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. 19, 2009
Filed:
Aug. 05, 2004
Norio Uemura, Tokyo, JP;
Toshiaki Iwa, Tokyo, JP;
Katsuya Shirai, Tokyo, JP;
Keigo Shirafuji, Tokyo, JP;
Yukihiko Taguchi, Gunma, JP;
Norio Uemura, Tokyo, JP;
Toshiaki Iwa, Tokyo, JP;
Katsuya Shirai, Tokyo, JP;
Keigo Shirafuji, Tokyo, JP;
Yukihiko Taguchi, Gunma, JP;
Eagle Industry Co., Ltd., Tokyo, JP;
Sanden Corporation, Gunma, JP;
Abstract
An operating rod is subjected to a surface hardening heat treatment without a post finishing process which enhances a responsiveness of the operating rod by preventing powders from being attracted to a sliding surface of the operating rod. The capacitive control valve includes a solenoid rod portion communicating with a moveable core of the solenoid portion, an operating rod connected with the solenoid rod portion, the operating rod including a valve body used for opening or closing a control fluid passage hole, and a fixed core arranged opposite relative to the moveable core. The fixed core includes a guide hole defined therein which guides the operating rod through the guide hole in a freely moveable manner, the operating rod extending longitudinally through an internal bore. The operating rod being subjected to surface hardening treatment at a relatively low temperature that does not exceed 500° C.