초록 ▼

A fuel dispensing nozzle includes a nozzle body and a projecting spout and surrounding bellows which define a fuel supply passage and a vapor return passage connected to corresponding concentric passages within flexible coaxial hoses. The body supports a manually actuated control valve within the fu

A fuel dispensing nozzle includes a nozzle body and a projecting spout and surrounding bellows which define a fuel supply passage and a vapor return passage connected to corresponding concentric passages within flexible coaxial hoses. The body supports a manually actuated control valve within the fuel passage, and a pressure responsive check valve is also located within the fuel passage adjacent the spout. The check valve includes a valve member normally biased against a tapered valve seat, and a first venturi suction passage extends from the valve seat to control a pressure responsive diaphragm mechanism for automatically closing the manually actuated valve when fuel blocks a suction vent line within the of the spout. A second venturi suction passage extends from the valve seat through the nozzle body and connects with a fuel evacuation passage within a flexible tube which extends downwardly into the vapor passage within the coaxial hoses. The vapor return passage within the nozzle body is normally closed by a spring biased valve member which opens in response to collapsing of the bellows, and excessive vapor pressure within the vapor passage also operates the diaphragm mechanism to close the manually actuated valve.

대표청구항 ▼

A dispensing nozzle assembly adapted for use with a vapor recovery fuel dispensing system including flexible hoses defining a liquid fuel supply passage and a return vapor passage, said nozzle assembly comprising a nozzle body, an elongated fuel supply spout extending from said body, means associate

A dispensing nozzle assembly adapted for use with a vapor recovery fuel dispensing system including flexible hoses defining a liquid fuel supply passage and a return vapor passage, said nozzle assembly comprising a nozzle body, an elongated fuel supply spout extending from said body, means associated with said body and defining a primary fuel supply passage and a return vapor passage extending from said spout for forming extensions of the corresponding passages within the hoses, a fuel control valve within said fuel supply passage within said body, means for automatically closing said fuel control valve in response to the presence of fuel adjacent said spout, means defining a first venturi suction passage downstream of said fuel control valve and connected to actuate said means for automatically closing said fuel control valve, means defining a second venturi suction passage downstream of said fuel control valve and separate from said first venturi passage, and means associated with said body and defining a fuel evacuation passage extending from said second venturi passage into the return vapor passage within the hoses for efficiently aspirating fuel condensed from vapor and accumulated within the return vapor passage within the hoses into the fuel flowing within said spout and for minimizing the fuel flow restrictions within the hoses and said nozzle assembly.