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US 4,907,800 AGranted
Bat swing practice apparatus
OwnerRichard S. Passamaneck, Larry G. Nelsoninventors
Life of this patent
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Abstract
The training aid has a handle with a fan section at its far end. The fan section provides resistance to swinging the handle. The fan section has a rotatable fan and a friction element which varies the rotational resistance of the fan.
Claims16
A device, comprising:
- a fan having a plurality of fan blades;
- a housing mounting said fan for rotation relative thereto;
- an elongated handle attached to said housing to permit a subject to swing said housing such that said fan rotates by relative motion between said fan and ambient to produce a resistance to said swinging and provide exercise to said subject;
- and
- means for adjusting rotational resistance of said fan such that the amount of exercise obtained by swinging said handle can be adjusted.
2 more elements
Dependencies are inferred from the claim text.