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Putter

  • US 4,927,144 A
  • Filed: 08/07/1989
  • Issued: 05/22/1990
  • Est. Priority Date: 08/07/1989
  • Status: Expired due to Fees
First Claim
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1. The improvement in a golf putter having an elongated shaft with a grip at its upper end and having a club head with a heel end, a toe end, a sole, an upper surface, and a face comprising:

  • (a) said club head having a downwardly open cavity elongated in a heel-to-toe direction and having a plate closing said cavity at said sole of said club head and secured to said club head,(b) said club head having a generally vertically extending top opening to said cavity in said heel end of said club head and said plate having a generally vertically extending through opening in said toe end thereof,(c) said shaft having an extension at its lower end below the main portion of said shaft including a first portion bent to pass downwardly through said top opening, having a second portion slanting downwardly in said cavity toward said toe end, and having a third portion extending downwardly into said through opening in said plate where it is welded to said plate,(d) said shaft at its location passing through said top opening being smaller in cross-section than said top opening whereby when a golf ball is struck by said face said first portion of said shaft has room in said top opening to flex relative to said club head whereby said head gives upon initial impact with said golf ball and then recoils against said golf ball,(e) said club head having a center of gravity located at the intersection of the longitudinal axis of said second portion of said shaft and of a diagonal line bisecting the angle formed by a line from said grip to said through opening and by the centerline of said main portion of said shaft, said extension including a first reduced diameter portion above and adjacent to said top opening of said club head and said third portion of said extension being equally reduced in diameter and said reduced diameter portions being substantially equally spaced from said center of gravity whereby torquing of said shaft upon impact with a golf ball is equally shared by said reduced diameter portions, and(f) half the weight of said club head being disposed above and half the weight of said club head being disposed below an oblique plane that extends through said longitudinal axis of said second portion of said shaft extension, said oblique plane forming straight horizontal lines in vertical planes at right angles to said longitudinal axis of said second portion of said shaft extension, whereby during generally horizontal travel of said club head during a stroke, said club head does not tend to rotate about said longitudinal axis of said second portion of said shaft extension.

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