Fluid sprinkling – spraying – and diffusing – With cleaning means – drip collecting – waste disposal or soil... – Nozzle cleaner – flusher or drainer
Reexamination Certificate
2007-04-13
2008-09-23
Tran, Len (Department: 3752)
Fluid sprinkling, spraying, and diffusing
With cleaning means, drip collecting, waste disposal or soil...
Nozzle cleaner, flusher or drainer
C239S104000, C239S111000, C239S597000, C239S707000, C137S217000
Reexamination Certificate
active
07427037
ABSTRACT:
A showerhead facilitating draining of water retained following shut-off. The showerhead includes a housing swivelably fitted on a ball-adapter which in turn includes an integral threaded segment for attachment to a water feed line. An air pathway is formed to extend from inside to outside the ball-adapter where it opens to generally atmospheric pressure. A flexible check valve in the form of an annular skirt is retained by an integral ring portion where the ball-adapter is threaded to the feed line. Under water-flow pressure, the skirt expands, blocking the passage. Upon shut-off, the skirt withdraws, instantly opening the air passage. Opening the showerhead to atmospheric pressure relieves the normally occurring suction effect which keeps water from draining completely from the showerhead spray holes. Thus avoiding the widespread problem of trapped water slowly evaporating and leaving behind stubborn and unsightly mineral deposits that eventually build up to clog showerhead spray holes.
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Hogan James S
Kelly Donald Grant
Tran Len
LandOfFree
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