Patent ID: 6289916
Filing Date: 2001-09-18
Classification: B60K,F16K,Y10T

Abstract:
A venting system for an automobile vehicle fuel tank, of the type in which a valve (12) is provided with a weight (22) in a chamber (14) into which open an inlet orifice (16) connected to the tank and an outlet orifice (18), the weight of the weight (22) causes it to close the valve (12) when the vehicle is stopped and in a substantially horizontal position, and vibration generated when the vehicle is started or is moving causes the weight (22) to open the valve (12) and vent the tank,characterized in that the weight (22) bears on a concave top face (24) of a cup (20) whose bottom face (26) includes closure means (30) adapted to cooperate with a seat (36) formed in a valve body to shut off one orifice (16) of the valve (12) when the cup (20) is maintained in a closing position by the weight (22) in a stable equilibrium position at the bottom of the top concave surface (24), and in that when the weight (22) is shifted from its stable equilibrium position by vibration it tilts the cup (20) to interrupt the cooperation of the closure means (30) with the seat (36) and thereby open the valve (12).