Patent ID: 6575105
Filing Date: 2003-06-10
Classification: B63C

Abstract:
A device for changing a depth of an object, comprising:a connection (8) for an object whose depth is to be changed; a supply (1) of compressed air; a first tank (Sg) having an air volume corresponding to a weight of the device; a second tank (S) connected to said first tank and filled with air and water, said second tank having a first opening (10) for passage of water to and from outside said second tank; a float (G) that floats on water in said second tank; and a valve assembly (V) on said second tank, said valve assembly including, a first valve (2e) that selectively connects said supply of compressed air to said second tank, a second valve (2u) that selectively releases air from said second tank, a first movable member (5) having a first projection for operating said first valve and a second projection for operating said second valve, and a second movable member (3) connected to said float and whose position relative to said first movable member is adjustable from outside the device, wherein movement of said first movable member in a first direction operates said first valve to increase a buoyancy of the device and movement of said first movable member in a direction opposite the first direction operates said second valve to decrease the buoyancy of the device.