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US 4,832,631 AGranted
Swimming aid
OwnerMarvin N. Gaginventor
Life of this patent
Estimating the term…
Abstract
A manually powered pair of crank operated flat paddles used by a swimmer combines a rotary and paddling motion. One paddle is rotated to engage the water while the opposite paddle is disengaged and provides flotation only. The opposite paddle is then rotated to engage the water while the first paddle is disengaged. This apparatus combines support with propulsion to assist the beginning swimmer. The motion of the swimmer's arms using this device mimics a normal swimming stroke and aids the learning process.
Claims7
Swimming apparatus comprising:
- (a) a pair of generally flat paddles having a density less than that of water, and
- (b) an intermediate shaft connecting said paddles together said shaft having opposed crank arms, and
- (c) a pair of mechanisms attaching said shaft to said paddles said mechanisms having engagement means such that one paddle will be connected to said shaft for approximately one half of a shaft revolution while the opposite paddle is disconnected with the connections reversed for the remaining half of a shaft revolution.
Dependencies are inferred from the claim text.