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US 2008/0188321 A1Published application
Golf putter heads and methods of making them
OwnerJohn J. Feigheryinventor
Life of this patent
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Abstract
Golf putter heads have a one-piece heat treated high hardness stainless steel body having an upstanding wall with a striking face, and directly behind it, a downwardly disposed thin unbounded through-cavity to provide distinct repeatable audible feedback. The putter heads can have a centrally located rearwardly extending mass of body material in the form of an integral spherical mound to provide balance and a high moment of inertia. Methods of making the putter heads are disclosed.
Claims20
A golf putter head for attachment to a golf club shaft, comprising:
- a one piece body that is made of a stainless steel material that has a hardness of from about 44 to about 52 on the Rockwell C-Scale, the body including
- a front and a rear,
- a front-to-rear longitudinal axis and a transverse axis,
- a heel and a toe oppositely disposed on a transverse axis, at least one of the heel and toe having structure for attachment to a golf club shaft, and,
- an upstanding wall whose length extends transverse to the longitudinal axis and whose width extends along a longitudinal axis, the upstanding wall having a top surface, and a bottom surface, a front portion and a rear portion, the front portion of the upstanding wall extending generally between the heel and toe and being comprised of
- a contact wall having a front striking face and a rear wall surface, and
- a downwardly disposed unbounded through-cavity, the through-cavity being directly behind the striking face, transverse to the longitudinal axis and extending from and through the top and bottom surfaces of the upstanding wall, the through-cavity having a front wall surface that forms the rear wall surface of the contact wall.
4 more elements
A method of making a one-piece golf putter head of one material, which comprises:
- providing a solid bar of heat treatable stainless steel alloy that is to be formed into the putter head;
- converting the solid bar to nearly the desired final form of the putter head, except for the formation of a through-cavity and a textured striking face, the nearly desired final putter form including a preliminary front striking surface that is to become the textured striking face;
- heat treating the converted nearly desired final putter form to increase its metal hardness to a Rockwell hardness tempered to from about 44 to about 52 on the Rockwell C-Scale;
- forming a shaped through-cavity directly behind the preliminary front surface;
- and
- forming the preliminary front surface into a textured striking face, by machining into the preliminary front surface a series of uniform precision dimples and uniform lands between the dimples.
3 more elements
Dependencies are inferred from the claim text.