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:
Feb. 12, 2008
Filed:
Jan. 13, 2003
Takahiro Nishinaka, Omihachiman, JP;
Hidekazu Yabuuchi, Hikone, JP;
Hiroki Inoue, Hikone, JP;
Tomio Yamada, Shiga, JP;
Takahiro Nishinaka, Omihachiman, JP;
Hidekazu Yabuuchi, Hikone, JP;
Hiroki Inoue, Hikone, JP;
Tomio Yamada, Shiga, JP;
Matsushita Electric Works, Ltd., Kadoma-shi, JP;
Abstract
An electric toothbrush includes a drive part, a driver, a brush part and a vibration-absorber. The drive part includes a drive shaft provided to be lineally movable and a brush part detachably attached to one end of the drive shaft. The driver is configured to apply reciprocal force to the drive shaft to reciprocally lineally move the drive shaft. The vibration-absorber is connected to the drive shaft via a second spring to be lineally movable along the drive shaft. A weight ratio of a weight of the vibration-absorber to a weight of the drive part is at least 0.9 and at most 1.1.