Games using tangible projectile – Golf – Club or club support
Patent
1994-11-03
1997-02-11
Passaniti, Sebastiano
Games using tangible projectile
Golf
Club or club support
473325, 473340, 473345, A63B 5304
Patent
active
056015003
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
This invention relates to golf clubs, particularly golf putters and more particularly the head of a golf putter.
BACKGROUND OF THE INVENTION
Golf club heads have a front face which is used to contact the ball to be hit, and thus to exchange energy from the club to the ball. For woods and driving irons the front face is at a positive angle to drive the ball upwards, as well as forwards, when hit. The angles vary from club to club allowing the player to select the desired amount of lift for a particular shot. Putters, for use close to the hole, generally have little or no angle as they are intended to push the ball across the playing surface without any lift. Some players slightly pull their putter upwards as its strikes the ball so as to produce top spin and encourage more run on or distance for the same force.
DISCLOSURE OF THE INVENTION
The present invention provides a putter that has a negative angle on the front face. The front face will normally hit the ball above centre and therefore may produce top spin on the ball without a need to develop a particular putting style. Thus, when hitting the ball with the putter in accordance with this invention, the ball tends to be pushed and rolled, not merely pushed along the playing surface.
Accordingly, a first aspect the present invention consists in a golf club head comprising a body having a central plane, an attachment means for attaching a shaft parallel to the central plane, and a front face for striking a golf ball, the front face being at a negative angle to the central plane so that a bottom edge of the front face is closer to the central plane than is a top edge of the front face and wherein the centre of gravity of the head is substantially aligned with a point of the front face which is the point of impact of a golf ball.
In one form the club head has two opposed front faces, both at equal negative angles so that the body is in the form of a narrow wedge, the narrowest end of the wedge facing vertically downward as it strikes the ball.
In a second aspect, this invention further consists in a golf club head having an attachment means for attaching a shaft thereto and a front face for striking a golf ball characterised in that within the head is disposed a cavity which is dimensioned such that the front face is defined by a relatively thin wall.
In another form, the club head comprises a body having a central plane, an attachment means for attaching a shaft parallel to the central plane, a front face for striking a golf ball, the front face being at a negative angle to the central plane so that a bottom edge of the front face is closer to the central plane than is a top edge of the front face and a fully enclosed chamber disposed within the head, which chamber is dimensioned such that the front face is defined by a relatively thin wall and wherein the centre of gravity of the head is substantially aligned with a point on the front face which is the point of impact of a golf ball.
It is preferred that the negative angle is in the range 4.degree.-8.degree. it is most preferred that it is in the range 5.degree.-7.degree..
The advantage of the chamber is that it provides a means by which the walls of the front face may be made relatively thin, of the order of 3-5 mm. This thin wall allows a player to achieve a softer sense of contact with the ball. It also extends the "sweet spot".
Of the putters that are currently available with thin walled striking faces, most incorporated a "weighted" sole usually at the back and the lowest point of the club head. This tends to put the club head off-balance with a hook or slice tendency built-in.
However, the club head of the present invention has a shape which is uniform with the bulk of the weight at the top of the blade. Furthermore, the centre of gravity is substantially in the centre and is aligned with a point on the front face which is the point of impact of a golf ball.
Thus the club head of the present invention is perfectly balanced with no hook or slice tendency.
By way of exampl
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The Physics of Ball Games, C. B. Daish, 1972, page 9.
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