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:
May. 01, 2007
Filed:
Apr. 18, 2003
Norman Matheson Lindsay, Amersham, Buckinghamshire HP7 9AH, GB;
Norman Matheson Lindsay, Amersham, Buckinghamshire HP7 9AH, GB;
Other;
Abstract
Golf clubs, of putter and wood-type especially, each include an attachment between shaft and club head which is of a compliance to allow the club head to behave more closely as a 'free-body' in providing vertical gear-effect when striking the ball. The compliance is related to freeing the club head for rotation about an axiswhich extends through the center of masswith an orientation perpendicular to the shaft axisin a plane parallel to the shaft axisand containing the heel-toe axisthrough the center of mass. In this regard, the compliance about axisis not less than the force-couple bending compliance of a length of 1000/K, or 3000/K, or more preferably 10000/K, millimeters of the shaft measured from the tip-end. The rotational axisis spaced by less than 0.33K millimeters, or not more than 4,25 or less than 2 millimeters, from the shaft axis. The center of massis located not less than 10 millimeters, and preferably not less than 15 millimeters, behind the impact face, and is not more than 13 millimeters, and preferably not more than 10 millimeters, above the sole of the club. The spacing DD between the shaft-attachmentand the rotational axisis less than 2K millimeters or preferably less than K millimeters.