Buoys – rafts – and aquatic devices – Swimming aid to increase stroke efficiency – Foot attached
Reexamination Certificate
2006-11-14
2006-11-14
Swinehart, Ed (Department: 3617)
Buoys, rafts, and aquatic devices
Swimming aid to increase stroke efficiency
Foot attached
Reexamination Certificate
active
07134927
ABSTRACT:
A heel mounted reversible fin assembly for propelling kick boats and float tubes in water. The assembly includes a base mounting mechanism (1) which secures the assembly on a user's boot heel, and an inter-connected generally perpendicularly inclined fin member (4) which extends below the user's boot sole. Apertures (52) extending through the fin blade (50) adjacent to cleavages (46) in ribs (47) define a hinge portion (49) about which the blade (50) flexes to feather on return kicks in the direction of the rear surface (48) of the blade (50). Raised ribs (47) extending generally perpendicularly outward from the rear surface (48) of the fin blade (50) inter-connect, providing a stop mechanism to retain the blade (50) in a generally rigid configuration on power kicks in the direction of its front surface (51). The deep under sole position of the fin blade (50) and flexure limiting ribs (47) co-operate to provide a “quiet” stealthy progress in water without the rebound splashing (SPL) and surface disturbances caused by conventional fins. In the preferred embodiment the mounting member (2) and fin member (4) are separate inter-connecting components by which the fin member (4) is reversible on the mounting member (2) to selectively propel either in a forward or backward direction.
REFERENCES:
patent: 1794883 (1931-03-01), Corder et al.
patent: 2395844 (1946-03-01), Bufkin
patent: 3082422 (1963-03-01), Cousteau et al.
patent: 3204951 (1965-09-01), Grain
patent: 3268927 (1966-08-01), Markowitz
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Glenn Christiansen “Don't laugh. Its a bellyboat” Sunset magazine, Apr. 1982 pp. 106-109 Pertinet reference is page 108, last 2 sentences of Col. 1, through first 3 sentences of Col. 2, and middle of Col. 3. —Fishmaster Mfg. Co. address.
“Paddle Pushers” product literature sheet.
“Float Striders” Forward Propulsion Fins product literature sheet.
Dux Fin Co.
Swinehart Ed
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