Rocket motor and solid propellent grain with woven polymeric inhibitor coating

Claim 1

IN A ROCKET MOTOR, COMPRISING A COMBUSTION CHAMBER AND PROVIDED REARWARDLY WITH A RESTRICTED NOZZLE, A CYLINDRICAL, SOLID PROPELLENT GRAIN, COMPRISING A SELF-OXIDANT, GAS-PRODUCING COMPOSITION, SEATED THEREIN, THE EXTERIOR CYLINDRICAL SURFACE OF SAID GRAIN BEING INGIBITED AGAINST IGNITION BY A SOLID INHIBITOR COATING, OF SUFFICIENT THICKNESS TO PROVIDE SUBSTANTIAL HEAT INSULATION, BONDED THERETO, SAID COATING CONSISTING ESSENTIALLY OF AN EPOXY POLYMER CONTAINING, AS AN INTEGRAL PORTION THEREOF, AT LEAST ONE LAYER OF A POROUR SHEET CONSISTING ESSENTIALLY OF AN ORGANIC POLYMER MATERIAL SAID ORGANIC POLYMER MATERIAL BEING SELECTED FROM THE GROUP CONSISTING OF POLYAMIDE, POLYACRYLONITRILE, POLYACRYLATE ESTER, POLYMETHACRYLATE ESTER, POLYESTER, POLYETHYLENE, CELLULOSE ESTER, CELLULOSE ETHER, POLYVINYL, COTTON, AND RAYON, SAID INHIBITOR COATING BEING BONDED CIRCUMFERENTIALLY AT ITS FORWARD END TO A REARWARDLY PROJECTING EXTENSION, CONCENTRIC THEREWITH, OF THE FRON WALL CLOSURE OF SAID COMBUSTION CHAMBER.