Abstract: Devices, systems, and associated methods that facilitate the injection and/or aspiration of precisely controlled volumes of fluids at precisely controlled rates are provided. In some implementations, an apparatus may include a syringe and a lead screw connected to a plunger of the syringe. A ratchet gear may be connected to the lead screw. A mechanism may also be included to oscillate a frame in a direction perpendicular to a longitudinal axis of the lead screw such that one or more pawls of the frame engage the teeth of the ratchet gear in a manner that results in rotation of the ratchet gear in a single direction for controlled linear displacement of the plunger.

Abstract: A high speed pneumatic valve has a housing enclosing a cavity with an inlet port and an outlet port. A permanently magnetized armature is located in the cavity. The permanently magnetized armature moves between a first, open position and a second, closed position. A coil and magnetic core assembly is located near the armature in the housing. A first voltage applied across the coil results in a magnetic field with a first polarity being induced in the magnetic core thereby attracting the armature toward the magnetic core and away from the outlet port. A second voltage applied across the coil results in a magnetic field with a second, opposite polarity being induced in the magnetic core thereby repelling the armature away from the magnetic core and toward the outlet port.