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:
Jul. 22, 1997
Filed:
Jul. 20, 1994
Shuhei Adachi, Iwata, JP;
Junichi Inami, Iwata, JP;
Abstract
A method for affixing a valve seat insert into a cylinder head recess using pressure or pressure in conjunction with resistance welding. The preferred method avoids the creation of tensile stresses within the valve seat insert during installation into the cylinder head. Further, the method reduces the size of an opening of the valve seat insert during installation. In addition, the application of pressure and the respective shapes of the recess and valve seat insert are such that a moment is not created in the insert which would result in the application of tensile forces on the insert. A lower surface opposite the combustion chamber of the valve seat insert is disposed at an angle to the opening within a range of .+-.15.degree. to a plane which is perpendicular to the axis of the opening. Additionally, the valve seat insert may comprise multiple components which, when resistance welded to the cylinder head, form a plurality of intermetallic layers having gradually varying coefficients of thermal expansion.