Accession Number : ADD014639

Title :   Submarine Torpedo Tube Collapsible Choke.

Descriptive Note : Patent Application, Filed 18 Jun 90,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Moody, Paul

Report Date : 18 Jun 1990

Pagination or Media Count : 11

Abstract : This patent application discloses a bimodal flow restriction device having an open condition and a closed condition. In its open condition, an annular fluid flow path defined between a torpedo enclosed within a larger torpedo tube is open to support a torpedo launch in a swim-out mode. In order to facilitate a swim-out mode. In order to facilitate a swim-out launch, water must flow from the forward portion of the torpedo, along its body and into its propeller. In its closed condition, the annular fluid path defined between the torpedo closed within the larger torpedo tube is closed-off to enable torpedo launch in a pump-ejection mode. In the preferred embodiment, plural, cooperative elbows are disposed about an inside circumference of the torpedo tube, and are radially movable between a closed condition, where they provide an annular impediment in the annular fluid flow path to enable operation in the pump-ejection mode, and an open condition, where the annular fluid flow path is open, to enable operation in the swim-out mode. Each of the radially-movable cooperative elbows is preferably keystone-shaped, and includes rubber or other elastomeric bumper members to provide low-noise operation. Keywords: Annular fluid flow; Torpedoes; Torpedo tubes. (rwj)

Descriptors :   *PATENT APPLICATIONS, *TORPEDO TUBES, ANNULAR FLOW, DUAL MODE, FLOW, FLOW FIELDS, FLUID FLOW, FLUIDS, LAUNCHING, LOW NOISE, OPERATION, PATHS, PROPELLERS, RUBBER, TORPEDOES, WATER

Subject Categories : Torpedoes

Distribution Statement : APPROVED FOR PUBLIC RELEASE