A system for closely controlling the standoff distance of a nozzle in a remotely controlled fluid jet abrasive cutting system. The system comprises a head assembly having a support section and a nozzle body. Control means move the head assembly along a desired cutting path relative to the workpiece....http://www.google.es/patents/US4848042?utm_source=gb-gplus-sharePatente US4848042 - Fluid jet cutting system with standoff control
