Table balanced, adjustable moment of inertia, vibrationally tuned putter

• US 5,439,222 A
• Filed: 08/16/1994
• Issued: 08/08/1995
• Est. Priority Date: 08/16/1994
• Status: Expired due to Fees

• Current Assignee: Christian F. Kranenberg
• Original Assignee: Christian F. Kranenberg
• Inventors: Kranenberg, Christian F.
• Primary Examiner(s): Millin, Vincent
• Assistant Examiner(s): Pierce, William M.
• Application Number:
  US08/291,189
• Time in Patent Office: 357 Days
• Field of Search: 273/167 R, 273/169, 273/171, 273/167 D, 273/167 F, 273/80 C, 273/80.2
• US Class Current: 473/309
• CPC Class Codes: A63B 53/0487 for putters A63B53/065 takes precedence
• CPC Class Codes: A63B 60/54 with means for damping vibrations

Abstract

An improved golf putter is disclosed in which a heel and toe weighted putter head, hosel, and shaft are configured such that the putter'"'"'s mass is equally bisected by a vertical plane intersecting the heel and toe regions of the putter head and having the longitudinal axis of the shaft lie in that plane. This configuration provides a table balanced feature to the golf putter. Deterministically positioned weights of varying masses in the heel and toe regions produce expected changes in the moment of inertia of the putter head without changing the balanced feature of the putter. Many hosel positions and shaft lie angles can be obtained without defeating the table balanced feature. Vibrational tuning of the putter head is achieved by preloading of the deterministically positioned weights.

Claims

1. A golf putter head in combination with a shaft having a grip to form a golf putter, the elements of the golf putter comprising:

(a) an elongated front striking face and elongated rear face defining substantially flat surfaces extending from a heel to a toe, a sole surface being convexly curved from said heel to said toe extending rearwardly from a lower front edge and defining the bottom surface of said golf putter head, an elongated top edge surface extending between said front striking face and said rear face, said shaft having an axial line;

(b) a fixed lengthed toe weight chamber near said toe and a fixed lengthed heel weight chamber near said heel located behind said front striking face, a fixed lengthed toe weight, a fixed lengthed heel weight, a toe weight plug receptacle, a heel weight plug receptacle, a toe weight plug, and a heel weight plug;

(c) a lower hosel stem affixed to said top edge surface extending substantially upward, a hosel offset affixed to said lower hosel stem extending substantially horizontal and rearward, an upper hosel stem affixed to said hosel offset extending substantially upward, and a hosel barrel affixed to said upper hosel stem for affixing said shaft;

(d) a center of mass plane defined as a vertical plane intersecting said toe and said heel elongatedly bisecting said golf putter head into equal amounts of mass on each side of said center of mass plane;

(e) said hosel offset being so positioned such that said axial line of said shaft, longitudinal centerline of said hosel socket, and longitudinal centerline of said upper hosel lie in said center of mass plane;

(f) a table balanced golf putter defined by positioning said golf putter such that said axial line of said shaft is constrained horizontally and unconstrained rotationally resulting in said putter head coming to rest with said center of mass plane parallel to a vertical plane;

(g) a means of securing said toe weight plug and said heel weight plug in said toe weight receptacle and said heel weight receptacle respectfully, for immobilizing said toe weight received by said toe weight chamber, and immobilizing said heel weight received by said heel weight chamber thereby changing the moment of inertia of said putter head in an expected manner;

(h) said toe weight chamber and said heel weight chamber so positioned such that upon receiving said toe weight and said heel weight respectively, said toe weight and said heel weight are bisected by said center of mass plane into equal amounts of mass of said toe weight and said heel weight on cad side of said center of mass plane to maintain the table balanced feature of said golf putter.

2. The golf putter of claim 1, wherein said golf putter head is formed of a metallic material.

3. The golf putter of claim 1, wherein said toe weight, said heel weight, said toe weight chamber, and said heel weight chamber are of cylindrical form such that said center of mass plane is perpendicular to axial lines of said toe weight, said heel weight, said toe weight chamber, and said heel weight chamber.

4. The golf putter of claim 1, further including a weighting means comprising of said toe weight and said heel weight comprised of metallic materials different from metallic material of remaining elements of said golf putter head thereby providing a wide moment of inertia and weighting range.

5. An improved golf putter comprised of the following elements:

a front striking face, a rear face, a top edge surface, a sole surface extending rearwardly, a toe, a heel, a hosel section for affixing a shaft having a grip and an axial line in a well known manner, the improvement comprising;

(a) a plurality of weight chambers located behind said front striking lace, a corresponding plurality of weights, a corresponding plurality of weight plug receptacles, and a corresponding plurality of weight plugs;

(b) a lower hosel stem affixed to said top edge surface extending substantially upward, a hosel offset affixed to said lower hosel stem extending substantially horizontal and rearward, an upper hosel stem affixed to said hosel offset extending substantially upward, and a hosel barrel affixed to said upper hosel stem for affixing said shaft;

(c) a center of mass plane defined as a vertical plane intersecting said toe and said heel elongatedly bisecting said golf putter head into equal amounts of mass on each side of said center of mass plane;

(d) said hosel offset being so positioned such that said axial line of said shaft, longitudinal centerline of said hosel socket, and longitudinal centerline of said upper hosel lie in said center of mass plane;

(e) a table balanced golf putter defined by positioning said golf putter such that said axial line of said shaft is constrained horizontally and unconstrained rotationally resulting in said putter head coming to rest with said center of mass plane parallel to a vertical plane;

(f) a means of securing said weight plugs in said weight receptacles for immobilizing said weights received by said weight chambers thereby changing the moment of inertia of said putter head in an expected manner;

(g) said weight chambers so positioned such that upon receiving said weights, said weights are bisected by said center of mass plane into equal amounts of mass of said weights on each side of said center of mass plane to maintain the table balanced feature of said golf putter;

(h) a means of securing said weight plugs in said weight receptacles for compressing said weights received by said weight chambers to a desired level thereby preloading said weights in a manner deterministically changing the vibrational characteristic of said golf putter head.

6. The golf putter head of claim 5, wherein said golf putter head is formed of metallic material.

7. The golf putter head of claim 5, wherein said weights and said weight chambers are of cylindrical form such that axial lines of said weights and said weight chambers are perpendicular to said rear face.

8. The golf putter head of claim 5, further including said weights comprised of metallic materials different from metallic material of remaining elements of said putter head producing a wide range of vibrational characteristics.

9. The golf putter head of claim 5, wherein said golf putter head is comprised of a pair of said weights, a pair of said weight chambers, a pair of said weight plug receptacles, and a pair of said weight plugs, one of the said weights, one of the said weight chambers, one of the said weight plug receptacles and one of the said weight plugs located behind said front striking face near said toe of said golf putter head, and one of the said weights, one of the said weight chambers, one of the said weight plug receptacles, and one of the said weight plugs located behind said front stalking face near said heel of said golf putter head.