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Vacuum cleaner and method

  • US 5,659,918 A
  • Filed: 02/23/1996
  • Issued: 08/26/1997
  • Est. Priority Date: 02/23/1996
  • Status: Expired due to Term
First Claim
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1. A carpet vacuum cleaner comprising, in combination,a housing,a handle positioned at one end of the housing,a pair of wheels beneath and forward of the handle, said wheels being secured on flanking sides of the housing for rotation with regard to the housing,a recovery fluid tank,a cleaning fluid container positioned interiorly of the tank,means for dispensing cleaning fluid from the cleaning fluid container for cleaning, and a recovery fluid nozzle for returning recovery fluid to the tank, and positioned at the forward portion of the housing for engaging the carpet and applying a vacuum to the carpet,and a brush head assembly secured pivotally beneath the housing,said brush head assembly having a motor, a brush, and spray mechanism, in which the brush head assembly is pivotally secured to the housing resulting in a relatively constant weight on the brush while engaging the carpet,the mechanical components being positioned in a permanent location on the machine relative to each other such that combined they impart enough moment around the axle such that unit rests stable on the two wheels, the nozzle, and the brush,the cleaning fluid container and tank shapes being designed such that when either alone is being filled with fluid, the center of gravity of the fluid shifts in a direction away from the nozzle toward the axle as the cleaning fluid container or tank are filled with fluid.

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