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Liquid dispensing nozzle having a sealing arrangement for vapor return means

  • US 4,649,969 A
  • Filed: 11/22/1985
  • Issued: 03/17/1987
  • Est. Priority Date: 06/17/1976
  • Status: Expired due to Term
First Claim
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1. A liquid dispensing nozzle comprising a body;

  • a spout extending from said body having its free end for disposition in an opening of a fill pipe of a tank or the like;

    means to return vapor from the tank being filled to permanently remove the vapor from the tank to an area in which the vapor is collected for recovery, said vapor return means having no communication with said spout except through the tank being filled;

    first sealing means to form a seal between the fill pipe opening and said vapor return means when said spout is disposed in the fill pipe;

    second sealing means, separate from said first sealing means, to seal said vapor return means when said spout is not disposed in the fill pipe to prevent vapor from entering the atmosphere through said vapour return means from the area in which it is collected, said second sealing means being disposed within said vapor return means in spaced relation to said first sealing means;

    causing means to respond to said first sealing means being in its sealing position to cause said second sealing means to cease to be in its sealing position only after said first sealing means is in its sealing position;

    said second sealing means including first means and second means for cooperation with each other, said first means being mounted on said spout within said vapor return means, said second means being slidably supported by said body, said first and second means having sealing means to form a seal therebetween when said spout is not disposed in the fill pipe;

    said causing means including means to cause relative movement between said first and second means only after said first sealing means is in its sealing position when said spout is disposed in the fill pipe to cause said sealing means of said first and second means to cease to be in their sealing position;

    said vapor return means including compressible means in spaced relation to said spout to form an annular passage therebetween, said compressible means including a bellows having one end connected to said body, the other end of said bellows having said first sealing means connected thereto to enable vapor to flow through the annular passage; and

    said sealing means of said first and second means sealing the annular passage.

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