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:
Apr. 08, 2008
Filed:
Nov. 05, 2004
Yasuhiko Seto, Odawara, JP;
Masayuki Nishiyama, Chigasaki, JP;
Yasuhiko Seto, Odawara, JP;
Masayuki Nishiyama, Chigasaki, JP;
NIFCO Inc., Yokohama, JP;
Abstract
A damper device includes a housing; a viscous fluid filled inside the housing; a rotor rotatably disposed inside the housing; and a sealing member for preventing the viscous fluid from leaking through the rotor and the housing. A rotational wing with a viscous-fluid passage is provided on one of the housing and the rotor. The rotational wing moves relative to the viscous fluid in a circumferential direction, and extends in a radial direction for dividing a housing portion of the housing filled with the viscous fluid. A valve is provided on the rotational wing, and is formed of an elastic member capable of deforming elastically. The valve opens the viscous-fluid passage when the rotor rotates in one direction, and blocks the viscous-fluid passage when the rotor rotates in the other direction.