Patent ID: 6250325
Filing Date: 2001-06-26
Classification: B60K,Y10T

Abstract:
A roll over valve for vehicles, the roll over valve comprising:a hollow housing fixed at an upper end of a fuel tank and formed with a service pipe in order to cut off fuel gas;an outlet pipe fixedly disposed on the housing for connection to the housing and for connection to a cannister;a ball case for being liftably mounted in the housing and disposed with a sealing pad for blocking one side of the outlet pipe when lifted and formed to allow fuel gas to pass therethrough when descended; anda biasing spring for biasing the sealing Dad upwardly against the outlet pipe, the biasing spring being disposed in the housing and abutting the ball case;a ball disposed in the ball case, wherein the weight of the ball overcomes the force of the biasing spring causing the sealing pad to be normally detached from the outlet pipe; and wherein during a vehicle rollover the ball moves such that the weight of the ball is sufficiently relieved from the biasing spring allowing the biasing spring to bias the sealing pad against the outlet pipe to seal the outlet pipe.