Fluent material handling – with receiver or receiver coacting mea – Diverse fluid containing pressure filling systems involving... – Filling with exhausting the receiver
Patent
1996-06-28
1999-02-09
Jacyna, J. Casimer
Fluent material handling, with receiver or receiver coacting mea
Diverse fluid containing pressure filling systems involving...
Filling with exhausting the receiver
141 83, 141 94, 141192, 417 18, 417 32, 417 43, 417 4411, 417 45, 417360, 4174103, 417422, 418104, 418259, B67D 506
Patent
active
058681752
ABSTRACT:
This disclosure relates to a vapor recovery unit of a fuel dispenser, and comprises a vapor pump, a variable speed electric motor coupled to drive the pump, and an electric control package connected to control the speed of the motor, the foregoing components being located in an integrated unit housing. The pump comprises a positive displacement vapor pump such as a vane pump; the motor comprises a variable speed induction motor; and the control package is operable to receive fuel-flow representative pulses from one or two flow meters, and to vary the pump-motor speed to recover substantially all of the displaced vapor during fueling. The unit housing is preferably installed in a dispenser cabinet and hydraulically coupled in a vapor flow pipe and electrically connected to receive the fuel flow pulses from one or two fuel flow meters. The vapor recovery unit is useful as original equipment (OEM) and/or as a retrofit component. The control package is operable to adjust or modify the pump-motor speed to compensate for the vapor pump temperature and nonlinear operating characteristics. An improved calibration arrangement is provided, and an improved fault detection arrangement is provided. The unit also includes an improved arrangement for heating the pump-motor at low ambient temperatures.
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Awad Jason G.
Beatty Jim A.
Duff Richard L.
Franklin Electric Co. Inc.
Jacyna J. Casimer
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