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. 25, 2008
Filed:
Dec. 13, 2004
Katsuyasu Tomiji, Kamakura, JP;
Katsuyasu Tomiji, Kamakura, JP;
NIFCO Inc., Yokohama, JP;
Abstract
A damper includes a piston with an orifice communicating in an axial direction and dividing a cylinder into two portions in the axial direction, and provides a braking force by resistance of a viscous fluid passing through the orifice when the piston moves inside the cylinder. The piston includes an inner member and an outer member movable in the inner member in the axial direction, which are loosely fitted with a gap for passing the viscous fluid. The inner and outer members are elastically urged with a spring in a direction wherein the inner and outer members are spaced. As the inner member moves to the outer member faster, the gap becomes narrower.