Method for manufacturing a valve spindle
US9616498B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 11, 2014 |
| Grant date | Apr 11, 2017 |
| Priority date | — |
| Expiry date | Apr 13, 2034 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01L3/00
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.