Self-leveling boat hull support

Details Self-leveling boat hull support Self-leveling boat hull support

1995-09-08

1997-04-22

Graysay, Tamara L.

Hydraulic and earth engineering

Marine vessel portage, launching, or removing

Dry dock

405 3, 2804141, B63C 504

Patent

active

056224478

ABSTRACT:
A boat hull support has a pair of support members each pivotally attached to a respective upright. The inner ends of the support members oppose each other. One of the inner ends mounts a pair of cam plates having aligned banana-shaped cam openings. The other inner end mounts a follower rod received in the cam openings. The cam openings are shaped so that movement of one of the support members about its pivot will be translated into an equal and opposite movement of the other. The support members are urged to a generally horizontal position by leaf springs or elastomer blocks bearing against the underside of the support members.

REFERENCES:
patent: 1407375 (1922-02-01), Burbank
patent: 1515435 (1924-11-01), Glover
patent: 1614131 (1927-01-01), Johnson
patent: 2470396 (1949-05-01), Guerette
patent: 2503535 (1950-04-01), Yarbrough
patent: 3139277 (1964-06-01), Mears
patent: 3379314 (1968-04-01), Canning
patent: 3586285 (1971-06-01), Modzelewski
patent: 4155667 (1979-05-01), Ebsen
patent: 4944633 (1990-07-01), Robb
patent: 5186576 (1993-02-01), Fournier

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