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:
Nov. 10, 1998
Filed:
Dec. 29, 1995
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
The exhaust pipe of an engine has a double-wall structure consisting of an inner pipe and an outer pipe, and the inner pipe is spaced from the outer pipe with a predetermined clearance (heat insulating layer). The exhaust pipe includes a fitting for connecting other parts. At this fitting portion, the outer pipe has a outer hole. Likewise, the inner pipe has an inner hole. A nipple is situated on the outer pipe around the edge of the outer hole and is fixed to the outer pipe. An oxygen sensor is fitted to the nipple, and it extends through the inner hole of the inner pipe. A seal which is provided between the oxygen sensor and the flat portion of the inner pipe slidably contacts the step and the flat portion such that the fitting is unaffected by unequal thermal expansion between the inner and outer pipes.