Accession Number : ADD015365

Title :   Inflatable Device for Excluding Sea Water from a Rocket Motor.

Descriptive Note : Patent, Filed 18 Dec 91, patented 30 Jun 92,

Corporate Author : COURTNEY AND CO PHILADELPHIA PA

Personal Author(s) : Purser, Michael J

Report Date : 30 Jun 1992

Pagination or Media Count : 10

Abstract : An inflatable water exclusion device for protecting the rocket motor of a solid-propellant-powered missile, launched from below the surface of the sea by means of launching gas, from being damaged by a spout of water spurting up into the atmosphere. The device consists of a round base plate that attaches to an expellable baffle assembly located within the throat of the rocket motor nozzle, and an inflatable elastomer-coated cloth bag that is attached to the rim of the base plate. As the missile ascends toward the surface of the sea, launching gas that was originally contained within the voids of the rocket motor expands and streams out through the nozzle thereby causing the bag to inflate. After the missile has breached the surface of the sea the rocket motor ignites, thereby causing the baffle assembly and the inflatable water exclusion device attached thereto to be expelled from the nozzle and fall back into the sea.

Descriptors :   *ROCKET ENGINES, *SOLID PROPELLANTS, *PATENTS, ASSEMBLY, ATMOSPHERES, BAFFLES, BAGS, ELASTOMERS, FABRICS, LAUNCHING, MOTORS, NOZZLES, OCEANS, PLATES, PROPELLANTS, ROCKETS, SOLIDS, SURFACES, THROAT, WATER, SEA WATER

Subject Categories : Ammunition and Explosives

Distribution Statement : APPROVED FOR PUBLIC RELEASE