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Fuel dispensers are converted to provide vaccum assisted recovery of vapors. Where previously provided with, or “plumbed”for, a pressure balance type of recovery system, the prior hose means is disconnected to permit mounting of a fuel driven, vacuum pump in communication with preexisting fuel and v

Fuel dispensers are converted to provide vaccum assisted recovery of vapors. Where previously provided with, or “plumbed”for, a pressure balance type of recovery system, the prior hose means is disconnected to permit mounting of a fuel driven, vacuum pump in communication with preexisting fuel and vapor conduit means. Where there has been no prior provision for vapor recovery, conduit means are installed to provide communication between the dispenser pedestal and a remote receiver for fuel vapors. One end of a coaxial hose, preferably of the inverted type, is mounted on the pump and the opposite end of the coaxial hose is connected to a vacuum assist nozzle.

대표청구항 ▼

A method of converting a fuel dispenser from pressure balance, vapor recovery operation to vacuum assisted vapor recovery operation, where the dispenser comprises a pedestal, a pressure balance, fuel dispensing nozzle, a coaxial hose having fuel and vapor passages and connected at one end to the noz

A method of converting a fuel dispenser from pressure balance, vapor recovery operation to vacuum assisted vapor recovery operation, where the dispenser comprises a pedestal, a pressure balance, fuel dispensing nozzle, a coaxial hose having fuel and vapor passages and connected at one end to the nozzle, an adapter, on the pedestal, having separate connections to a source of pressurized fuel and to a remote receiver for fuel vapors, said coaxial hose being connected, at its other end, to a said adapter with the hose, fueled passage in communication with the pressurized fuel source and places the hose, vapor passage in communication with the remote receiver, comprising the steps of disconnecting the coaxial hose fitting from the adapter, mounting a fuel driven, vacuum pump on the adapter with the source of pressurized fuel in communication with a pump, fuel passage and the vapor receiver in communication with a pump, vapor passage, said pump having an impeller disposed in the pump, vapor passage and driven by flow of fuel through the pump, fuel passage, mounting one end of a coaxial hose on the vacuum pump, to place a hose, fuel passage in communication with an outlet from the pump, fuel passage and to place a hose, vapor passage in communication with an inlet to the pump, vapor passage, mounting a vacuum assist nozzle on the opposite end of the coaxial hose that is mounted on the vacuum pump, thereby providing a vacuum assist in drawing vapors into vapor passage means of the vacuum assist nozzle connected to the opposite end of the coaxial hose.