Patent ID: 7703274

Claim:
A pintle injector, having a pintle injector part, said pintle injecting part having propellant channels for transmitting fuel and oxidizer as propellants, said propellant channels project into a combustion chamber for injecting said propellants, comprising: the pintle injector part includes on the outer peripheral surface thereof a first pintle injector port and a second pintle injector port injecting one of the propellants, said first pintle injector port having an injecting alignment of the radial direction, a flow reversing first injector flow path, upstream of the first pintle injector port, is formed as a regenerative cooling path having a plurality of first injector paths spaced at equal intervals between an outer wall and an internal wall of the pintle injector part, and an axial injector port, located upstream of the first pintle injector port, having injecting alignment of the axial direction, for injecting one of the propellants, wherein the propellants injected into the combustion chamber constitute at least one fuel propellant and one oxidizer propellant so that when the propellants injected into the combustion chamber from the axial injector port, the first pintle injector port and the second pintle injector port are mixed due to colliding and sandwiching with each other, the atomization of fuel and oxidizer are promoted, wherein the propellants injected into the combustion chamber having same temperatures, states and properties or different temperatures, states and properties or combination of same or different temperatures, states or properties.