Patent ID: 7681583

Claim:
A double-walled shear valve that carries fuel from branch or main fuel piping to fuel dispenser piping, comprising: a containment housing defining a shear groove on the outside circumference of the containment housing; an inner housing defining an inner housing orifice therein forming a fuel flow path; the inner housing coupled to the containment housing, and at least partially surrounded by the containment housing, such that an interstitial space is formed separate from the fuel flow path between the containment housing and the inner housing; and a main poppet valve coupled to the inner housing that is adapted to close the fuel flow path to prevent flow of fuel; wherein the inner housing is further comprised of an inner housing flange coupled to an inner housing body portion having the inner housing orifice therein, wherein the inner housing flange seals off the interstitial space when the inner housing body portion is coupled to the containment housing.