Patent ID: 7107780

Claim:
A vacuum-breaking valve for a refrigerated cabinet closed by a door operated by the user, said valve comprising: a tubular body mounted through one of the walls of the cabinet and having inner and outer ends, which are respectively opened to the inside and to the outside of cabinet; a valve seat provided on the outer end of the tubular body and defining a fluid communication between the inside and the outside of the cabinet; and a seal mounted to the tubular body and constantly biased towards a closed position and seated against said valve seat, blocking the valve seat, and displaceable towards an open position, spaced from the valve seat, opening the valve seat; wherein the seal comprises: a slide axially and slidingly mounted through the valve seat and has a closed end portion and an opposite end portion, which are interconnected by a peripheral lateral contour carrying a surrounding sealing ring, which is seated against the valve seat when the slide is displaced to the closed seal position and which is spaced away from the valve seat when the slide is displaced to the open seal position; wherein the slide being provided with at least one air passage connecting the opposite end portion of the slide with a region of the lateral peripheral contour located between said opposite end portion and the sealing ring, said air passage being upstream the valve seat when the slide is in the closed seal position and interconnecting the upstream and downstream sides of the valve seat when the slide is in the open seal position, said slide has a tubular shape, with the opposite end portion axially opened, each air passage being defined by a window provided on the peripheral lateral contour, connecting the latter with the open opposite end portion of the slide.