US Patent 7004199 Fluid control apparatus

Line interconnecting means interconnecting two lines adjacent to each other laterally thereof comprises a lateral projection 64b formed on a two-way connecting block coupling 64 of the first of the lines, a recessed portion 54c formed in a two-way connecting block coupling 64 of the second of the lines for the lateral projection 64b to fit in, a coupling branch channel 82 formed in the block coupling 64 provided with the lateral projection, a first valve body branch channel 90A formed in the body 54a of a shut-off valve 54 of the first line for always causing a main channel 89 in the valve body to communicate with the coupling body upper surface opening 82a of the coupling branch channel 82, and a second valve body branch channel 90B formed in the body 54a of a shut-off valve 54 of the second line for always causing a main channel 89 in the valve body to communicate with a lateral projection upper surface opening of the coupling branch channel 82.