초록 ▼

A pumping system for use in a fuel service station including one or more fuel dispensers, a fuel storage tank and conduits connecting the fuel dispensers with the tank. The pumping system comprises a variable speed pump-motor assembly for pumping fuel from the storage tank to the conduit and the dis

A pumping system for use in a fuel service station including one or more fuel dispensers, a fuel storage tank and conduits connecting the fuel dispensers with the tank. The pumping system comprises a variable speed pump-motor assembly for pumping fuel from the storage tank to the conduit and the dispensers, and a control connected to the pump-motor assembly for holding the fuel pressure in a preset range. Preferably the range is that required for efficient operation of a vapor recovery system, or other requirement by the EPA or by another agency, or by a service station operator. The control includes sensors which respond to the pressure in the conduits leading to the fuel dispensers. The sensors may comprise, for example, a pressure sensor in the conduit, or they may comprise power consumption sensors connected to the electrical power supply for the variable speed pump-motor assembly.

대표청구항 ▼

A pumping system for a fuel service station, the service station including at least one fuel storage tank, a plurality of fuel dispensers, and fuel flow conduits for conveying fuel from the storage tank to the dispensers, said pumping system comprising: a) a fuel dispensing hose and nozzle on each f

A pumping system for a fuel service station, the service station including at least one fuel storage tank, a plurality of fuel dispensers, and fuel flow conduits for conveying fuel from the storage tank to the dispensers, said pumping system comprising: a) a fuel dispensing hose and nozzle on each fuel dispenser for delivering fuel to a motor vehicle fuel tank in response to activation of independently-operable switches connected to each of such dispensers; b) a fuel pump; c) means for coupling said fuel pump to said conduits whereby said fuel pump is operable to pump fuel through said conduits to said dispensers; d) an electric motor connected to an electrical power source to drive said fuel pump; e) sensors connected to the power source for determining the power drawn by said electric motor and providing power representative signals; and f) electric means responsive to said signals for adjusting the speed of said motor to maintain the fuel pressure in said flow conduits at a substantially constant pressure regardless of the fuel flow demand.