LOW NOISE WRIST STRENGTH TRAINING BALL
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United States of America Patent
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Issued Date -
Jun 5, 2014
app pub date -
Mar 8, 2013
filing date -
Dec 5, 2012
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A low noise wrist strength training ball includes a case, a sleeve ring, a rotary body and a magnetic element. The sleeve ring is slidably disposed inside the case and is adapted for sliding relative to the case. The rotary body includes two protruding shafts opposite to each other. The two protruding shafts are pivotally connected to the sleeve ring and are adapted for rotating relative to the sleeve ring. The magnetic element is disposed in the sleeve ring and corresponds to one of the two protruding shafts. The magnetic element is adapted for magnetically attracting the one of the protruding shafts to press against the sleeve ring.
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