Patent ID: 6926250

Claim:
A valve driving device comprising: a plurality of openings having an inflow pipe into which fluid flows and an outflow pipe from which fluid flows, the inflow pipe and outflow pipe forming a portion of a flow-path and being connected to an interior of the plurality of openings; a plurality of valve bodies, each of which is brought into tight contact with a peripheral edge of a corresponding one of the plurality of openings and is rotated to open or close the corresponding opening, thereby interrupting or permitting the flow of the fluid; and driving means for driving the plurality of valve bodies, the driving means including a common gear and a plurality of driven gears driven by the common gear, each of the plurality of driven gears corresponding to one of the plurality of valve bodies, wherein the plurality of valve bodies are formed separately from the plurality of driven gears and are held on axial end surfaces of the plurality of driven gears, and the plurality of driven gears rotate the plurality of valve bodies to open or close the fluid flow-path.