Ultrasonic motor having a vibratory body and method of producing the same

A method of preparing a vibratory body of a vibration motor from an annular body, the method comprising:

• moving a groove forming member with first and second groove cutting members in a straight line in a radial direction of the annular body from a first outer periphery side through a center portion of the annular body to a second outer periphery side opposite the first outer periphery side, to form a first groove group having first and second grooves parallel to one another in a top surface of the annular body;
• and
• rotating the annular body a predetermined angle to prepare the annular body for formation of a second groove group.

A method of preparing a vibratory body of a vibration motor from an annular body, the method comprising:

• rotating first and second circular groove cutting members of a groove forming member, the first and second groove cutting members being parallel to one another;
• and
• moving the groove forming member in a radial direction of the annular body to simultaneously form first and second grooves parallel to one another in a top surface of the annular body.

A method of preparing a vibratory body of a vibration motor from an annular body, the method comprising:

• moving a groove forming member with first and second groove cutting members in a radial direction of the annular body to form a first groove group having first and second grooves, parallel to one another and having rectangular cross-sections, in a top surface of the annular body;
• and
• rotating the annular body a predetermined angle to prepare the annular body for formation of a second groove group.

A method of preparing a vibratory body of a vibration motor from an annular body, the method comprising:

• moving a groove forming member with first and second groove cutting members in a straight line in a radial direction of the annular body from a first outer periphery side through a center portion of the annular body to a second outer periphery side opposite the first outer periphery side, to form a first groove group having first and second grooves, parallel to one another and having rectangular cross-sections, in a top surface of the annular body;
• and
• rotating the annular body a predetermined angle to prepare the annular body for formation of a second groove group.

A method of preparing a vibratory body of a vibration motor from an annular body, the method comprising:

• moving a groove forming member with first and second groove cutting members in a radial direction of the annular body to form a first groove group having first and second grooves with surfaces parallel to one another in a top surface of the annular body;
• and
• rotating the annular body a predetermined angle to prepare the annular body for formation of a second groove group.

A method of preparing a vibratory body of an ultrasonic motor from a linear body, the method comprising:

• moving a groove forming member with first and second groove cutting members in a linear direction perpendicular to a feed direction of the linear body to form a first groove group having first and second grooves with sides parallel to one another in a top surface of the linear body, wherein the first and second grooves are formed rectilinearly in the top surface of the linear body;
• and
• moving the linear body in the feed direction to prepare the linear body for formation of a second groove group.