Pressure control valve and method of manufacturing same

Details Pressure control valve and method of manufacturing same Pressure control valve and method of manufacturing same

Filed on

1992-05-05

Date issued

1993-05-25

Examiner

Hepperle, Stephen M.

Patent Class

Fluid handling

SubClass

Processes

SubSubClass

Cleaning, repairing, or assembling

Other Related Categories

137510, F16K 31365

Type

Patent

Status

active

Patent number

052131262

Description

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.

REFERENCES:
patent: 4606367 (1986-08-01), Britt
patent: 4936342 (1990-06-01), Kojima et al.

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