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Toilet odor removal system

  • US 6,016,576 A
  • Filed: 07/06/1999
  • Issued: 01/25/2000
  • Est. Priority Date: 07/06/1999
  • Status: Expired due to Fees
First Claim
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1. An odor removal system for removing noxious vapors from a commode comprising:

  • a) a toilet seat comprising a conduit for exhausting noxious vapors, and a hollow seat mount;

    b) an exhaust hose;

    c) a fan driven by an electric motor; and

    d) an electric circuit comprising;

    a switch that is activated when a person sits on said toilet seat;

    wiring connected to said switch and routed through said conduit;

    a first resistor;

    a capacitor;

    a second resistor;

    a transistor;

    a diode; and

    a normally open relay;

    wherein, when said switch is closed, current is applied to a base of said transistor allowing current flow across a collector-emitter junction of said transistor, said current actuating said normally open relay that controls said motor driving said fan to operate said fan and draw noxious vapors from said commode, through said conduit, hollow seat mount, and exhaust hose, and through said fan, while current is allowed to pass through said first resistor and to be applied to a positive plate of said capacitor until a saturation level allowed by the capacitance of said capacitor is reached;

    wherein when said switch is subsequently opened, the charge stored in said capacitor is allowed to discharge through said second resistor which causes a positive potential to be maintained at the base of said transistor, allowing current flow through said collector-emitter junction of said transistor to continue, until the stored charge in said capacitor goes below a level required to maintain the current flow in said transistor, whereupon said transistor acts as a switch that is turned off and causes said normally open relay to stop passing current to said motor, said allowance of current flow causing a delay in said fan being turned off after said switch is opened,wherein said diode dampens a release pulse generated by said relay when said relay is deenergized.

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