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:
Mar. 22, 1988
Filed:
Jun. 23, 1986
Hiroshi Kondo, Takahama, JP;
Yukihisa Takeuchi, Aichi, JP;
Hitoshi Yoshida, Okazaki, JP;
Seiki Nakagawa, Takahama, JP;
Nippondenso Co., Ltd., Kariya, JP;
Abstract
A sintered ceramic structure for cleaning noxious substances contained in the exhaust gases emitted by an internal combustion engine is disclosed. The stucture comprises: an exhaust-gas cleaning portion including a multiplicity of pores through which the exhaust gas is discharged and an exhaust-gas inlet portion and an exhaust-gas outlet portion; an external wall portion being integrally disposed around the outer periphery of the exhaust-gas cleaning portion except for both the exhaust-gas inlet portion and the exhaust-gas outlet portion of the exhaust-gas cleaning portion; the exhaust-gas cleaning portion and the external wall portion being constituted by ceramics; and the ceramics of the external wall portion being composed of a sintered ceramic material having a sintering-shrinkage ratio smaller than that of the ceramics of the sintered ceramic material of the noxious gas cleaning portion, whereby upon sintering a residual compressive stress is imparted to the external wall portion due to the difference between the sintered-shrinkage ratios.