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SELF-PROPELLED UPRIGHT VACUUM CLEANER

  • US 3,854,164 A
  • Filed: 01/15/1973
  • Issued: 12/17/1974
  • Est. Priority Date: 01/15/1973
  • Status: Expired due to Term
First Claim
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1. In a vacuum cleaner having means forming a dirt collecting chamber, a selectively positionable handle attached to said means forming a dirt collecting chamber for controlling movement of the vacuum cleaner selectively forwardly and rearwardly over a surface to be vacuum cleaned, an air conducting nozzle in communication with said dirt collecting chamber, and air moving means including first motor means for moving air through said nozzle to become dirt laden and moving said dirt laden air to said dirt collecting chamber means for removing the dirt therefrom, propelling means comprising:

  • drive wheel means mounted on said vacuum cleaner nozzle for engaging the surface to be cleaned;

    second motor means carried by said vacuum cleaner nozzle and drivingly connected to said drive wheel means; and

    means for selectively controlling said second motor means for reversibly driving said drive wheel means forwardly and rearwardly in response to selective positioning of said handle, said air moving means including means for conducting cooling air other than the dirt laden air in heat transfer association with said second motor means for cooling said second motor means.

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