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:
May. 31, 1994
Filed:
Apr. 08, 1993
Fumiyuki Yamaoka, Kanagawa, JP;
Atsugi Motor Parts Company Ltd., Atsugi, JP;
Abstract
A hydraulic shock absorber includes a hollow cylinder which defines therein a fluid chamber filled with a working fluid, and a piston which is reciprocally disposed within the fluid chamber and divides the fluid chamber into upper and lower chambers. The piston is formed with fluid passages for establishing fluid communication between the upper and lower chambers. Each of the fluid passages is controlled by a disk valve assembly comprising a plurality of elastic disk plates, so as to introduce the working fluid from one of the upper and lower chambers to the other chamber when fluid pressure in one of the chambers is greater than a predetermined value. The disk valve assembly has a bypassing fluid passage which has a plurality orifices configured so as to gradually decrease fluid pressure and flow velocity of the working fluid passing therethrough.