Method for grinding rough-shaped objects to a clean spherical form Patent #: 4903439
ApplicationNo. 952076 filed on 09/28/1992
US Classes:451/115, Of valve and seat451/165, Ultrasonic451/430Valve or valve seat abrader
ExaminersPrimary: Rose, Robert A.
Attorney, Agent or Firm
Foreign Patent References
International ClassB24B 015/04
Foreign Application Priority Data1988-08-26 DE
AbstractAn apparatus for treating valves having a sealing seat embodied on a movable valve element and a valve seat face embodied on a valve seat body in such a way as to improve the surface quality of the sealing faces. The movable valve element is set into a rotational motion, with pressure applied thereto toward the valve seat body held in a fixed position. During the rotational motion of the valve element a vibrational motion of ultrasonic range high frequency, acting parallel to the axis of rotation, is superimposed upon the rotary motion. Simultaneously a fine-grained lapping medium is applied to the valve seat face. The apparatus is suitable for all valves having movable valve elements, the sealing seats of which cooperate with valve seat faces.