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Generator system for a vacuum cleaner

  • US 5,572,767 A
  • Filed: 07/25/1994
  • Issued: 11/12/1996
  • Est. Priority Date: 07/26/1993
  • Status: Expired due to Fees
First Claim
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1. A vacuum cleaner comprising:

  • a suction hose section;

    a motor for producing suction in the suction hose section;

    a suction pipe defining an air passing path, a first opening at one end of the air passing path, and a second opening at an opposite end of the air passing such that the air passing path commmunicates with the suction hose section through the second opening, whereby suction produced in the suction hose section by the motor pulls air into the air passing path through the first opening, along the air passing path to the second opening, and out of the air passing path into the suction hose section through the second opening;

    a rotatable runner provided in the air passing path, the runner being rotated by air flow along the air passing path;

    an electric generator coupled to the runner such that the generator generates a voltage in response to rotation of the runner; and

    a control valve provided in the air passing path, the control valve being arranged to move to close the air passing path when the suction produced in the suction hose section by the motor increases beyond a predetermined suction, and to move to open the air passing path when the suction produced in the suction hose section by the motor decreases below the predetermined suction.

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