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Self-propelled vacuum cleaner

  • US 4,249,281 A
  • Filed: 07/30/1979
  • Issued: 02/10/1981
  • Est. Priority Date: 07/30/1979
  • Status: Expired due to Term
First Claim
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1. In a ground treatment apparatus having a body portion with ground engaging wheels and a motor, and an enlongated handle pivoted to said body portion for manual manipulation of said apparatus, and wherein coupling means are provided for coupling said motor to said wheels, manually operable control means are provided on said handle, and linking means are provided for controlling said first coupling means in response to said control means;

  • the improvement wherein said coupling means comprises a common drive shaft for said wheels, first and second spaced apart gears having first and second drive faces respectively and being freely rotatably mounted on said shaft and coupled to said motor for continuous rotation in opposite rotational directions, and first and second clutch plates rotatable with said shaft and axially slidable thereon, said first and second clutch plates being positioned to be moved into and out of engagement with said first and second drive faces respectively, whereby only one of said faces can engage the respective clutch plates at any time and the clutch plates can be positioned at a neutral position with neither of them engaging its respective face, said linking means being a mechanical coupling and comprising means for selectively moving said clutch plates to engage said drive faces under the continuous control of said manually operable control means.

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