US Patent 7726337 Shut-off and reversing valve

A disk-type valve encompasses both throughput control and a distribution function for distributing water through the valve to one of several outlets. A movable control disk for throughput control is actuated independently of a movable control disk for output selection. Both separately actuated controls cooperate with a joint stationary distribution disk and pressure forcing the movable control disks against the distribution disk can be adjusted and regulated separately. Two actuating elements are disposed around one another as a shaft and sleeve, for actuating the control disks independently.