Fluid handling – Processes – Cleaning – repairing – or assembling
Patent
1992-05-05
1993-05-25
Hepperle, Stephen M.
Fluid handling
Processes
Cleaning, repairing, or assembling
137510, F16K 31365
Patent
active
052131262
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.
Ono Tomohiro
Shirasaki Katsuya
Hepperle Stephen M.
Mitsuba Electric Manufacturing Co. Ltd.
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