Ships – Vessel raising and docking – Floating dry docks
Patent
1975-05-02
1976-04-20
Blix, Trygve M.
Ships
Vessel raising and docking
Floating dry docks
61 65, 214 1A, B63C 16
Patent
active
039510875
ABSTRACT:
The present invention relates to a boat dry docking apparatus for installation in a boat dock having substantially parallel sides. An elongated frame is provided adapted to be disposed horizontally in the boat dock and a boat supporting cradle and flotation tank are mounted on the frame. A pair of spaced apart arm members are pivotally attached at the lower ends thereof to each side of the frame and bolts are connected to the upper ends of the arm members for pivotally connecting the upper ends to the sides of the boat dock. The arm members are of a length such that when the bolts for pivotally connecting the upper ends thereof to the dock are attached to the dock in a manner whereby the upper pivotal connections of the arm members are positioned substantially vertically above the lower pivotal connections to the frame, the frame is free to swing between a lower horizontal position beneath the water level in the boat dock whereby a floating boat can be positioned above the boat cradle and an upper horizontal position whereby the boat cradle is above the water level. An air blower and connecting conduit for selectively filling the flotation tank with air are provided to raise the frame to the upper position or exhausting air therefrom to lower the frame to the lower position.
REFERENCES:
patent: 3270698 (1966-09-01), Fort
patent: 3362172 (1968-01-01), Rutter
patent: 3603276 (1971-09-01), Delisle
patent: 3727415 (1973-04-01), Williams
patent: 3857248 (1974-12-01), Rutter
patent: R27090 (1971-03-01), Rutter
Blix Trygve M.
Dougherty, Jr. C. Clark
Goldstein Stuart M.
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