Ships – Vessel raising and docking – Floating dry docks
Patent
1990-02-27
1992-03-31
Swinehart, Ed
Ships
Vessel raising and docking
Floating dry docks
114 48, B63C 102
Patent
active
050997785
ABSTRACT:
This invention comprises an improved system for raising and lowering an object, most usually a craft, from and into the water. This improved system includes a plurality of pistons, usually disposed at each corner of a rectangular frame, actuated by a remotely disposed valve system which is connected to a common water hose. The pistons are comprised of a pair of cylinders one portion of which is secured to a slip or float and the other portion of which is secured to the craft-supporting rectangular frame. When water is introduced into the system, the craft is raised from the water and when the fluid is evacuated from the system, the craft is lowered.
REFERENCES:
patent: 3338334 (1967-08-01), Matthews
patent: 3777691 (1973-12-01), Beale
patent: 3850107 (1974-11-01), Klinkhammer et al.
patent: 4773346 (1988-09-01), Blanding et al.
Hall James D.
Swinehart Ed
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