Patent ID: 7900435

Claim:
A micro-coaxial injector for a rocket engine having a combustion chamber, the micro-coaxial injector comprising: a first plate having a first surface and an opposite second surface; a plurality of channels formed in a first annular portion of the first plate, wherein the first plate comprises a solid section radially inside the first annular portion, the solid section being devoid of such channels; a second plate having a first surface facing the first surface of the first plate and having a second surface facing opposite the first plate; and a plurality of tubes extending through the second plate and into the plurality of channels and configured to inject a first propellant into the combustion chamber, each of the plurality of tubes extending past the second surface of the second plate, wherein the plurality of channels is configured to inject a second propellant into the combustion chamber, wherein the second surface of the first plate comprises a second annular portion radially outside the first annular portion, and wherein the second annular portion is angled with respect to the first annular portion, and wherein the first surface of the first plate facing the second plate comprises a chamfer formed around each of the plurality of channels.