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:
Dec. 16, 1997
Filed:
Feb. 16, 1995
Applicant:
Inventor:
Yoshimi Ogihara, Toyohashi, JP;
Assignee:
Nippondenso Co., Ltd., , JP;
Primary Examiner:
Int. Cl.
CPC ...
B23P / ;
U.S. Cl.
CPC ...
29890142 ; 29890124 ; 29890128 ; 29890132 ;
Abstract
A fluid injection valve in which an orifice plate is produced by defining surfaces of walls forming an orifice on a plate-like basic material by pressing with a punch, forming a protective layer on a surface of the basic material, grinding a surface of the basic material to form an opening portion of the orifice at a predetermined opening value by measuring an amount of light passing through the orifice, and removing the protective layer in a tank filled with weak hydrochloric acid. It is possible to manufacture a fluid injection valve which has excellent fluid injection characteristics and injection quantity adjustment easily and with less expense.