Scrubber vac-fan seal

  • US 5,943,730 A
  • Filed: 11/24/1997
  • Issued: 08/31/1999
  • Est. Priority Date: 11/24/1997
  • Status: Expired due to Term
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First Claim
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1. A surface maintenance machine including a body, wheels for supporting said body, a source of cleaning solution on said body, a first conduit for applying cleaning solution to a surface to be cleaned, scrub brushes carried by said body for scrubbing a surface to be cleaned, a squeegee carried by said body, a container for used cleaning solution on said body, a vacuum system including a vacuum fan assembly for removing used cleaning solution from adjacent the squeegee and conveying it to said container, said vacuum system including a second conduit between said container and said vacuum fan assembly, a seal extending about said second conduit and in contact with said container and vacuum fan assembly, with the exterior of said seal being exposed to atmospheric pressure and the interior of said seal being exposed to the less than atmospheric pressure of said vacuum system, said seal having connected annular lip portions, with the pressure difference between opposite sides of said seal moving said lip portions toward sealing contact with adjacent portions of said container and vacuum fan assembly.

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