Two-level nozzles with integrated or built-in filters and method
AssigneeBowles Fluidics Corporation
InventorsDharapuram N. Srinath, Eric Koehler
Life of this patent
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Abstract
A molded fluidic device having a power nozzle with a width W and a coupling passage coupling a source of fluid to the power nozzle. The coupling passage is formed on one chip or insert surface and has a planar enlargement and a plurality of posts spaced across the enlargement, the spacing S between each post being less than the width of the power nozzle with the sum of spacing S being greater than the width W. A liquid spray nozzle is formed on an opposing chip surface and connected to the coupling passage downstream of the posts.
Claims4
A liquid spray device comprising:
- a fluidic circuit chip,
- a housing member having a chamber for sealingly receiving said fluidic circuit chip and an input port for coupling said chamber to a source of liquid under pressure,
- said chip having a first and second sides and an output end which is transverse to said first and second sides,
- said first side including a subchamber having upstream and downstream ends and a series of spaced posts forming a filter dividing the upstream end of said subchamber from the downstream end of said subchamber with said upstream end being in registry with said input port to receive liquid from said source of liquid,
- said second side including a fluidic circuit formed therein, said fluidic circuit having a power nozzle, there being a liquid flow path from said downstream end of said subchamber to said power nozzle, said fluidic circuit having an outlet throat and an outlet to ambient in said output end.
The method of constructing a liquid spray device, comprising in a single chip element, molding a filtered feed passage, and a liquid spray circuit in an opposing surface with a flow path through said single chip element, and forcing said single chip into sealing relation in a housing.
Dependencies are inferred from the claim text.