| 摘要 |
Metal wood and wood clubs with a "swing-weight housing" using "variable swing-weights" creating a variable swingweight", an "automatic counterbalancing" effect and "varied center of gravity" effects in addition to an increased trajectory and shot distance to the golf ball when hit. The "swing-weights" are housed in a "swing-weight housing" within the golf club cavity. On address, the club head total weight is the "swing-weights" plus the club head. On the upswing the "swing-weights" travel from the "swing-weight housing" through the hosel cavity, into the hollow shaft, coming to rest in the grip end of the hollow shaft. On the downswing the "swing-weights" reverses its travel to the club head, picking up momentum and slightly increasing club head speed. The velocity of the club head plus the combined weights of the "swing-weights and club head, gives a greater trajectory and shot distance when the ball is hit, since the energy imparted to the ball is proportional to the effective mass of the club head times the square of the club head velocity.
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