The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 22, 2011
Filed:
Oct. 22, 2010
Tetsuyuki Sakamoto, Hachioji, JP;
Tetsuyuki Sakamoto, Hachioji, JP;
Olympus Corporation, Tokyo, JP;
Abstract
There is provided a linear drive ultrasonic motor of which, a size can be made small, and in which, it is possible to guide assuredly while reducing a transfer resistance and a frictional resistance of a driven member. A linear drive ultrasonic motor includes at least, an ultrasonic vibrator having a piezoelectric element, a driven member which is driven by a frictional force between the driven member and the ultrasonic vibrator, a pressing member which presses the ultrasonic vibrator such that a frictional force is generated between the ultrasonic vibrator and the driven member, a rolling member having a spherical shape, which makes a contact with the driven member, and a base member which movably supports the driven member via the rolling member, and the rolling member makes a contact with the driven member at a first contact point, and makes a contact with the base member at two second contact points, and lengths of two straight lines connecting the first contact point and two second contact points are substantially same.