Golf putter head assembly and method of use

A head assembly for a golf putter, comprising:

• a hosel having a body portion and a finger extension extending from said body portion, said body portion being provided with a concavity defined in major part by a cylindrical concave surface having an axis and a first radius of curvature, said finger extension having a bore for receiving an end of a putter shaft;
• a head piece including an elongate body having a putting face on one side and a cylindrical convex surface on an opposite side, said cylindrical convex surface having a second radius of curvature approximately equal to and smaller than said first radius of curvature so that said cylindrical convex surface is engageable with said cylindrical concave surface, said cylindrical convex surface being inserted into said concavity so that said cylindrical convex surface is in contact with said cylindrical concave surface, said head piece being provided at opposite ends of said elongate body with two arms extending in parallel relationship to one another in a direction opposite said putting face, said head piece and said putting face having a width extending from an top side to a bottom side of said head piece, said arms having at free ends thereof opposite said elongate body a height extending between an upper side and a lower side of said arms, said height being at least substantially equal to said width;
• and
• a releasable clamping element operatively engageable with said hosel and said head piece to adjustably fix said hosel and said head piece to one another,
• each of said arms including a plate extending in a plane perpendicular to said axis and further including an arcuate end portion with a cylindrical outer or convex surface facing away from said head piece.

A method for assembling a golf putter, comprising:

• providing a hosel having a body portion and a finger extension extending from said body portion, said body portion being provided with a concavity defined in major part by a cylindrical concave surface having an axis and a first radius of curvature, said finger extension having a bore for receiving an end of a putter shaft, said body portion being formed with a slot extending in a plane oriented perpendicularly to said axis;
• providing a head piece including an elongate body having a putting face on one side and a cylindrical convex surface on an opposite side, said cylindrical convex surface having a second radius of curvature approximately equal to and smaller than said first radius of curvature, said head piece being provided with at least one internally threaded recess or hole with a respective opening located in said cylindrical convex surface;
• inserting said head piece partially into said concavity so that said cylindrical convex surface engages said cylindrical concave surface and is substantially coaxial therewith;
• operatively connecting a releasable clamping element to said hosel and said head piece to adjustably fix said hosel and said head piece to one another, the connecting of said clamping element to said hosel and said head piece including inserting an externally threaded bolt through said slot and into said at least one recess or hole;
• and
• removing said bolt from said at least one internally threaded recess or hole, rotating said head piece relative to said hosel about said axis, repositioning said bolt relative to said slot and thereafter threading said bolt into said at least one recess or hole.

A golf putter head assembly kit comprising:

• a putter shaft having an externally threaded distal end;
• a right-handed hosel and a left-handed hosel each having a body portion and a finger extension extending from said body portion, said body portion being provided with a recess or concavity defined in major part by a cylindrical concave surface having an axis and a first radius of curvature, said body portion being further formed with a slot extending in a plane oriented perpendicularly to said axis, said finger extension having an internally threaded bore for receiving said externally threaded distal end of said putter shaft;
• a head piece including an elongate body having a putting face on one side and a cylindrical convex surface on an opposite side, said cylindrical convex surface having a second radius of curvature approximately equal to and smaller than said first radius of curvature so that said cylindrical convex surface is engageable with said cylindrical concave surface of any selected one of said right-handed hosel and said left-handed hosel, said head piece being provided with a plurality of internally threaded holes with respective openings in said cylindrical convex surface, said holes being disposed at respective locations spaced from one another in a direction parallel to said axis, said head piece being provided with a plurality of bores;
• an externally threaded bolt threadable alternatively into different ones of said holes;
• weighting elements of different weight values insertable into said bores;
• and
• a washer element.