Golf driver with variable weighting for changing center of gravity

• US 5,013,041 A
• Filed: 01/22/1990
• Issued: 05/07/1991
• Est. Priority Date: 01/22/1990
• Status: Expired due to Fees

• Current Assignee: Cipa Manufacturing Corporation
• Original Assignee: Cipa Manufacturing Corporation
• Inventors: Sun, Donald J. C., Tai, Wen J.
• Primary Examiner(s): Coven, Edward M.
• Assistant Examiner(s): Passaniti, Sebastiano
• Application Number:
  US07/468,087
• Time in Patent Office: 470 Days
• Field of Search: 273/167-175, 273/77 A, 273/77 R, 273/164, 273/80 A
• US Class Current: 473/252
• CPC Class Codes: A63B 2053/0491 with added weights, e.g. changeable, replaceable
• CPC Class Codes: A63B 53/04 Heads
• CPC Class Codes: A63B 53/0437 with special crown configurations
• CPC Class Codes: A63B 53/0441 with visual indicators for aligning the golf club
• CPC Class Codes: A63B 53/0454 Strengthening ribs on the rear surface of the impact face plate
• CPC Class Codes: A63B 53/0458 with non-uniform thickness of the impact face plate
• CPC Class Codes: A63B 53/0466 wood-type
• CPC Class Codes: A63B 60/00 Details or accessories of golf clubs, bats, rackets or the like

Abstract

A golf club head has a pair of parallel longitudinal chambers running thereacross behind the face plate. A set of weight members having various weights is provided. Such weight members are selectively installed in the chambers to vary the center of gravity of the club head both horizontally and vertically to modify the driving action of the club as may be desired.

Claims

1. In a golf club head having a sole plate and a face plate having front and rear surfaces extending upwardly substantially normally from said sole plate, said sole plate having opposing bottom and top surfaces, the improvement comprising:

first and second similarly dimensional chambers formed along the rear surface of said face plate, said chambers running substantially the entire horizontal extent of said face plate in side by side substantially parallel relationship to each other,

a plurality of sets of weight members, all of said weight members having the same dimensions which enable a plurality of said weight members to be fitted into said chambers, the weight members of each set being of a different density material, one end of each of said chambers being permanently closed, and

removable cap means for removably capping the other ends of said chambers to retain the weights therein,

said weight members being selectively installable in said chambers to variably shift the location to the center of gravity for said club head, both vertically and horizontally, said weight members being removable for replacement by means of said removable cap means.

2. The golf club head of claim 1 wherein said weights are cylindrical in shape, said chambers having cylindrical inner surfaces with a diameter substantially equal to the outside diameter of said weights.

3. The club head of claim 1 wherein there a three weights in each set thereof.

4. The club head of claim 1 wherein there are three sets of said weights, the weights of one of said sets being made of aluminum, the weights of another of said sets being made of brass and the weights of the third of said sets being made of lead.

5. The club head of claim 1 and further including a plurality of sighting arrows formed on the top surface of said sole plate, said arrows running towards the rear surface of said face plate in a direction substantially normal thereto.