Abstract: A compact, lightweight thruster assembly (10) is provided consisting of a dual armature piston assembly (24). A single solenoid coil (46) operates either or both armatures (26), (34) depending on the level of applied current to effect either of two levels of predetermined impulse emitting from the thruster nozzle (20).

Abstract: A compact, valve assembly (10) is provided having multiple chambers. A forward chamber (14) retains dual T-shaped blades (36) having shaped orifices (38) for controllably metering at least two fluids passing through the valve assembly. The valve assembly is also provided with a servo-valve assembly (70) and a piston indicator (62) assembly in cooperative association with the valve assembly.

Abstract: A valve assembly (10) is provided in which a piston assembly (36) functions to control the introduction and expulsion of a fluid from external and internal manifolds (28,30) defined by the valve assembly housing (12) and the piston assembly. Extensions (42,44,46) provided with flexible disc seals (48) depend from a crown portion (40) of the piston assembly. The seals interface with a T-shaped annular partition (62) having a raised lip (68) in the base (66). The raised lip interfaces with the seals to close off fluid exit ports (80) in the base of the valve assembly housing. When functioned, the housing assembly and piston cause separation of the lip and disc allowing the flow of fluid through the valve assembly.