Fluid sprinkling – spraying – and diffusing – Including valve means in flow line – Serially arranged valves
Reexamination Certificate
2007-03-20
2007-03-20
Shaver, Kevin (Department: 3752)
Fluid sprinkling, spraying, and diffusing
Including valve means in flow line
Serially arranged valves
C239S569000, C239S310000, C239S337000, C239S373000, C137S218000
Reexamination Certificate
active
10785539
ABSTRACT:
The invention comprises, in one form thereof, a sprayer apparatus that includes a disengageable pressurized fluid source, a pressure chamber in fluid communication with the fluid source, a backflow valve, a sealed vessel, and a sprayer outlet. The backflow valve has two one-way valves separated by a weep mechanism and is positioned between the fluid source and the pressure chamber such that the two one-way valves allow fluid flow from the fluid source to the pressure chamber. The sealed vessel is in fluid communication with the pressure chamber. The sprayer outlet includes a shutoff valve in fluid communication with the pressure chamber. The shutoff valve normally prevents fluid flow from the pressure chamber to the sprayer outlet and is operable to allow fluid flow from the pressure tank to the sprayer outlet.
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Robert H. Wilkenson and Julie Stachecki, Project Your Water Supply From Agricultural Chemical Backflow, Feb. 1993, 12 pages, http://www.ag.uiuc.edu/˜vista/html—pubs/back/back.htm.
Byron David
Odessa Ronald M.
Chapin Manufacturing, Inc.
Gorman Darren
Lukacher Kenneth J.
Shaver Kevin
LandOfFree
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