Fluid sprinkling – spraying – and diffusing – Electrostatic type – With automatic safety feature
Reexamination Certificate
2005-04-12
2005-04-12
Nguyen, Dinh Q. (Department: 3752)
Fluid sprinkling, spraying, and diffusing
Electrostatic type
With automatic safety feature
C239S705000, C239S708000
Reexamination Certificate
active
06877681
ABSTRACT:
A modular spray gun that can be configured and built to operate using a selectable spray process. The modular spray gun includes a gun body, an extension and a selectable spray atomizing component. The basic gun body and extension are used to configure a spray gun that can operate as an air spray gun, an airless spray gun, an AAA gun or an HVLP spray gun. The modular extension can be selected to allow circulating or non-circulating operation. The modular extension also permits a variety of spray nozzle assemblies to be mounted thereon depending on the selected spray process to be used with the specific gun. The modular gun body allows selective connection of an atomizing air supply and additional components specific to a particular spray process. An indicator device and/or a relief valve is provided for spray guns using an HVLP spray process to provide an indication that the spray gun is in compliance with the maximum nozzle air pressure limit, usually less than 10 psi. A new air valve seal assembly is also provided. The modular gun design can accommodate electrostatic and non-electrostatic versions.
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Ronen Harari and Eran Sher “Optimization of a Plain-Jet Airblast Atomizer,” Atomization and Sprays, vol., 7, pp. 97-113,1997.
Ehrnschwender George C.
Hartle Ronald J.
Mancini David L.
Calfee Halter & Griswold LLP
Nguyen Dinh Q.
Nordson Corporation
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