Patent ID: 6953328

Claim:
A buoyancy pump for use in a fluid, comprising: a buoyancy block housing defining a buoyancy chamber therein through which the fluid may flow; a buoyancy block disposed within the buoyancy chamber to move axially therein in a first direction responsive to rising of the fluid in the buoyancy chamber and a second direction responsive to lowering of the fluid in the buoyancy chamber; a piston cylinder connected to the buoyancy block housing; at least one valve disposed in the piston cylinder operating as an inlet in response to movement of the buoyancy block in the second direction and an outlet in response to movement of the buoyancy block in the first direction; a piston slideably disposed within the piston cylinder and connected to the buoyancy block, the piston being moveable in the first and second directions and responsive to movement of the buoyancy block and in the second direction to draw a fluid substance into the piston cylinder through the at least one valve, and responsive to movement of the buoyancy block in the first direction to output the fluid substance through the at least one valve; a base connected to the buoyancy block housing; and wherein the base comprises a storage tank for the fluid substance.