Fluid handling – Systems – System with plural openings – one a gas vent or access opening
Patent
1997-09-26
1999-09-07
Rivell, John
Fluid handling
Systems
System with plural openings, one a gas vent or access opening
137587, 141324, 141 59, B65B 3900
Patent
active
059471530
ABSTRACT:
An improved filler neck for a fuel inlet of a vehicle fuel tank has a bend communicating with converging and diverging portions which control the flow of fuel through the filler neck to ensure that fuel flows through and downstream of the bend without backing up in the filler neck and actuating an automatic shutoff device of a refueling nozzle received in the filler neck. The filler neck also preferably has a bypass fuel passage through which fuel flows upstream through the filler neck and out to the atmosphere if a predetermined maximum pressure is exceeded within the fuel tank to limit the maximum pressure within the fuel tank and prevent it from being damaged or rupturing. Several angled ribs in the filler neck housing guide the refueling nozzle for proper positioning within the filler neck. Other ribs also provide gaps between the refueling nozzle and the filler neck housing to prevent the refueling nozzle from sealing the filler neck inlet. Slots at the nozzle interface provide a vent area to prevent a vacuum from being generated in the filler neck even when used with a refueling nozzle designed to provide a vapor tight seal at the refueling inlet to prevent liquid fuel from being drawn upstream through the filler neck and thereby prematurely activating the automatic shutoff device of the refueling nozzle.
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Bucci George H.
Johansen Mark R.
Neal Timothy P.
Rivell John
Schoenfeld Meredith H.
Walbro Corporation
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