Measuring and testing – Center of gravity; turning moment; metacentric height – Ball driving sporting implement
Reexamination Certificate
2005-04-12
2005-04-12
Lefkowitz, Edward (Department: 2855)
Measuring and testing
Center of gravity; turning moment; metacentric height
Ball driving sporting implement
C177S171000, C073S065010
Reexamination Certificate
active
06877364
ABSTRACT:
A swing weight scale is presented that measures the swing weight of a golf club by measuring the torque exerted by the club about fixed balance point. The apparatus comprises an elongated torque arm pivotally mounted to a base. At one end of the torque arm a pair of rollers cradle the shaft of the golf club from underneath. At the other end of the torque arm a vertical stop provides a reference for locating the butt of the golf club shaft and provides the mounting surface for a second pair of rollers that cradle the upper surface of the shaft at the butt end. The rollers allow the golf club shaft to freely rotate about its longitudinal axis so that the golf club head will hang down freely. A torque sensor is mounted at the pivot point of the torque arm to measure the torque produced by the golf club as it is supported by the torque arm. A simple computer program converts the torque produced by the golf club on the torque arm into swing weights based on the known dimensions, weight and other parameters of the apparatus.
REFERENCES:
patent: 2595717 (1952-05-01), Smith
patent: 3371523 (1968-03-01), Crouch et al.
patent: 3577771 (1971-05-01), Solheim
patent: 5727399 (1998-03-01), Bergagnini
patent: 6363620 (2002-04-01), Goodjohn
Karsten Manufacturing Corp.
Marquette Darrell
Martir Lilybett
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