Dripless means for a fuel dispensing nozzle
First Claim
1. A nozzle for dispensing fuel into a vehicle tank has a spout;
- a bushing at the distal end of said spout said bushing having a generally cylindrical shape with a front having a lip, a step of lesser diameter than said lip, a rear of similar diameter to said front, and a hollow center there through; and
, a cylindrical vent tube within said spout, wherein the improvement comprises;
said spout having a surface treatment upon a portion of the interior of said spout;
said bushing having one or more arc weirs upon the interior of said bushing; and
, said vent tube having a tip restrictor installed therein;
whereby, said surface treatment, said sections, and said tip restrictor cooperate to retain fuel drops within said nozzle.
1 Assignment
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Accused Products
Abstract
A dripless means for a fuel dispensing nozzle begins with a nozzle for dispensing fuel into automobile tanks. Regulations limit drainage of the spout to within ten seconds, met by the present invention that prevents fuel drops from exiting the spout. First, the spout retains fuel drops behind a dam made of a series of fins upon the interior of the spout. Second, the present invention has a bushing with a weir that works in combination with the damming. Third, the nozzle has a vent tube within the spout where a plug constricts its diameter to limit the fuel drawn into the vent tube. With proper use, the present invention retains fuel drops in the spout to meet the regulations.
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Citations
14 Claims
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1. A nozzle for dispensing fuel into a vehicle tank has a spout;
- a bushing at the distal end of said spout said bushing having a generally cylindrical shape with a front having a lip, a step of lesser diameter than said lip, a rear of similar diameter to said front, and a hollow center there through; and
, a cylindrical vent tube within said spout, wherein the improvement comprises;
said spout having a surface treatment upon a portion of the interior of said spout;
said bushing having one or more arc weirs upon the interior of said bushing; and
,said vent tube having a tip restrictor installed therein;
whereby, said surface treatment, said sections, and said tip restrictor cooperate to retain fuel drops within said nozzle. - View Dependent Claims (2, 3, 4, 5, 6, 7)
- a bushing at the distal end of said spout said bushing having a generally cylindrical shape with a front having a lip, a step of lesser diameter than said lip, a rear of similar diameter to said front, and a hollow center there through; and
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8. A method to impede fuel within a nozzle following shutoff preventing formation of drips, said nozzle having a spout, a bushing at the distal end of said spout, and a vent tube within said spout, the steps comprising:
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applying a texture to the interior surface of said spout, wherein capillary action and hydraulic damming retains fuel drops within said spout;
providing three equally spaced arc weirs extending into a bushing wherein hydraulic damming retains fuel within said bushing; and
,installing a vapor restrictor within said vent tube therein reducing the fuel in said vent tube. - View Dependent Claims (9)
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10. A nozzle for dispensing fuel into a vehicle tank has a spout;
- a bushing at the distal end of said spout said bushing having a generally cylindrical shape with a front having a lip, a step of lesser diameter than said lip, a rear of similar diameter to said front, and a hollow center there through; and
, a cylindrical vent tube within said spout, wherein the improvement comprises;
said spout having a plurality of fins being concentric and upon the circumference of the interior of said spout, said plurality located upon a portion of the length said spout, to retain fuel drops within said nozzle. - View Dependent Claims (11)
- a bushing at the distal end of said spout said bushing having a generally cylindrical shape with a front having a lip, a step of lesser diameter than said lip, a rear of similar diameter to said front, and a hollow center there through; and
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12. A nozzle for dispensing fuel into a vehicle tank has a spout;
- a bushing at the distal end of said spout said bushing having a generally cylindrical shape with a front having a lip, a step of lesser diameter than said lip, a rear of similar diameter to said front, and a hollow center there through; and
, a cylindrical vent tube within said spout, wherein the improvement comprises;
said bushing having one or more arc weirs upon the interior of said bushing and extending into said bushing, to retain fuel within said nozzle. - View Dependent Claims (13)
- a bushing at the distal end of said spout said bushing having a generally cylindrical shape with a front having a lip, a step of lesser diameter than said lip, a rear of similar diameter to said front, and a hollow center there through; and
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14. A nozzle for dispensing fuel into a vehicle tank has a spout;
- a bushing at the distal end of said spout said bushing having a generally cylindrical shape with a front having a lip, a step of lesser diameter than said lip, a rear of similar diameter to said front, and a hollow center there through; and
, a cylindrical vent tube within said spout, wherein the improvement comprises;
said vent tube having a tip restrictor installed therein, to retain fuel within said nozzle, said tip restrictor having a generally hollow cylindrical shape to fit snugly within said vent tube, an inner diameter less than one half the diameter of said vent tube, and a location within said vent tube generally centered.
- a bushing at the distal end of said spout said bushing having a generally cylindrical shape with a front having a lip, a step of lesser diameter than said lip, a rear of similar diameter to said front, and a hollow center there through; and
Specification