B - Operations – Transporting – 60 – K
Patent
B - Operations, Transporting
60
K
B60K 15/035 (2006.01)
Patent
CA 2052765
FMC 0223 PUS -23- 89-134 Abstract A vent tube assembly (10) for use with a supply of fuel adapted for delivering fuel to a fuel tank (12) mounted in a vehicle (14), which enables an operator to fill the fuel tank (12) with a reasonably predictable quantity of fuel to its nominal capacity. The fuel tank (12) is provided with a filler neck (20) into which may extend a pressure-sensitive filler nozzle (22) in fluid communication with the supply, the filler nozzle (22) being adapted for terminating delivery of fuel into the fuel tank (12) when the vapor pressure therein exceeds a shut-off pressure. The vent tube assembly (10) comprises an inner vent tube (24) having at least one inner venting port (26) defined therein. The inner vent tube (24) extends downwardly through an upper portion of the fuel tank (12) for relieving vapor pressure in the fuel tank as the volume of fuel contained therein increases during replenishment from the supply until the fuel in the fuel tank rises to a fuel shut-off level (30). An outer vent tube (32) lies in telescoping relationship with the inner vent tube (24) and has a base (34) which is received by the lower portion of the fuel tank. The outer vent tube (32) is provided with at least one outer venting port (36) defined therein. A spring urges the outer vent tube (32) toward an ex- tended position so that the outer vent tube (32) is loaded against the lower portion of the fuel tank (12). The outer vent tube (32) is adapted to move in cooperation with the lower portion of the fuel tank (12). The vent tube assembly (10) provides a fuel shut-off level (30) which is determined at a fixed distance above the lower portion of the fuel tank, FMC 0223 PUS -24- 89-134 regardless of dimensional changes therein and vehicle attitude.
Danna Anthony J. Jr.
Ford Motor Company
Ford Motor Company Of Canada Limited
Sim & Mcburney
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