Tennis ball evaluator
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jun 25, 1985
Grant Date -
N/A
app pub date -
Oct 5, 1983
filing date -
Oct 5, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An apparatus and device for evaluating the surface roughness of a tennis ball or other objects. The object is placed in flowing gas and the drag force applied on the object is measured. By repeating the procedure with objects having different surface roughness a cross-reference table is developed between drag force and surface roughness. The apparatus comprises a scale supporting the object. The object is placed in a tube and gas is blown through the tube past the object, while the drag force on the object is measured by the scale.
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Family
International Classification(s)
Cited Art Landscape
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