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:
Oct. 02, 2007
Filed:
Jul. 14, 2003
Eiji Fukuzawa, Kitakyushu, JP;
Takayuki Tomura, Miyako-gun, JP;
Naohisa Tanaka, Miyako-gun, JP;
Ryosuke Hayashi, Kitakyushu, JP;
Seiichiro Inoue, Kitakyushu, JP;
Yoshiro Terada, Kitakyushu, JP;
Satoshi Kato, Kitakyushu, JP;
Eiji Fukuzawa, Kitakyushu, JP;
Takayuki Tomura, Miyako-gun, JP;
Naohisa Tanaka, Miyako-gun, JP;
Ryosuke Hayashi, Kitakyushu, JP;
Seiichiro Inoue, Kitakyushu, JP;
Yoshiro Terada, Kitakyushu, JP;
Satoshi Kato, Kitakyushu, JP;
Toto Ltd., Fukuoka, JP;
Abstract
A damper device includes a check valve operated to apply braking force to a rotary shaft having wing portions when rotated in a cylinder in one direction and, when the rotary shaft is rotated in the opposite direction, the check valve is not operated. Movement restricting flow passages for restricting the movement of a viscous fluid between front and rear-side oil chambers divided by the wing portions are formed between an inner wall of the cylinder and the wing portions, and a selective communication passage having the check valve is formed between the wing portions and one of two side walls forming the oil chambers, such that the side wall and the check valve can be rotated along with the rotation of the wing portions, thereby avoiding rotation of the check valve in contact with the inner wall of the cylinder, for pronged service life of the damper device.