Underwater air pocket work unit

Details Underwater air pocket work unit Underwater air pocket work unit

1979-03-23

1981-09-08

Blix, Trgyve M.

Hydraulic and earth engineering

Diving

Underwater docking or mooring

405 11, 114222, 114315, 114125, B63L 1110

Patent

active

042881765

ABSTRACT:
An underwater air pocket work unit has a work chamber contained within a double walled flotation chamber, the upper end of which has a resilient gasket to seal against the hull of a vessel, or other submerged structure. The work chamber is open completely through the structure to provide unobstructed access at both ends and the flotation chamber is open at the lower end. Valves are provided for admitting pressurized air to the flotation chamber to control the buoyancy for holding the structure in place, and for admitting air to the work chamber as necessary for working space. Both chambers have dump valves for releasing the air and the work chamber has window ports for holding work lights. Vent ports extend through side walls of the work chamber for enabling air to flow from the work chamber into the water outside the work chamber to thereby limit the maximum depth of the air pocket to enable a workman floating at the water surface in the work chamber to comfortably reach an overhead underwater work surface on the hull of the vessel.

REFERENCES:
patent: 1619642 (1927-03-01), Ward
patent: 3857249 (1974-12-01), Kelly

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