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. 29, 2003
Filed:
Oct. 25, 2001
Masatoshi Hada, Nagoya, JP;
Yasuo Sunaga, Koga, JP;
Other;
Abstract
An air-intake manifold includes a plurality of air-intake pipes connecting between a collector and an air-intake pipe mount. Each air-intake pipe is bent to have a predetermined shape. Each air-intake pipe is fabricated by bending a substantially straight double metal pipe that has an outer pipe and an inner pipe with a clearance therebetween equal to or less than 0.2 mm, such that the outer pipe and the inner pipe locally contact with each other at an intermediate region. Accordingly, while the outer pipe and the inner pipe of the air-intake pipe locally contact with each other at the contact point (in the relatively slidable relationship), an air layer having a thickness equal to or less than about 0.2 mm is formed between the outer pipe and the inner pipe at portions except for the contact point