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:
Jul. 13, 1993
Filed:
Nov. 23, 1992
Issei Kanari, Kanagawa, JP;
Atsugi Unisia Corporation, , JP;
Abstract
A variable damping force shock absorber has a hollow cylinder, in which is disposed a thrusting piston for defining upper and lower fluid chambers. A fluid path is defined through the piston and a piston rod for establishing fluid communication between the upper and lower fluid chambers. A first flow restrictive orifice is provided in the fluid path which first flow restrictive orifice has variable flow restriction characteristics according to a first variation characteristic in relation to a piston stroke speed. A second flow restrictive orifice is also provided in the fluid path. The second flow restrictive orifice has a variable multitude flow restriction according to a second variation characteristic in relation to the piston stroke speed, which second variation characteristic is so determined as to establish, linear variation of damping force in relation to the piston stroke speed. A communication path is formed for establishing communication between the first and second flow restrictive orifices. The communication path has a first section extending radially and a second section extending axially and is defined between the piston rod and the piston.