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:
Aug. 05, 2025
Filed:
May. 04, 2023
Mitsubishi Heavy Industries, Ltd., Tokyo, JP;
Takashi Yokoyama, Tokyo, JP;
Fumiyuki Suzuki, Yokohama, JP;
MITSUBISHI HEAVY INDUSTRIES, LTD., Tokyo, JP;
Abstract
A steam valve including a valve seat and a valve body, each of which has: a first layer formed on a base material and made of a material different from the base material; and a second layer formed on the first layer in a contact position between the valve body and the valve seat and made of a material different from the base material and the first layer. On one side or the other side of a steam passage regarding at least one of the valve body or the valve seat, a minimum curvature radius of the first layer in a cross-section along a direction of relative movement between the valve body and the valve seat is equal to or larger than the smaller of a minimum curvature radius of a surface of the base material or a minimum curvature radius of a surface of the second layer.