Games using tangible projectile – Golf – Club or club support
Utility Patent
1999-02-09
2001-01-02
Passaniti, Sebastiano (Department: 3711)
Games using tangible projectile
Golf
Club or club support
C473S349000
Utility Patent
active
06168537
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a golf club head which is preferably applicable to a wood or metal wood type golf club, etc.
2. Description of the Related Art
Conventionally, a “low centroid golf club”, in which a centroid of a golf club head is positioned at a relatively lower place of the golf club head, has been known. In such a conventional low centroid golf club, a large proportion of the weight of the golf club is provided at the sole side of the golf club so that a loft at the time of impact (i.e., dynamic loft) is increased, whereby the ball hit by the golf club readily rises higher.
However, in the conventional low centroid golf club head, the low centroid is realized by providing a large amount of a metal having a large specific gravity, such as tungsten, copper, etc., at the sole side of the golf club, so that manufacturing cost is unfavorably increased.
SUMMARY OF THE INVENTION
It is therefore an object of the present invention to provide a golf club head which can increase the distance of the ball hit by the golf club head and reduce the cost for manufacturing the golf club head.
In order to achieve the above object, a first aspect of the present invention provides a golf club head including: a face portion; a back face portion; and a crown portion having a protruded portion in which a maximum point of a curved contour of a central cross section of the crown portion is positioned in the rear of the center of the golf club head.
A second aspect of the present invention provides a golf club head having a constitution according to the first aspect of the invention, wherein a volume of a back-face-side portion of the golf club head, which is positioned in the rear of the center of the golf club head, is greater than a volume of a face-portion-side portion of the golf club head, which is positioned in front of the center of the golf club head.
A third aspect of the present invention provides a golf club head having a constitution according to the first aspect of the present invention, wherein the crown portion has a cut-away portion obtained by obliquely cutting off the rear peripheral portion thereof.
A fourth aspect of the present invention provides a golf club head having a constitution according to the first aspect of the present invention, wherein, on a curved contour of a central cross section of the crown portion, a relationship AB<CD is established where AB denotes a height between the leading edge B of the front portion and the top edge A of the face portion, and CD denotes a height between an upper edge C of the cutaway portion and the intersecting point D at which the perpendicular drawn from the upper edge C intersects the back face portion.
A fifth aspect of the present invention provides a golf club head having a constitution according to the first aspect of the present invention, wherein the crown portion takes a stream line shape including a gentle tilt formed between the face portion and the maximum point and a steep tilt formed at a portion beyond the maximum point.
A sixth aspect of the present invention provides a golf club head having a constitution according to the first aspect of the present invention, wherein the face portion has a shallow face surface.
A seventh aspect of the present invention provides a golf club head having a constitution according to the first aspect of the present invention, wherein the face surface of the face portion is made of a material having a high coefficient of rebound (hereinafter, material having a high coefficient of rebound will often referred to as “highly rebounding material”).
An eighth aspect of the present invention provides a golf club head having a constitution according to a first aspect of the present invention, wherein a metallic material is press fitted at a portion positioned in the rear of the center of the golf club head.
REFERENCES:
patent: 4900029 (1990-02-01), Sinclair
patent: 5193810 (1993-03-01), Antonious
patent: 5271620 (1993-12-01), Moriguchi
patent: 5465970 (1995-11-01), Adams et al.
patent: 5505448 (1996-04-01), Park
patent: 5944620 (1999-08-01), Elmer
Golf Planning Co., Ltd.
Passaniti Sebastiano
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