Patent ID: 8522923

Claim:
A fluid supply apparatus comprising: a main passage through which fluid flows; and a parallel passage section, which includes first and second passages connectable in parallel to the main passage, the parallel passage section including a selector valve, which is located between i) the main passage and ii) the first and second passages; wherein the selector valve includes: a first inlet passage and a second inlet passage, which communicate with the main passage; a first outlet passage, which communicates with the first passage; a second outlet passage, which communicates with the second passage; a constriction provided in the second inlet passage; and a valve body, which selectively switches an operating state of the selector valve between a first state and a second state, wherein, when the operating state of the selector valve is in the first state, the first inlet passage communicates with the first outlet passage so that the fluid flows from the main passage to the first passage through the first inlet passage and the first outlet passage and wherein, when the operating state of the selector valve is in the second state, the second inlet passage communicates with both the first and second outlet passages so that the fluid flows from the main passage to both the first and second passages through the second inlet passage and the first and second outlet passages, wherein the constriction suppresses decrease in a pressure loss at the parallel passage section associated with change in the operating state of the selector valve from the first state to the second state.