IRON HEAD

• US 20110159984A1
• Filed: 03/09/2011
• Published: 06/30/2011
• Est. Priority Date: 07/22/2009
• Status: Abandoned Application

• Current Assignee: Hideo Shimazaki
• Original Assignee: Hideo Shimazaki
• Inventors: SHIMAZAKI, Hideo
• Application Number:
  US13/043,867
• Publication Number:
  US 20110159984A1
• Time in Patent Office: Days
• US Class Current: 473/331
• CPC Class Codes: A63B 2053/0491 with added weights, e.g. changeable, replaceable
• CPC Class Codes: A63B 2209/00 Characteristics of used materials
• CPC Class Codes: A63B 53/04 Heads
• CPC Class Codes: A63B 53/0408 characterised by specific dimensions, e.g. thickness
• CPC Class Codes: A63B 53/0433 with special sole configurations
• CPC Class Codes: A63B 53/047 iron-type
• CPC Class Codes: A63B 53/0475 with one or more enclosed cavities
• CPC Class Codes: A63B 60/02 Ballast means for adjusting the centre of mass A63B60/24, A63B60/54 take precedence
• CPC Class Codes: A63B 60/54 with means for damping vibrations

Abstract

An iron head is provided with a recess portion provided in an upper portion of a backside surface thereof, and a protruding portion provided at a lower portion of the backside surface. A first hollow portion is provided on a heel side from a bottom surface of a recess portion to a sole surface; and a second hollow portion is disposed on a toe side. The first hollow portion and the second hollow portion do not exist behind a sweet area. The first hollow portion and the second hollow portion may be filled with a shock absorber formed of a rubber or an elastomer.

Claims

1. An iron head comprising:

a striking face;

a backside surface;

a sole surface;

a hosel;

a recess portion provided in an upper portion of the backside surface;

a protruding portion provided at a lower portion of the backside surface and projecting backward;

a first hollow portion provided on a heel side of the protruding portion; and

a second hollow portion disposed on a toe side and inside the protruding portion, said protruding portion including a middle portion between the first hollow portion and the second hollow portion,

wherein said first hollow portion is disposed away from the second hollow portion by a distance gradually increasing from an upper surface of the protruding portion toward the sole surface.

2. The iron head according to claim 1, wherein at least one of said first hollow portion and said second hollow portion penetrates from an upper surface of the protruding portion to the sole surface, and has a first lid to close the sole surface.

3. The iron head according to claim 1, wherein at least one of said first hollow portion and said second hollow portion has a second lid to close an upper portion thereof.

4. The iron head according to claim 1, wherein said first hollow portion is disposed away from the second hollow portion by the distance equal to a distance between the upper surface of the protruding portion and the sole surface.

5. The iron head according to claim 1, wherein said first hollow portion is disposed away from the second hollow portion by the distance of 10 to 30 mm.

6. The iron head according to claim 1, wherein said first hollow portion is disposed away from the second hollow portion by the distance of 10 to 30 mm at the upper surface of the protruding portion.

7. The iron head according to claim 1, wherein at least one of said first hollow portion and said second hollow portion is disposed not to reach the sole surface.

8. The iron head according to claim 1, wherein at least one of said first hollow portion and said second hollow portion is filled with a shock absorber.

10. The iron head according to claim 1, wherein said striking face includes a plurality of score lines including a longest score line, said middle portion being disposed so that a center line of the middle portion is aligned with a center line of the longest score line.

11. The iron head according to claim 1, wherein said first hollow portion has a first length in a vertical direction, said second hollow portion having a second length in the vertical direction greater than the first length.

9. The iron head according to claim 9, wherein said shock absorber is made of a rubber or an elastomer.