초록 ▼

A motor vehicle fuel fill pipe shut-off device includes a fuel shut-off valve normally closed relative to a valve seat and disposed in a path of fuel flow through the fuel fill pipe of the motor vehicle to a fuel tank thereof. The valve is connected to a diaphragm in a manner to define in part a cha

A motor vehicle fuel fill pipe shut-off device includes a fuel shut-off valve normally closed relative to a valve seat and disposed in a path of fuel flow through the fuel fill pipe of the motor vehicle to a fuel tank thereof. The valve is connected to a diaphragm in a manner to define in part a chamber communicated by an inlet orifice to the fuel fill pipe and by an outlet orifice to the fuel tank that is vented during fueling to a charcoal canister wherein a fluid pressure in the chamber is lower than that in the fuel fill pipe during fueling to permit opening of the valve by fuel introduced through the fuel fill pipe, A fuel float or solenoid moves a closure to close off communication of the outlet orifice to the fuel tank when fuel level in the fuel tank reaches the predetermined "full" level to increase chamber fluid pressure to permit movement of the valve by a biasing spring as assisted by the diaphragm toward the valve seat and achieve closing of the valve to prevent further filling of the fuel tank with fuel.

대표청구항 ▼

[ What is claimed is:] [1.]1. A vehicle fuel fill pipe shut-off device, comprising a valve housing adapted to be disposed on a side of a fuel tank and a fuel shut-off valve in said housing normally closed relative to a valve seat that is disposed in a path of fuel flow through a fuel fill pipe to sa

[ What is claimed is:] [1.]1. A vehicle fuel fill pipe shut-off device, comprising a valve housing adapted to be disposed on a side of a fuel tank and a fuel shut-off valve in said housing normally closed relative to a valve seat that is disposed in a path of fuel flow through a fuel fill pipe to said fuel tank, said valve being connected to a diaphragm in a manner to define in part a chamber communicated by a first orifice to said fuel fill pipe and by a second orifice to said fuel tank during fueling of said fuel tank below a predetermined fuel level, said valve being opened during said fueling by fuel introduced through said fuel fill pipe to said fuel tank, and a closure member for interrupting communication between said second orifice and said fuel tank when fuel level in said fuel tank reaches the predetermined fuel level to permit movement of said valve toward said valve seat and achieve closing of said valve to prevent further filling of said fuel tank with fuel, said closure member being connected to a fuel float disposed in an upstanding sleeve adapted to be disposed in said fuel tank and movable up and down in said sleeve in response to fuel level therein.