Patent ID: 8387646
Filing Date: 2013-03-05
Classification: B67D,F16K,Y10T

Abstract:
1. A double-walled shear valve that carries fuel from a branch or main fuel piping to fuel dispenser piping comprising: a housing arrangement comprising a containment housing and an inner housing, said housing arrangement having an axial length extending between a first end and a second end thereof; said containment housing defining a shear groove on the outside circumference of the containment housing; said 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 between the containment housing and the inner housing which is separate from the fuel flow path and not normally in fluid communication therewith; the interstitial space being configured to provide continuous fluid communication along the axial length of said housing arrangement to fluidly couple with interstitial spaces of upstream and downstream piping connected to said housing arrangement; and a main poppet valve coupled to the inner housing that is adapted to close the fuel flow path to prevent flow of fuel.