Pressure control valve and method of manufacturing same
US5213126A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 5, 1992 |
| Grant date | May 25, 1993 |
| Priority date | — |
| Expiry date | May 5, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7836
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
In a method of manufacturing a pressure control valve wherein a fuel introduction path and a fuel discharge path are formed on a housing, a spherical valve body mounting portion is formed in the fuel discharge path and a spherical valve body is mounted on the valve body mounting portion, the spherical valve body itself is used as a jig for forming a valve seat surface, a pushing force is applied to the spherical valve body mounted on the spherical valve body mounting portion to punch it to form a valve seat surface having a concave spherical surface meeting a convex spherical surface of the spherical valve body is formed on a wall surface of the housing produced by aluminium die cast. An annular stepped portion is formed on the boundary between a valve seat surface of the spherical valve body mounting portion and a valve spring mounting portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.