A Novel Fault Tolerant High Precision Roto-Translating Spool Valve

A Roto-Translating valve of the spool type is described, focusing both on design and control characteristics. The new patented design is realized assembling a spool to a sleeve, the two parts are moved by two independent actuators and are placed to into the valve body. The valve can realize both basic logic functions (AND, OR), both advanced control techniques, moreover in term of safety it offers a fail operational characteristic, in reason of an operational redundancy and functional diversity. A remarkable enhancement of speed and precision is achieved by the use of two concurrent actuators, moreover the flexibility allow to get rid of the need of a specific spool design for each different application.