A - Human Necessities – 63 – B
Patent
A - Human Necessities
63
B
A63B 53/00 (2006.01)
Patent
CA 2116717
Over the last twenty years numerous developments occurred in the domain of golf equipment. Of the main changes, the most important is the development and the commercial production of the metal and graphite clubheads as alternatives to conventional wood driver and fairway woods. The objectives in replacing wood by stainless steel, steel and graphite were to further control the positioning of the center of gravity in the clubhead. At that time, the objective was to improve the ball velocity and direction, the clubhead's construction has to be such that the center of gravity has to be the closest possible to the hitting point or better known as the sweet spot. Weight factor of the club is critical and has to be respected within grams. The other main factor, mateial's distribution on the club head should be such to respond to the rigidity requirements mostly at the club face peripheries. These two factors tend to be opposite when they are separately maximized in the clubhead's construction. Stainless steel, steel clubheads' construction are made of two separately cast hollow shells welded with foam injected in the center hollow construction, as stiffning and vibration resistant material. The weight factor together with the rigidity factor are the main detriment factors for stainless steel and steel clubheads; the hitting surface - sweet spots is made of thin wall and tend to shatter under the golf ball impact, thus affecting the ball's direction. Recently, new approaches have been taken to resolve this problem in casting a steel insert for the hitting part of the club or installing a graphite hitting surface insert in the front end of the club. Results are known to be mixed and are only partially exploiting the laws of physics that apply in the movement of hitting a golf ball. The present invention of metal matrix composites golf clubheads is based on the light weight of aluminium composites compared to stainless steel and steel (ratio 1:3), the strength, stiffness, vibration and wear resistance of aluminium metal matrix composites. Using aluminium metal matrix composites allows such modifications to the interior design and construction of the golf clubhead giving a better control over the positioning of the center of gravity at the front end of the clubhead: hitting zone or sweet spot, an increase of the front wall thickness to avoid any shattering of the club face upon impact and a better distribution of the mass at the peripheries to obtain a better dynamic behaviour in the clubhead, thus leaving a lesser hollow interior surface for vibration at an equivalent weight to the stainless steel, steel or graphite clubheads. Increase thickness of the hitting surface, larger sweet spot, a reduced hollow surface maximize the use of the laws of physics that apply to the motion of hitting a golf ball.
Cinq-Mars Pierre
Godlewski Richard
Goss Aleksander
Cinq-Mars Pierre
Godlewski Richard
Goss Aleksander
LandOfFree
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