ApplicationNo. 05/812447 filed on 07/05/1977
US Classes:318/116, NONMAGNETIC MOTOR310/20, Motion-converting mechanism310/26, Magnetostrictive310/322, Acoustic wave type generator or receiver310/334, Acoustic wave type generator or receiver60/721, MISCELLANEOUS73/570.5Acoustic levitation
ExaminersPrimary: Gill, James J.
Attorney, Agent or Firm
International ClassesG10K 15/00 (20060101)
H02N 11/00 (20060101)
AbstractSound waves are utilized to apply torque to a body in an enclosure of square cross section, by driving two transducers located on perpendicular walls of an enclosure, at the same frequency but at a predetermined phase difference such as 90°. The torque is a first order effect, so that large and controlled rotational speeds can be obtained.