Nozzles with integrated or built-in filters and method

  • US 6,186,409 B1
  • Filed: 12/09/1999
  • Issued: 02/13/2001
  • Est. Priority Date: 12/10/1998
  • Status: Expired due to Term
First Claim
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1. In a molded fluidic spray device having a power nozzle with a width W and a coupling passage coupling a source of liquid under pressure to said power nozzle, the improvement wherein said fluidic device includes a molded fluidic circuit and a housing having a cavity into which said molded fluidic circuit is forcibly inserted and wherein said coupling passage has an enlargement and a plurality of posts spaced across said enlargement, the spacing S between each post being less than the width of said power nozzle with the sum of spacing S being substantially greater than said width W and wherein said enlargement is planar and the dimensions of said coupling passage, said planar enlargement and said spacing S are such that the fluid flow rate from said source to said power nozzle is substantially unaffected when one or more foreign particles block any one or more of said spaces between said posts.

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