An ultrasonic transducer probe having a mechanically steerable acoustic element includes a linear motor having a stationary magnet assembly and a coil bidirectionally linearly movable with respect to the magnet assembly. A mechanical arrangement formed of a pair of spaced apart, rotatably mounted pulleys...http://www.google.es/patents/US4757818?utm_source=gb-gplus-sharePatente US4757818 - Ultrasonic transducer probe with linear motion drive mechanism
Ultrasonic transducer probe with linear motion drive mechanism
