Fluid handling – Processes – Cleaning – repairing – or assembling
Reexamination Certificate
2005-08-12
2009-02-17
Lee, Kevin L (Department: 3753)
Fluid handling
Processes
Cleaning, repairing, or assembling
C137S315010, C137S315180, C264S250000
Reexamination Certificate
active
07490621
ABSTRACT:
A method for producing a tapping valve formed as a plastic injection-molded part for plastic or metal shipping and storage tanks for liquids, wherein, in a first process step, the screw cap for screwing the valve onto the outlet connection of a liquid tank is produced in a first injection mold, the screw cap is then placed in a second injection mold, and in a second process step, the valve body is produced in the second injection mold in such a way that the inlet connection of the valve body passes through the opening of the ring shoulder and the threaded hole of the screw cap with clearance, and the collar of the inlet connection of the valve body is located inside the screw cap. In a second method, the valve body and its inlet connection are injection-molded as separate parts in a first process step, and in a second process step, the inlet connection, with a screw cap slipped onto it, is welded onto the valve body.
REFERENCES:
patent: 5551467 (1996-09-01), Booth et al.
patent: 103 01 517 (2004-03-01), None
Kueffner Friedrich
Lee Kevin L
Protechna S.A.
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