Ceramic valve seats
AssigneeNGK Insulators, Ltd.
InventorsIsao Oda, Yoshihiko Ishida
Life of this patent
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Abstract
A ceramic valve seat is disclosed herein. A face portion of the valve seat at which the valve seat is to contact with a valve is made of a ceramic material. At least edge portions of the valve-contacting face portion of the valve seat are rounded. By so constructing, impact force due to contact between the valve and the valve seat and stress concentration can be mitigated.
Claims12
A ceramic valve seat wherein at least a face at which the ceramic valve seat is to contact with a valve is made of a ceramic material and edge portions of the face of the valve seat at which the valve seat and the valve contact with each other are rounded.
Dependencies are inferred from the claim text.