Dover Corporation

Jonathan P Young

David A Oberrecht

Charles J Moorman

Charles A Sunderhaus

Stephen J Stephenson

Victor A Schrand

Raymond C Pilch

Curtis E Frederick

Sean Scott

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.

Conversion of fuel dispensers to provide for vacuum assisted vapor

A vehicle identification system for use in a refueling station for identifying vehicle requirements, in which a control unit is located in a fuel dispenser for controlling functions of the dispenser such as fuel selection and activation of the dispenser's vapor recovery systems, and a driver circuit is located on the nozzle spout. The control unit communicates with the driver circuit through an intrinsically safe connection in a fuel hose and is programmed to periodically transmit a low power pulse signal to the driver circuit through this connection. The driver circuit includes a power generating means and an antenna for generating an RF interrogation signal in response to each pulse. The RF interrogation signal is detected by a transponder disposed on a vehicle adjacent the vehicle's fill pipe, when the nozzle is positioned adjacent to or in the fill pipe for refueling. The RF interrogation signal energizes the transponder to transmit a return signal containing vehicle identification codes accessed from a memory storage means in the transponder. These identification codes identify vehicle requirements, such as for example, fuel type. The driver circuit further includes a filter for detecting the identification signal from the transponder, and transmitting the signal to the control unit. The control unit interprets the vehicle identification codes and generates signals to control the dispenser in accordance with the vehicle requirements.

Vehicle identification system for a fuel dispenser

A fuel dispensing nozzle is provided with a view glass/fuel flow indicator that are disposed between the main fuel valve and a downstream check valve. The view glass/flow indicator means comprise a pair of horizontally aligned view glasses. A plurality of embodiments illustrate the use of different sub-assemblies in providing the view glass/flow indicator functions, as well as different provisions for obtaining a seal that prevents leakage of fuel at the view glass units.

Liquid dispensing nozzles having improved view glass/flow indicators

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West Chester, OH, United States of America

Jonathan P Young