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:
Apr. 11, 2017
Filed:
Mar. 11, 2014
Sandvik Intellectual Property Ab, Sandviken, SE;
Tomas Berglund, Falun, SE;
SANDVIK INTELLECTUAL PROPERTY AB, Sandviken, SE;
Abstract
A method for manufacturing a valve spindle having a valve disc and a valve stem, the method comprising the steps of: providing a capsule, which defines at least a portion of the valve disc; arranging, in the capsule, a preformed core body that includes a core head, which constitutes an inner portion of the valve disc; arranging a preformed annular valve seat in the capsule, wherein the valve seat is arranged such that the inner circumferential side of the valve seat at least partially defines an inner space around the core head; filling the inner space with a first metallic material, forming the buffer layer, such that the core head is covered with the first material; filling the capsule with a second metallic material, forming the cladding layer; subjecting the capsule to Hot Isostatic Pressing (HIP) at a predetermined temperature, a predetermined isostatic pressure and for a predetermined time so that the preformed core body, the buffer layer, the cladding layer and the valve seat are bonded metallurgically.