Golf club head

• US 3,995,865 A
• Filed: 02/11/1976
• Issued: 12/07/1976
• Est. Priority Date: 07/20/1973
• Status: Expired due to Term

• Current Assignee: Acushnet Company (FILA Holdings Corp.)
• Original Assignee: Acushnet Company (FILA Holdings Corp.)
• Inventors: Jepson, John W., Lynch, Francis deS., Woolley, Edward R., Cochran, Alastair J.
• Primary Examiner(s): Apley, Richard J.
• Application Number:
  US05/657,028
• Time in Patent Office: 300 Days
• Field of Search: 273/77 R, 273/77 A, 273/167-175
• US Class Current: 473/337
• CPC Class Codes: A63B 53/005 Club sets
• CPC Class Codes: A63B 53/04 Heads
• CPC Class Codes: A63B 53/045 Strengthening ribs
• 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 53/0462 characterised by tapering thickness of the impact face plate
• CPC Class Codes: A63B 53/047 iron-type
• CPC Class Codes: A63B 60/00 Details or accessories of golf clubs, bats, rackets or the like

Abstract

A golf club head having a high radius of gyration while maintaining desirable conventional design features is disclosed. The golf club head comprises a steel head and preferably tungsten embedded inserts being added in the heel and toe areas thereof.

Claims

1. A golf club iron comprising a shaft and a steel club head having heel and toe portions, weighting means for said club head, said weighting means including added weight of density not less than 16 grams per cubic centimeter inserted into the back of the steel club head at least at the toe area of the club head, and said weighting means further including at least one indentation in the back of the club head between the heel and toe portions, the mass and position of the added weight and the size and position of the indentation being sufficient in combination to provide the club head with a radius of gyration of at least about 1.05 inches measured about an axis which passes through the centroid of the club head and is parallel to the axis of the shaft of the club.

2. A golf club iron comprising a shaft and a steel club head having heel and toe portions, weighting means for said club head, said weighting means including added weight of density not less than 16 grams per cubic centimeter inserted into the back of the steel club head at least at the toe area of the club head, and said weighting means further including at least one indentation in the back of the club head between the heel and toe portions, the mass and position of the added weight and the size and position of the indentation being sufficient in combination to provide the club head with a radius of gyration of at least about 1.05 inches measured about an axis which passes through the centroid of the club head and is parallel to the axis of the shaft of the club and wherein said weighting means further comprises weight of density not less than 16 grams per cubic centimeter added in the back of the heel area of the club head.

3. A golf club iron comprising a shaft and a steel club head having heel and toe portions, weighting means for said club head, said weighting means including added weight of density not less than 16 grams per cubic centimeter inserted into the back of the steel club head at least at the toe area of the club head, and said weighting means further including at least one indentation in the back of the club head between the heel and toe portions, the mass and position of the added weight and the size and position of the indentation being sufficient in combination to provide the club head with a radius of gyration of at least about 1.05 inches measured about an axis which passes through the centroid of the club head and is parallel to the axis of the shaft of the club and wherein said weighting means further comprises weight of density not less than 16 grams per cubic centimeter added in the back of the heel area of the club head and wherein the weight added to the toe area is at least three times as great as the weight added to the heel area.

4. A golf club iron comprising a shaft and a steel club head having heel and toe portions, weighting means for said club head, said weighting means including added weight of density not less than 16 grams per cubic centimeter inserted into the back of the steel club head at least at the toe area of the club head, a scored area on the face of the club head, and said weighting means further including at least one indentation in the back of the club head, at least a portion of which is behind at least a portion of the scored area of the club face, the mass and position of the toe weight and the size and position of the indentation being sufficient in combination to provide the club head with a radius of gyration of at least about 1.05 inches about an axis which passes through the centroid of the club head and is parallel to the axis of the shaft.

5. A golf club iron comprising a shaft and a steel club head having heel and toe portions, weighting means for said club head, said weighting means including added weight of density not less than 16 grams per cubic centimeter inserted into the back of the steel club head at least at the toe area of the club head, a scored area on the face of the club head, and said weighting means further including at least one indentation in the back of the club head, at least a portion of which is behind at least a portion of the scored area of the club face, the mass and position of the toe weight and the size and position of the indentation being sufficient in combination to provide the club head with a radius of gyration of at least about 1.05 inches about an axis which passes through the centroid of the club head and is parallel to the axis of the shaft and wherein said weighting means further comprises weight of density not less than 16 grams per cubic centimeter added in the back of the heel area of the club head.

6. A golf club iron comprising a shaft and a steel club head having heel and toe portions, weighting means for said club head, said weighting means including added weight of density not less than 16 grams per cubic centimeter inserted into the back of the steel club head at least at the toe area of the club head, a scored area on the face of the club head, and said weighting means further including at least one indentation in the back of the club head, at least a portion of which is behind at least a portion of the scored area of the club face, the mass and position of the toe weight and the size and position of the indentation being sufficient in combination to provide the club head with a radius of gyration of at least about 1.05 inches about an axis which passes through the centroid of the club head and is parallel to the axis of the shaft and wherein the indentation is throughout a substantial portion of the back of the club head behind the scored area on the club head face.

7. A golf club iron comprising a shaft and a steel club head having heel and toe portions, weighting means for said club head, said weighting means including added weight of density not less than 16 grams per cubic centimeter inserted into the back of the steel club head at least at the toe area of the club head, a scored area on the face of the club head, and said weighting means further including at least one indentation in the back of the club head, at least a portion of which is behind at least a portion of the scored area of the club face, the mass and position of the toe weight and the size and position of the indentation being sufficient in combination to provide the club head with a radius of gyration of at least about 1.05 inches about an axis which passes through the centroid of the club head and is parallel to the axis of the shaft and wherein the indentation is throughout a substantial portion of the back of the club head behind the scored area on the club head face and wherein there is at least one supporting rib across the indented area.

8. A golf club iron comprising a shaft and a steel club head having heel and toe portions, weighting means for said club head, said weighting means including added weight of density not less than 16 grams per cubic centimeter inserted into the back of the steel club head at least at the toe area of the club head, a scored area on the face of the club head, and said weighting means further including at least one indentation in the back of the club head, at least a portion of which is behind at least a portion of the scored area of the club face, the mass and position of the toe weight and the size and position of the indentation being sufficient in combination to provide the club head with a radius of gyration of at least about 1.05 inches about an axis which passes through the centroid of the club head and is parallel to the axis of the shaft and wherein the indentation is throughout a substantial portion of the back of the club head behind the scored area on the club head face and wherein there is at least one supporting rib across the indented area and wherein there is one rib and in which the center line of the rib essentially bisects the angle formed by the intersection of the line extending along the top of the back of the club head and the bottom of the back of the indentation.

9. A golf club iron comprising a shaft and a steel club head having heel and toe portions, weighting means for said club head, said weighting means including added weight of density not less than 16 grams per cubic centimeter inserted into the back of the steel club head at least at the toe area of the club head, a scored area on the face of the club head, and said weighting means further including at least one indentation in the back of the club head, at least a portion of which is behind at least a portion of the scored area of the club face, the mass and position of the toe weight and the size and position of the indentation being sufficient in combination to provide the club head with a radius of gyration of at least about 1.05 inches about an axis which passes through the centroid of the club head and is parallel to the axis of the shaft and wherein the indentation is throughout a substantial portion of the back of the club head behind the scored area on the club head face and wherein there is at least one supporting rib across the indented area and wherein there is one rib and in which the center line of the rib essentially bisects the angle formed by the intersection of the line extending along the top of the back of the club head and the bottom of the back of the indentation and wherein there is one weight in the heel area and one weight in the toe area, each of which is essentially circular and each of which has its center located along a continuation of the center line of the rib.