Hollow metal alloy wood-type golf head

• US 5,346,217 A
• Filed: 02/06/1992
• Issued: 09/13/1994
• Est. Priority Date: 02/08/1991
• Status: Expired due to Fees

• Current Assignee: Yamaha Corporation
• Original Assignee: Yamaha Corporation
• Inventors: Iijima, Kenzaburo, Tsuchiya, Kazuhiro, Hoshi, Toshiharu, Tsuchida, Atsushi
• Primary Examiner(s): Harrison, Jessica J.
• Assistant Examiner(s): Pierce, William M.
• Application Number:
  US07/832,057
• Time in Patent Office: 950 Days
• Field of Search: 273/167 R, 273/167 H, 273/167 J, 273/172, 273/78
• US Class Current: 473/345
• CPC Class Codes: A63B 53/04 Heads
• CPC Class Codes: A63B 53/0408 characterised by specific dimensions, e.g. thickness
• CPC Class Codes: A63B 53/0412 Volume
• CPC Class Codes: A63B 53/0416 Heads having an impact surface provided by a face insert
• 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

In construction of a wood club head having a main body of a hollow metallic shell construction, the face thickness is limited to 2 to 4 mm and the entire head volume is limited to 190 cc or larger for enlargement of its sweet spot. The enlarged sweet spot assures a long flying distance of a ball in an intended direction through its improved mating with the ball at the very moment of striking.

Claims

1. A metal wood type golf head, comprising a hollow metallic shell having a face, a crown, a sole and a volume defined by its external dimensions, said face, said crown and said sole each having respective thicknesses, said thickness of said face being in a range from 2 to 4 mm and said volume being 190 cc or larger, at least a part of said face being made of Ti alloy of a composition which contains 3 to 6% by weight of Al, 2 to 4% by weight of V, 1 to 3% by weight of Mo. 1 to 3% by weight of Fe and Ti in balance.

2. A golf wood club head as claimed in claim 1 in which

said thickness of said face is in a range from 2 to 3.5 mm, the head has a height of 40 mm or larger and has a width of 70 mm or larger.

3. A golf wood club head as claimed in claim 1 in which

the thickness of said face is in a range from 2 to 3.5 mm, the thickness of the crown is in a range from 0.6 to 3 mm and the thickness of the sole is in a range from 1 to 3 mm.

4. A golf wood club head as claimed in claim 3 in which said head has a moment of inertia which is 3000 g*cm² or larger and has a specific inertia value which is 400 or larger.

5. A golf wood club head as claimed in claim 3 in which said head has a weight which is 210 g or smaller.