Pyrotechnic valve, igniter and combustion preheater for hybrid r

Power plants – Reaction motor – Solid and fluid propellant

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60253, F02K 972

Patent

active

055796362

ABSTRACT:
A pyrotechnic valve, igniter and combustion preheater for hybrid rocket motors is described. Particularly, the present invention comprises a ported connection means in which is mounted a solid charge of pyrotechnic material which provides a barrier to and obstructs the flow ports of the connection means to maintain the physical separation of the fluid propellant from the solid propellant. In operation, the solid charge is ignited and burns which burning consumes the charge and thereby removes the barrier to fluid propellant flow. The preferred pyrotechnic charge also ignites the solid propellant and thereby initiates combustion. The ported connection means may also include a preheater chamber in which is disposed a hollow or slotted cylinder of solid fuel which when burned, reacts with and heats the fluid oxidizer as it flows to the main combustion chamber to increase the ignitability and combustion efficiency of the solid fuel grain disposed therewithin.

REFERENCES:
patent: 2736459 (1956-02-01), Cockram et al.
patent: 3088478 (1963-05-01), Schimmel
patent: 4075832 (1978-02-01), Diesinger et al.
patent: 4424679 (1984-01-01), Holzman

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