초록 ▼

An emergency valve is provided to shut off the flow of fuel in the event a fuel dispenser is struck with sufficient force to rupture the fuel conduit means therefor. The valve comprises a lower housing connected to a source of pressurized fuel and an upper housing connected to conduit means which ex

An emergency valve is provided to shut off the flow of fuel in the event a fuel dispenser is struck with sufficient force to rupture the fuel conduit means therefor. The valve comprises a lower housing connected to a source of pressurized fuel and an upper housing connected to conduit means which extend to a dispensing nozzle. The upper housing has a groove which defines the plane of a weakened portion. When the impacted with a relatively high lateral force, the portion of the upper housing, above the groove, will separate, or break away. A normally open, main control, flapper valve is mounted in the lower housing. A poppet check valve is mounted in the upper housing. When the separable portion of the upper housing breaks away, both the flapper valve and the check valve automatically close to minimize spillage of fuel. A bleed valve is provided to relieve pressure in the fuel conduit means to which the separable portion of the upper housing is connected, in the event a fire occurs upon its breaking away. In one embodiment the check valve yieldingly engages a seat formed in the upper end of the upper housing, immediately above the notch and is opened by fuel flow pressure. In another embodiment the check valve is normally held open by a post projecting upwardly from a bridge mounted beneath the groove. In a third embodiment, the poppet valve is also held in an open position by a similar post and is engageable with a seat formed in the upper staff ace of the upper housing. The upper housing and check valve comprises a replacement unit which can be mounted on existing lower housing to provide the benefits of the present invention or to replace an upper housing when an accident occurs.

대표청구항 ▼

An emergency valve adapted for installation at the base of a fuel dispensing unit with its lower end connected to a source of pressurized fuel and its upper end connected to conduit means extending, through the dispensing unit, to a dispensing nozzle, said emergency valve comprising housing means de

An emergency valve adapted for installation at the base of a fuel dispensing unit with its lower end connected to a source of pressurized fuel and its upper end connected to conduit means extending, through the dispensing unit, to a dispensing nozzle, said emergency valve comprising housing means defining a fuel flow path from the lower end of the valve to the upper end of the valve, the lower end portion of the housing means being adapted to be rigidly mounted, first and second valve means disposed in series flow relation in said fuel flow path, said housing means having a weakened portion defining a plane, intermediate the first and second valve means, on which the upper portion thereof will separate when subjected to a predetermined lateral loading, said first valve means and said second valve means both permitting the flow of fuel from the bottom of the housing means to the top thereof, when the housing means is intact; said first valve means having a closed position in which flow of fuel toward said second valve means is prevented, said first valve means being displaced to its closed position in response to separation of the housing means at said plane, said second valve means having a closed position in which flow of fuel toward said first valve means is prevented, said second valve means being displaced to its closed position in response to separation of the housing means at said plane, and characterized by means for limiting the pressure downstream of the second valve means, when the housing means has separated.