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Vacuum cleaning

  • US 4,219,902 A
  • Filed: 02/09/1979
  • Issued: 09/02/1980
  • Est. Priority Date: 02/09/1979
  • Status: Expired due to Term
First Claim
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1. For use in a vacuum type floor cleaner having means to provide a suction flow of air, a lower head unit comprising:

  • (a) a housing having front and rear walls joined by side walls,(b) means on said housing forming a vacuum inlet chamber,(c) a transversely extending rotary brush disposed in said chamber,(d) means to drive said rotary brush so that dirt and similar material on the floor are loosened thereby and sucked into said chamber by the flowing air,(e) downwardly inclined stationary brush means fixedly attached on each side of said housing and extending transversely outwardly therefrom for engagement with the floor for loosening said material as said floor cleaner is translated over the floor so that said latter loosened material is sucked into said chamber,(f) and a transverse slot disposed in said housing adjacent each said brush means and communicating between the outside of said housing and said chamber so that material loosened by said brush means is drawn by the air flow through the slot and into said chamber,(g) each said transverse slot being disposed forwardly of its respective brush means and communicates with the forward part of said chamber adjacent said rotary brush so that material drawn through said slot is brought into engagement with said rotary brush.

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