Stopper for reliable gas injection

Details Stopper for reliable gas injection Stopper for reliable gas injection

2007-04-03

2007-04-03

Kastler, Scott (Department: 1742)

Dispensing

Molten metal dispensing

Flow controllers or assists

C222S603000, C266S217000, C266S220000

Reexamination Certificate

active

10480329

ABSTRACT:
The present invention concerns a mono-block stopper adapted to deliver gas during pouring of molten metal comprising a stopper body having an internal chamber (1) and a gas discharge port (2), a bore (3) connecting the internal chamber (1) to the gas discharge port (2), calibrating means (4) being provided in the bore (3) to provide a restricted path. This stopper is characterised by the fact that the calibrating means comprise a rod (4) having at least one axially-extending gas passages therealong, the gas passage(s) having a section such as to offer a predetermined resistance to flow. The stopper of the invention is far more reliable and can be easily adapted to various operational parameters.

REFERENCES:
patent: 3200457 (1965-08-01), Wagstaff
patent: 4691901 (1987-09-01), Dobner
patent: 4706944 (1987-11-01), Lee
patent: 4899992 (1990-02-01), Thrower et al.
patent: 2787045 (1998-12-01), None
patent: 2254274 (1992-10-01), None
patent: 2263427 (1993-07-01), None

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