Fluid sprinkling – spraying – and diffusing – Processes – Including mixing or combining with air – gas or steam
Reexamination Certificate
2007-12-25
2007-12-25
Nguyen, Dinh Q. (Department: 3752)
Fluid sprinkling, spraying, and diffusing
Processes
Including mixing or combining with air, gas or steam
C239S303000, C239S304000, C239S320000, C239S414000, C222S140000, C222S370000, C222S410000, C366S168200, C366S280000
Reexamination Certificate
active
10900340
ABSTRACT:
A liquid reservoir of a hand-held, air-assisted spray apparatus is characterized by a plurality (i.e., two or more) of liquid-holding compartments. Each liquid-holding compartment is connected through an outlet port into fluid communication with the flow channel of the hand-held spraying apparatus.The liquid-holding compartments are isolated from fluid communication with each other such that a liquid introduced into one of the compartments is held apart from a liquid introduced into the other compartment.A rotatable element is associated with each liquid-holding compartment. Each rotatable element has a predetermined displacement. The rotatable elements are coupled together for rotation by a common shaft, so that, in use, the relative volumes of liquids dispensed from the respective liquid-holding compartments into the flow channel remain in a predetermined ratio regardless of the rate at which the liquids flow from their respective compartments. The component formulations of a multi-component coating such as that based on hydroxyl/isocyanate chemistry for automotive clearcoats are kept isolated until the actual time of application.
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E.I. du Pont de Nemours and Company
Nguyen Dinh Q.
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