Hydraulic and earth engineering – Marine vessel portage – launching – or removing – Lifting
Patent
1995-09-21
1997-12-02
Graysay, Tamara L.
Hydraulic and earth engineering
Marine vessel portage, launching, or removing
Lifting
114 44, B63C 306
Patent
active
056928572
ABSTRACT:
Single acting water hydraulic cylinders are used to raise floor platforms in aquatic environments. A first cylinder with a vertically raisable piston is positioned on one side of a platform while a second cylinder with a vertically raisable piston is positioned on an opposite side of the platform. Each cylinder controls two corners of the platform through wire ropes that pass through plural sheaves. The single acting water hydraulic piston can use city water pressure to raise the platform, while three way valves allow gravity to allow the platforms to be lowered. The platforms can include a grid type grate that can be used to raise and lower marine mammals (i.e. whales, dolphins, manatees, walrus), aquatic animals (i.e. hippo) and marine fishes (i.e. sharks, stingrays) from an artificial habitat such as as a park pool. The platform can alternatively be fired with pivotable pads for lifting vessels such as small crafts from slips. The cylinders can be positioned on the top side edges of a pool, to the surface of a dock or the top surface of a pier. A still another version incorporates a mounting platform that allows the cylinders to be supported on the seafloor itself.
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Graysay Tamara L.
Lagman Frederick L.
Steinberger Brian S.
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