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Closed-loop dual-cycle printed circuit board cleaning apparatus and method

  • US 5,201,958 A
  • Filed: 11/12/1991
  • Issued: 04/13/1993
  • Est. Priority Date: 11/12/1991
  • Status: Expired due to Term
First Claim
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1. An apparatus for cleaning electronic assemblies comprising:

  • a tank for receiving the assemblies for cleaning,a first fluid source in communication with the tank for filling the tank with a first cleaning fluid to immerse the assemblies,a first fluid drain aperture defined in the tank for draining the first cleaning fluid from the tank,a second fluid source in communication with the tank for filling the tank with a second cleaning fluid to immerse the assemblies,a second fluid drain aperture separate from the first fluid drain aperture, and defined in the tank for draining the second cleaning fluid from the tank,a first fluid drain conduit in communication with the tank at the first fluid drain aperture,a second fluid drain conduit in communication with the tank at the second fluid drain aperture,shutoff means for preventing the first fluid from entering the second conduit and the second fluid from entering the first conduit, andan ultrasonic generator operably connected to the tank for transmitting ultrasonic energy through the fluid therein to facilitate cleaning the assemblies.

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