Metal working – Method of mechanical manufacture – Valve or choke making
Reexamination Certificate
2004-07-08
2010-02-16
Bryant, David P (Department: 3726)
Metal working
Method of mechanical manufacture
Valve or choke making
C228S114500, C228S002300
Reexamination Certificate
active
07661193
ABSTRACT:
In a method for manufacturing a float valve apparatus including a valve case, an upper lid incorporated into this valve case to form a valve chamber, and a float valve liftably arranged inside the valve chamber, the upper lid being provided with a lead-out pipe connected to piping of the outside, an exhaust hole which communicates with this lead-out pipe and is opened in an inner surface of the upper lid, and a seal cap which is mounted so as to enclose this exhaust hole and forms a valve seat on which the float valve abuts, the seal cap is welded to an inner surface of the upper lid by spin welding.
REFERENCES:
patent: 3993519 (1976-11-01), Birkhold
patent: 5833127 (1998-11-01), Powell et al.
patent: 6422261 (2002-07-01), DeCapua et al.
patent: 5-30654 (1993-04-01), None
patent: 2000-154763 (2000-06-01), None
patent: 2002-332925 (2002-11-01), None
Japanese Office Action dated Dec. 9, 2008, with an English translation.
Afzali Sarang
Bryant David P
McGinn IP Law Group PLLC
Piolax Inc.
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