Indicator device for a vacuum cleaner dust container which has an additional pressure controller

  • US 5,778,486 A
  • Filed: 10/28/1996
  • Issued: 07/14/1998
  • Est. Priority Date: 10/31/1995
  • Status: Expired due to Fees
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First Claim
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1. An indicator device for visually in detail denoting an amount of filled dust in a dust container of a vacuum cleaner comprising:

  • a transparent first cylinder including an indicating means for denoting the amount of the filled dust and a first adjusting cap assembly installed to one end thereof for adjusting an operating time of the indicating means by controlling a flowing area of a first air under an atmospheric pressure, and including a first supporting means for elastically supporting said indicating means, said indicating means being slidably positioned in said transparent first cylinder so as to primarily decrease a vacuum degree in a dust collecting compartment and continuously displays an amount of filled dust in the dust container;

    a second cylinder including a second cap assembly installed to one end thereof for controlling a flowing area of a second air under an atmospheric pressure, including a pressure control means for secondarily decreasing the vacuum degree in the dust collecting compartment, and including a second supporting means for elastically supporting said pressure control means; and

    a connecting tube allowing for fluid-communication of said first cylinder, and for pneumatically connecting said first cylinder and said second cylinder to the dust collecting compartment.

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