Power plants – Reaction motor – Particular exhaust nozzle feature
Reexamination Certificate
2005-06-14
2005-06-14
Gartenberg, Ehud (Department: 3746)
Power plants
Reaction motor
Particular exhaust nozzle feature
C239S265150, C029S890010
Reexamination Certificate
active
06904755
ABSTRACT:
The rocket motor nozzle assembly of this invention includes a throat insert and a carbon or silica protective eyelid. The throat insert has a carbon throat support and a refractory metal shell. The shell is positioned radially inside the throat support to cover the inner surface of the throat support. The protective eyelid covers a sufficient portion of the forward surface region of the shell and the underlying converging portion of the throat support to protect these components against particle impingement. The protective eyelid extends sufficiently far forward along the converging/diverging pathway to cover and protect the forward face or edge of the throat insert and prevent the combustion gases from passing under the throat insert and reaching the radially outer surfaces of the throat insert. However, the protective eyelid leaves the throat surface region of the shell exposed to the converging/diverging pathway.
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O'Dell, J. Scott, et al., “Development of Near Net Shape Refractory Metal Components Utilizing Vacuum Plasma Spray,” Tungsten Refractory Metals and Alloys 4, Int'l. Conference, 1997.
Canfield Alan R.
Shigley John K.
Alliant Techsystems Inc.
Gartenberg Ehud
TraskBritt
LandOfFree
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