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:
Jan. 23, 1990
Filed:
Dec. 28, 1988
Tetsuo Kato, Kanagawa, JP;
Tokico Ltd., Kanagawa, JP;
Abstract
A hydraulic shock absorber has a disk valve assembly which is formed by successively stacking up a first disk valve having arc-shaped or circumferentially extending opening provided therein at positions close to the inner periphery thereof, a second disk valve having notches which extend from the outer periphery thereof to the radially outer edges of the corresponding openings provided in the first disk valve, and a predetermined number of annular third disk valves. A respective such disk valve assembly is provided at the downstream end of each of the extension- and contraction-side passages which are formed in a piston. Thus, it is possible to obtain a higher level of damping force in a low piston speed region than in the case of a conventional valve mechanism that uses a fixed orifice, and damping characteristics can be set as desired.