Variable speed pump-motor assembly for fuel dispensing system
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United States of America Patent
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-
Aug 10, 1999
Issued Date -
N/A
app pub date -
May 28, 1998
filing date -
Jul 11, 1995
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
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.
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