Vapor controlled fuel dispensing nozzle attachment
AssigneeExxon Research & Engineering Co.
InventorRobert F. Tammera
Life of this patent
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Abstract
An improved vapor recovery system for a fuel dispensing nozzle having an automatic shut-off. The improvement includes a lockout for activating the automatic shut-off, an activating collar having one end adjacent to the lock-out and able to engage the lock-out when the nozzle is dispensing fuel, and a seal enclosing the lock-out and the collar, the seal having (i) a cup-shaped portion at end that fits over and circumferentially around the fuel inlet while the nozzle is dispensing fuel, (ii) a middle portion that compresses while the nozzle is dispensing fuel, and (iii) an interior constriction that engages the end of the collar opposite of the lock-out so as to prevent back splashed fuel from entering the portion of the seal enclosing the collar.
Claims6
An improvement on a fuel vapor recovery system for a fuel dispensing nozzle having an automatic shut-off for dispensing fuel into a fuel inlet, wherein said improvement comprises:
- (a) a lock-out for activating said automatic shut-off
- (b) an activating collar having one end adjacent to said lock-out and able to engage said lock-out when said nozzle is dispensing fuel, and
- (c) a seal enclosing said lock-out and said collar, said seal having (i) a cup-shaped portion having a concave side at the end that fits over and circumferentially around said fuel inlet while said nozzle is dispensing fuel so that said concave side of said cup is in sealing engagement with said fuel inlet, (ii) a middle portion that compresses while said nozzle is dispensing fuel, and (iii) an interior constriction that engages the end of said collar opposite of said lock-out so as to prevent back splashed fuel from entering the region between the activating collar and the interior of the seal.
Dependencies are inferred from the claim text.