Golf club shaft and its manufacturing mandrel

Details Golf club shaft and its manufacturing mandrel Golf club shaft and its manufacturing mandrel

1994-08-08

1995-05-09

Passaniti, Sebastiano

Amusement devices: games

Aerial projectile game; game element or accessory therefor...

Target

273DIG23, A63B 5310

Patent

active

054133386

ABSTRACT:
The outer circumferential surface of a mandrel in a bar-shaped configuration is wound with reinforced fiber impregnated with a resin. This reinforced fiber is heat-treated and hardened, to thereby form a reinforced fiber layer in a tubular configuration around the mandrel. The mandrel is provided with a reduced portion in the axial middle thereof, which is decreased in the outside diameter thereof. This mandrel comprises a basic end side member and a terminal end side member which are both connected such that they can be separated at the reduced portion. The separation of both component members of the mandrel is conducted axially in opposite directions, and this allows the detachment of the mandrel out of the reinforced fiber layer.

REFERENCES:
patent: 2809144 (1957-10-01), Grimes
patent: 3313541 (1967-04-01), Benkoczy
patent: 4000896 (1977-01-01), Lauraitis
patent: 4288075 (1981-09-01), Kaugars
patent: 4319750 (1982-03-01), Roy

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