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US 7,841,972 B1Granted
Dumbbell
AssigneeMichael Lin
InventorsHsuan Fu Huang, Ming Nan Chen
Life of this patent
Estimating the term…
Abstract
A dumbbell includes a handle, a weight unit and two caps for retaining the weight unit within the handle. The weight unit includes weights and springs alternately arranged within the handle. Each of the caps is located against a related one of the springs so that the weights do not hit the handle axially.
Claims13
A dumbbell comprising:
- a handle;
- a weight unit comprising weights and springs alternately arranged within the handle;
- two caps for retaining the weight unit within the handle, wherein each of the caps is located against a related one of the springs so that the weights do not hit the handle axially;
- the weight unit comprising a rod inserted through the weights and the springs and connected to the caps, each of the caps including an annular space defined therein;
- and
- two balls respectively received in the annular space in a corresponding one of the two caps.
3 more elements
Dependencies are inferred from the claim text.