Hydraulic and earth engineering – Diving – Underwater docking or mooring
Patent
1989-02-13
1989-09-19
Corbin, David H.
Hydraulic and earth engineering
Diving
Underwater docking or mooring
405 52, 405194, 405270, B63C 1100, E02B 300
Patent
active
048676080
ABSTRACT:
A working chamber is placed in a lined pond containing a body of contaminated water and filled with clean water to safely isolate divers while they repair damaged areas of the liner. The chamber is an open ended housing having a side wall of water impervious material configured to surround the area of liner damage and a height greater than the depth of the body of water at the repair site. Buoyancy tanks float the housing in a stable upright position above the repair site and are filled with clean water to sink the housing to rest its bottom end on the liner at the bottom of the body of water. A deformable seal on the bottom end of the housing engages the liner surface surrounding the area of liner damage and is filled with water to forming a substantial water sealing relation therewith but with controlled leakage. Clean water is conducted into the chamber interior at a predetermined rate to displace contaminated water inside the chamber. A pump may also be utilized to remove contaminated water from the interior of the chamber. The inlet rate and leakage or removal rate are controlled to provide a column of continuous clean water within the chamber sufficiently safe for human divers to enter the chamber and repair the damaged liner. After the repair, the buoyancy tanks and bottom seal are filled with air and the chamber may be floated to another location or removed.
REFERENCES:
patent: 4047390 (1977-09-01), Boyce
patent: 4283159 (1981-08-01), Johnson et al.
patent: 4373834 (1983-02-01), Grace
patent: 4735524 (1988-04-01), Dunkers
patent: 4806435 (1989-02-01), Athey
Corbin David H.
Mosely Neal J.
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