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:
Feb. 08, 2000
Filed:
Nov. 23, 1994
Applicant:
Inventor:
Hideki Nakayoshi, Kariya, JP;
Assignee:
Aisin Seiki Kabushiki Kaisha, Aichi-pref, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16K / ;
U.S. Cl.
CPC ...
251 3002 ; 123 4149 ; 251 44 ; 25112908 ;
Abstract
An electromagnetically operable proportional pressure control device has a spool which is slidably housed in a cylindrical bore formed in a housing. A pressure chamber defined in the cylindrical bore communicates with an inlet port through a diametrically reduced bore and an outlet port through a return hole, a pilot valve and a return passage. The pressure difference produced between the inlet port and the pressure chamber causes the spool to move establishing a direct fluid communication of both ports. An oil flow from the inlet port into the pressure chamber is smaller than an oil flow from the pressure chamber to the return passage.