Claims
- 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.
- 2. The nozzle according to claim 1 including means to form a seal between said bellows and said second means.
- 3. A liquid dispensing nozzle comprising a body; a spout extending from said body and 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, said spout having relative movement with respect to said first sealing means when said spout is disposed in the fill pipe opening and said first sealing means engages 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 vapor 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; first resilient means acting between said first sealing means and said second sealing means to urge said first sealing means into engagement with the fill pipe to form a seal between the fill pipe opening and said vapor return means when said spout is disposed in the fill pipe and to urge said second sealing means out of its sealing position; second resilient means acting between said second sealing means and said body to urge said second sealing means to its sealing position; and said second resilient means having a force greater than the force to said first resilient means when said first sealing means is not in sealing engagement with the fill pipe so that said second sealing means is moved to its open position against the force of said second resilient means by relative movement between said spout and said first sealing means only after said first resilient means has been compressed to enable said first sealing means to be in its sealing position and the force of said first resilient means to become greater than the force of said second resilient means.
- 4. The nozzle according to claim 3 in which said second sealing means includes first means and second means for cooperation with each other, said first means is mounted on said spout within said vapor return means, said second means is 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 first resilient means acting on said second means of said second sealing means, and said second resilient means acting on said second means of said second sealing means to maintain said second means of second sealing means in engagement with said first means of said sealing means during relative movement of said spout with respect to said first sealing means until after said first resilient means has been compressed to maintain said first sealing means in its sealing position so that said second means of said second sealing means is moved rearwardly away from said first means of said second sealing means by the force of said first resilient means being greater than the force of said second resilient means.
- 5. A liquid dispensing nozzle comprising a body; a spout extending from said body and 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 vapor 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; and 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 causing means includes first means to continuously exert a force between said first sealing means and said second sealing means to urge said second sealing means out of its sealing position and second means to continuously exert a force between said second sealing means and said body to urge said second sealing means towards its sealing position, said second means of said causing means exerting a greater force than said first means of said causing means when said first sealing means is not in its sealing position to maintain said second sealing means in its sealing position, and said first means having its force increased when said first sealing means is in its sealing position so that the force of said second means is overcome to cause said second sealing means to cease to be in its sealing position.
- 6. A liquid dispensing nozzle comprising a body; a spout extending from said body and 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 vapor 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; and 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 includes first means and second means for cooperation with each other, said first means is mounted on said spout within said vapor return means, said second means is 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, and said causing means include first means to continuously exert a force between said first sealing means and said second means of said second sealing means to urge said second means of said second sealing means away from said first means of said second sealing means so that said second sealing means is urged out of its sealing position and second means to continuously exert a force between said second means of said second sealing means and said body to urge said second means of said second sealing means against said first means of said second means so that said second sealing means is urged towards its sealing position, said second means of said causing means exerting a greater force than said first means of said causing means when said first sealing means is not in its sealing position to maintain said second means of said second sealing means in engagement with said first means of said second sealing means so that said second sealing means is maintained in its sealing position, and said first means of said causing means having its force increased when said first sealing means is in its sealing position so that the force of said second means of said causing means is overcome to move said second means of said second sealing means away from engagement with said first means of said second sealing means to cause said second sealing means to cease to be in its sealing position.
Parent Case Info
This is a continuation of application Ser. No. 683,657 filed Dec. 19, 1984 now abandoned; which is a continuation of application Ser. No. 918,057 filed June 22, 1978, now abandoned; which is a continuation of application Ser. No. 856,110 filed Nov. 30, 1977, now abandoned; which is a continuation of application Ser. No. 696,937 filed June 17, 1976, now abandoned.
US Referenced Citations (6)
Continuations (4)
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Number |
Date |
Country |
Parent |
683657 |
Dec 1984 |
|
Parent |
918057 |
Jun 1978 |
|
Parent |
856110 |
Nov 1977 |
|
Parent |
696937 |
Jun 1976 |
|