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:
May. 05, 1987
Filed:
May. 14, 1986
Yoshiro Hayashi, Toyota, JP;
Yoshio Ekino, Toyota, JP;
Isamu Yuki, Toyota, JP;
Masahiro Taguchi, Toyota, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
A durable protective tube for a thermocouple having an extended serviceable life is obtained by covering a tubular preform of ceramic material with a refractory coating. The refractory coating is an alternate arrangement of one or more fine refractory layers of fine particulate refractory material having a particle size of 150 mesh to 500 mesh and one or more coarse refractory layers of coarse particulate refractory material having a particle size of 0.1 mm to 2.0 mm. The refractory coating is prepared by alternately applying a slurry of fine refractory particulates in a colloidal silica or ethyl silicate hydrolyzate binder and then coarse refractory particulates on the outer surface of the tubular preform followed by optional sintering.