Patent ID: 7661193
Filing Date: 2010-02-16
Classification: B29C,B29L,F16K,Y10T

Abstract:
1. A method of manufacturing a float valve apparatus which includes a valve case, an upper lid attached to the valve case to define a valve chamber, and a float valve liftably arranged under the valve chamber, the method comprising: forming an exhaust hole, which communicates with a lead-out pipe of the upper lid, in an inner surface of the upper lid; inserting a seal cap, provided separately from the upper lid, to the upper lid such that the seal cap surrounds the exhaust hole and has a valve seat on which the float valve abuts; spin-welding the seal cap to the upper lid; and providing the valve case on the upper lid so that the seal cap, spin-welded on the inner surface of the upper lid, is enclosed within the valve chamber, wherein the seal cap is spin-welded to the upper lid before the valve case is provided.