Amusement devices: games – Aerial projectile game; game element or accessory therefor... – Target
Patent
1988-11-23
1990-10-09
Grieb, William H.
Amusement devices: games
Aerial projectile game; game element or accessory therefor...
Target
273 72A, 273 80R, 72367, 148 115F, A63B 5312, A63B 5900
Patent
active
049615769
ABSTRACT:
A hollow metallic shaft for sporting implements includes a cylindrical tip section having a first constant wall thickness, a shank section including a tapered portion and having a second constant wall thickness, and a cylindrical portion located adjacent the tapered portion and opposite the tip section. An increase in wall thickness provides additional reinforcement at the tip section. The method of making the shaft includes an initial rotary swaging of an end portion of the shaft followed by a series of sink drawing operations to form a stepped contour on the outer periphery of the shaft. A final rotary swaging of the stepped contour provides the shaft with a smooth taper towards one end.
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Titanalloy, "Golf World", Jan. 24, 1975, p. 26.
Grieb William H.
Passaniti Sebastiano
Sandvik Special Metals Corporation
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