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:
Apr. 04, 1995
Filed:
Jul. 19, 1993
Kazunori Takikawa, Numazu, JP;
Tadahiro Uematsu, Numazu, JP;
Abstract
Herein disclosed is a high-pressure fuel injection tube structure comprising: an injection tube body having a joint head at its one end; and a cap collar having a through hole generally at its center and such a sectional shape as to cover the joint head of the injection tube and made of a highly strong and corrosion-resistant metal material. Also disclosed is a method of manufacturing the high-pressure fuel injection tube structure. The cap collar is formed at the circumferential edge of the through hole thereof with a raised pawl wall retained on the circumferential of the communication hole of the injection tube body. The cap collar is formed with an inward flange at the end of its outer circumference. The highly corrosion-resistant metal material is one selected from the group consisting of stainless steel, inconel, hastelloy and titanium. The injection tube body has a double tube structure composed of a thicker outer tube member of steel and a thinner inner tube member of stainless steel or inconel. The joint head has a frusto-conical, arcuate or diamond shape outward of the axis of the injection tube body.