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. 28, 1998
Filed:
May. 28, 1997
Applicant:
Inventors:
Yukio Uchida, Kanagawa, JP;
Sachiko Nojyo, Kanagawa, JP;
Assignee:
Unisia JECS Corporation, Atsugi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G05D / ;
U.S. Cl.
CPC ...
1371151 ; 13711522 ;
Abstract
A fluid-flow control valve device comprises a control orifice being fluidly disposed upstream of the outlet passage for variably restricting a flow of working fluid from the inlet passage to the outlet passage, a valve spool slidably accommodated in the spool chamber and defining first and second pressure chambers, and a control spring disposed in the second pressure chamber for biasing the valve spool toward the first pressure chamber, and a spring-bias adjustment device for variably adjusting a set spring-bias of the control spring associated the valve spool in response to a change in the pressure in the outlet passage.