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:
Sep. 12, 2000
Filed:
Nov. 30, 1998
Applicant:
Inventors:
Seiichiro Takeshita, Tsuchiura, JP;
Eiichi Kojima, Yokohama, JP;
Assignee:
Hitachi Construction Machinery Co., LTD, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F04B / ; F16L / ;
U.S. Cl.
CPC ...
417543 ; 13756534 ; 138 26 ;
Abstract
A ripple reducing device of the present invention for reducing ripple of oil flowing through a hydraulic line includes a closed line that diverges from the hydraulic line and is closed at a terminal end thereof, and at least one restrictor that divided the interior of the closed line into a plurality of sections, between a branch point at which the closed line diverges from the hydraulic line, and the terminal end of the closed line.