"Chet" fired this volley in
et:

Hi Lloyd!
You bet I'm listening!!!!!
And I must confess to being a bit confused. Both ways seem to
have
the
potential to work correctly.
Guess I'll have to plan on making a couple and see which one
works
best! I'll let everyone know which one won the competition. ; -
)

No.. the way I drew it, it would only work under positive pressure.
Reversing the end the rod works through will allow it to work under
vacuum. Otherwise, when vacuum is applied (to the end I drew), the
sock would simply collapse inward.

LLoyd