Punching elasticity adjustment structure
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United States of America Patent
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Jan 13, 2015
Issued Date -
N/A
app pub date -
Dec 12, 2011
filing date -
Oct 31, 2011
priority date (Note) -
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Abstract
The present invention discloses an elasticity adjustment structure of physical training device which comprise one elastomer adjustment set; said elastomer adjustment set further comprises one first elastomer and one second elastomer. Overlapping the said second elastomer and said first elastomer with different rigidities at different depth positions to create a smooth elastic curve of said elastomer adjustment set; as a result the elasticity of said elasticity adjustment structure may be adjusted in accordance with different needs.
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