Golf club head

Details Golf club head Golf club head

1991-09-26

1993-04-27

Millin, V.

Amusement devices: games

Puzzles

Take-aparts and put-togethers

273 78, A63B 5308

Patent

active

052055604

ABSTRACT:
A hollow metallic wood club head formed of a superplastic metallic material to have a crown portion, a hitting face portion and a sole portion, wherein the rigidity of the crown portion is determined to be lower than that of the sole portion so that the loft angle of the face portion is increased at the moment of impact against a golf ball in an angle range of 0.5.degree.-2.5.degree., and wherein the metallic average grain size of the crown portion is determined to be less than 50 micron.

REFERENCES:
patent: 708575 (1902-09-01), Mules
patent: 777400 (1904-12-01), Clark
patent: 1359220 (1920-11-01), Beamer
patent: 3387844 (1968-06-01), Shippee
patent: 3989248 (1976-11-01), Campau
patent: 4021047 (1977-05-01), Mader
patent: 4432549 (1984-02-01), Zebelean
patent: 4602787 (1986-07-01), Sugioka et al.
patent: 4749197 (1988-06-01), Orlowski
patent: 4754969 (1988-07-01), Kobayashi
patent: 5028049 (1991-07-01), McKeighen
"Golf Digest" Magazine, Jan. 1978, issue, pp. 112, 113.

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