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Method of making flow monitoring line strainer having flow indicating element

  • US 5,820,715 A
  • Filed: 09/15/1997
  • Issued: 10/13/1998
  • Est. Priority Date: 02/01/1996
  • Status: Expired due to Fees
First Claim
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1. A method of fabricating a fluid flow line strainer comprising the steps of:

  • forming an axially elongated housing element having substantially transparent walls and a flow channel therethrough along an axis between a flow inlet end and a flow exit end, said flow channel including first and second chambers separated by a flow restrictive passage;

    positioning a flow screen within said first chamber to screen substantially all fluid flow along said flow channel;

    positioning a resiliently biased flow resistance within said second chamber, said resistance having a substantially stabilized position within said second chamber corresponding to a distinctive fluid flow rate along said flow channel; and

    fusing an end cap to each end of the housing element, the end caps each having a step landing structure for directing sonic welding energy, the fusing comprising sonic welding.

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