Retractable water board fin

Details Retractable water board fin Retractable water board fin

1988-02-01

1989-02-21

Basinger, Sherman D.

Ships

Centerboards

Pivoted

114 392, 114127, 441 74, 74475, 74525, B63B 4100

Patent

active

048055468

ABSTRACT:
A generally trapezoidal fin (22) is pivotally fastened to a casing which can receive the entire fin, permitting total retraction of the fin. The casing is formed with at least one notch (42) for selectively positioning the fin relative to the casing. In a preferred embodiment, the fin is operated by a lever member (26) which has a knob (50) at its distal end for use in positioning the fin (22) from above.

REFERENCES:
patent: 3066327 (1962-12-01), Durfey
patent: 3082444 (1963-03-01), Estes
patent: 3087173 (1963-04-01), Meyer
patent: 3287991 (1966-11-01), Eckert
patent: 3516100 (1970-06-01), Ellis
patent: 3902441 (1975-09-01), Scholle
patent: 4398485 (1983-08-01), Diziere
patent: 4493665 (1985-01-01), Liddle
patent: 4566349 (1986-01-01), Van der Loon et al.

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