Patents Represented by Attorney Prithvi Lall

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  • System for reducing drag and noise of underwater vehicles
    Patent number: 4987844
    Abstract: A means and method for simultaneously reducing drag and noise of a high-sd underwater vehicle is provided. Water is admitted through a water intake scoop in the nose of the vehicle and a polymer powder-gas combination is injected into the water stream in the scoop. The water, polymer and gas are mixed in a mixing chamber into which the scoop empties and are ejected through a circumferential ejector disposed at the minimum pressure point.
    Type: Grant
    Filed: February 17, 1971
    Date of Patent: January 29, 1991
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Richard H. Nadolink