and with p and w not exceeding 3.5 mm and (p−0.4) mm respectively, to reduce the standard deviation of dimple-effect error distribution by at least 15% in putting with initial ball-velocity of 2.5 m/s. Ridge-profile is symmetrically rounded (FIGS.), flat (FIG.) or segmented-flat (FIG.), or asymmetrical (FIG.), and test apparatus (FIGS.) uses a linear actuator () for projecting the ball repeatedly to drop onto an impact-recording plate () to reveal scatter due to dimple-effect error.