Patent ID: 8794123

Claim:
A double valve comprising: a first unitary valve assembly including a first outlet port, a second outlet port, and a first spool; a second unitary valve assembly including another first outlet port, another second outlet port and a second spool; a first pilot assembly coupled to the first unitary valve assembly; a second pilot assembly coupled to the second unitary valve assembly; a plate coupled to the first unitary valve assembly and the second unitary valve assembly, the plate including respective passages to provide a first common outlet passage coupled to the first outlet port and the another first outlet port and a second common outlet passage coupled to the second outlet port and the another second outlet port; and an inlet passage, wherein the first position is an initial position and the second position is an actuated position, and the fluid enters the double valve through the inlet passage, wherein the fluid exits the double valve through the first common outlet passage when the first spool and the second spool are in the initial position, and the fluid exits the double valve through the second common outlet passage when the first spool and the second spool are in the actuated position wherein when the first spool and the second spool are in a first position, fluid flows through the first common outlet passage, and when the first spool and the second spool are in a second position, the fluid flows through the second common outlet passage, and wherein, when one of the first spool and the second spool is in the initial position and the other of the first spool and the second spool is in the actuated position, the double valve malfunctions, and the fluid does not flow through either the first common outlet passage or the second common outlet passage.