초록 ▼

A valve assembly disposed in a nozzle of a fuel-dispensing pump that, when in an open, operative position, freely allows fuel to flow therethrough. In a closed position, fuel is prevented from dripping from the end of the fuel-dispensing nozzle. A first embodiment provides a spherical or flat, sprin

A valve assembly disposed in a nozzle of a fuel-dispensing pump that, when in an open, operative position, freely allows fuel to flow therethrough. In a closed position, fuel is prevented from dripping from the end of the fuel-dispensing nozzle. A first embodiment provides a spherical or flat, spring-loaded one-way sealing element or check valve that is forced away from the dispensing end of the nozzle to allow fuel to flow therefrom. When fuel dispensing is complete, the check valve seals the nozzle. In a second embodiment, apertures in a cap are rotated between an open and a closed orientation to allow or block fuel passage depending upon their angular position. The valve assembly is press fitted into a conventional fuel-dispensing nozzle.

대표청구항 ▼

What is claimed is: 1. A shut-off valve for use with a liquid dispensing system, comprising: a) a valve body having a distal face, a proximal surface and a periphery, at least a portion of said periphery being dimensioned to fit snuggly within a liquid delivery nozzle, said valve body comprising at

What is claimed is: 1. A shut-off valve for use with a liquid dispensing system, comprising: a) a valve body having a distal face, a proximal surface and a periphery, at least a portion of said periphery being dimensioned to fit snuggly within a liquid delivery nozzle, said valve body comprising at least one unimpeded orifice extending from said distal face to said proximal surface thereof and comprising stopping means attached thereto; b) a cap disposed proximate said distal face of said valve body, said cap having at least one unimpeded orifice formed therethrough, said cap being rotatable between a first, closed orientation and a second, open orientation; and c) means for rotating said cap, said means being spaced apart therefrom, and said cap rotating from said first, closed orientation to said second, open orientation and responsive to a flow of liquid in said liquid delivery nozzle; and d) biasing means operatively connected to said cap; whereby when said cap is disposed at said first, closed orientation, liquid flow from said at least one unimpeded orifice in said valve body is blocked through the use of said biasing means and when said cap is disposed at said second, open orientation, said at least one unimpeded orifice in said cap is aligned with said at least one unimpeded orifice in said valve body thereby allowing liquid to be discharged from said liquid delivery nozzle. 2. The shut-off valve for use with a liquid dispensing system in accordance with claim 1, wherein said at least one orifice in said valve body comprises a plurality of orifices disposed in a first, predetermined pattern and said at least one orifice in said cap comprises a plurality of orifices arranged in a second, predetermined pattern. 3. The shut-off valve for use with a liquid dispensing system in accordance with claim 2, wherein said first predetermined pattern of orifices is blocked by said second predetermined pattern of orifices when said cap is disposed in said first, closed orientation and said first pattern of orifices is unobstructed when said cap is disposed in said second, open orientation. 4. The shut-off valve for use with a liquid dispensing system in accordance with claim 1, wherein said means for rotating said cap comprises an impeller disposed for operative interaction with a liquid in said liquid delivery nozzle. 5. The shut-off valve for use with a liquid dispensing system in accordance with claim 1, further comprising: e) sealing means disposed between said distal face of said valve body and said cap for providing a liquid tight seal therebetween. 6. The shut-off valve for use with a liquid dispensing system in accordance with claim 1, wherein said valve is housed completely within said delivery nozzle.