Here is a reference to "wing flow" at Richrad Binder's
Glossopedia:
with Wing Flow as a design and model by
Chilton:
Binder writes, "Chilton also developed a successful nib design, called the Wing-Flow, with “ears” that wrap around the feed to lock the two parts in alignment."
BUT
I'll add the (I believe much more likely) suspicion that "warranted wing flow" could also be a way of SOUNDING like "warranted" as in 14k, but it is actually only warranting that it is a wing flow . . .
This
link, (reply #9) argues for that suspicion:
Here is another
link (reply #6) arguing that nibs that say Wing-Flow USA are NOT Chilton and generally cheaper gold-plate nibs.
Anyway, looks kind of cool and enterprising. Looks like a piston filler, too.
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