Molded nozzle for rocket motor
AssigneeHer Majesty the Queen in right of Canada, as represented by the Minister of National Defence
InventorsMichael N. Clark, Donald L. Smith
Life of this patent
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Abstract
A lightweight, relatively inexpensive rocket nozzle assembly which is heat resistant, ablative and electrically insulating. The body of the nozzle is molded in fibre reinforced thermosetting resin integrally with a forward metallic retaining ring, a rear metallic fin supporting ring and an electrical contact ring. A graphite throat insert is also provided and helical vanes are integrally molded into the rear portion of the nozzle to effect rotary motion of the exhaust gases. Wrap around fins are secured externally of the nozzle and provided with a retainer ring-shear pin assembly to hold the fins in the closed position for transport, and spring means to deploy the fins after firing and shearing of the shear pins.
Claims10
A rocket nozzle assembly comprising:
- (a) an ablative fibre-reinforced thermosetting plastic nozzle body having a throat and an exit for positioning in a rocket motor chamber;
- (b) an elongated metallic retaining ring integrally molded in an circumscribing said body adjacent said throat for positioning said nozzle body in said rocket motor chamber and to spread out aerodynamic and thermal expansion loads over the nozzle body and transmit these loads to the rocket motor chamber;
- (c) a metallic fin supporting ring integrally molded in and circumscribing said body adjacent said exit;
- and
- (d) a metallic electrical contact ring integrally molded in and circumscribing said exit electrically insulated from the rocket and adapted to be electrically connected to a firing circuit.
Dependencies are inferred from the claim text.