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:
Mar. 26, 2002
Filed:
Sep. 23, 1999
Yoko Suzuki, Chiba, JP;
Kazuo Tani, Chiba, JP;
Hidetaka Maeda, Chiba, JP;
Mizuaki Suzuki, Chiba, JP;
Seiko Instruments Inc., , JP;
Abstract
A fine drive unit comprises a suspension arm having a head portion and a support member supporting the suspension arm for undergoing pivotal movement. The support member has a coupling portion connected to the suspension arm, a spring portion connected to the coupling portion, at least one pair of bi-directional cantilevers, and piezoelectric members each disposed on a respective one of the cantilevers. When a voltage having a preselected frequency is applied to the piezoelectric members, the cantilevers are vibrated to cause the cantilevers to contact the suspension arm and thereby finely drive the head portion.