Games using tangible projectile – Golf – Club or club support
Reexamination Certificate
1999-06-07
2001-02-06
Passaniti, Sebastiano (Department: 3711)
Games using tangible projectile
Golf
Club or club support
C473S340000
Reexamination Certificate
active
06183380
ABSTRACT:
BACKGROUND—FIELD OF INVENTION
This invention relates generally to golf clubs and more particularly to a putter head wit a dual face striking surface.
BACKGROUND—DESCRIPTION OF PRIOR ART
The game of golf is generally known and has been around for many generations. It is a game of accuracy, wherein the accuracy is based on the lowest score possible. The score is determined by the number of strokes required to place a golf ball in a cup which resides on a putting green.
There are many factors involved in reducing a golfer's score. One of the biggest factors involved in reducing the score is the use of proper clubs, more particularly the golf putter. A well designed golf putter should include features that promote accuracy, consistency, and forgiveness to minor errors. Perhaps one of the most common errors made by putters is that of forward hand push. By pushing the hands to far ahead of the ball, the slight positive loft either becomes zero or negative. This negative loft induces a compression into the ground at contact creating a harsh feel. From this point the ball tends to bounce, skip, skid, and roll towards it's target. This series of events produces inconsistent putting.
Due to the foregoing problems, it is preferred that a golfer be provided with a putter face design that is immune to the effects of forward hand push.
There are several putter faces described in the prior art that promote consistent ball roll characteristics.
U.S. Pat. No. 3,989,257 utilizes a pair of elliptical curve's across the face in the vertical and horizontal directions to as to resist inconsistency due to wrist pronation. The idea is that as long as the center of the putter head travels along a perfectly straight path the normal projection from the point of contact's tangent will remain unchanged regardless of wrist rotation. This is not practical, however, since a deviation from a perfect path is more likely than a rotation about the wrists. If this were the case, having a deviation from a perfect putter path and thus a contact non-linear with the path of the center of mass, the trajectory of the ball will be far from straight.
U.S. Pat. No. 4,162,074 hopes to increase accuracy by means of producing top spin. The invent ion uses a face with two substantially flat faces angles so that they intersect to form an outwardly horizontal protrusion. This protrusion is designed such that it contacts the ball below its center and drags upward along the surface of the ball as the golfer's stroke follows through. The problem with this idea is that the putter does not remain in contact with the ball long enough to “drag” the ball into a top spin motion. The impact is in fact a very short impulse in which the bail's trajectory is perpendicular to the tangent of the point of impact. Even if the theory worked, however, the stroke inconsistencies of even the most skilled golfer would cause this near microscopic chain of events to fail.
OBJECT OF THE INVENTION
Besides addressing the matters and problems above, the main object of the present invention is to provide a putter head with a dual face striking surface for maximizing the use of the sweet spot of the putter, regardless of the type of stroke used by the user.
REFERENCES:
patent: 3989257 (1976-11-01), Barr
patent: 4077633 (1978-03-01), Studen
patent: 4162074 (1979-07-01), Thomson
patent: 5863262 (1999-01-01), Donofrio
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