Patent ID: 7647883
Filing Date: 2010-01-19
Classification: B05C,H01J

Abstract:
1. A fluid injection apparatus comprising: a fluid supply apparatus including a thread grooved shaft, a rotation transmission unit, and a suction port, said rotation transmission unit being operable to rotate said thread grooved shaft about a center axis of said thread grooved shaft, and said suction port being provided for introducing a fluid; and a piston portion including a piston, an axial driving unit, and a discharge port, said piston being disposed in a housing, said axial driving unit being operable to move said piston relative to said housing in an axial direction, and said discharge port being provided for discharging the fluid, wherein said fluid supply apparatus is connected to said piston portion through a flow passage, wherein a clearance is formed between said piston and a face opposing said piston, said face having a protruding portion, wherein a longitudinal axis of said thread grooved shaft is slanted with respect to a longitudinal axis of said piston, wherein said fluid supply apparatus is configured to supply a continuous flow of the fluid to said piston portion, wherein said piston portion is configured to convert the continuous flow to an intermittent flow by utilizing a pressure change caused by moving said piston in the axial direction during continuous injection, and wherein a discharge quantity of the intermittent flow is adjustable by adjusting a number of revolutions of said thread grooved shaft of said fluid supply apparatus.