Patent ID: 8408196
Filing Date: 2013-04-02
Classification: F23J,F23L,F24C

Abstract:
1. An interface structure coupling a first pipe with a second pipe at an interface as part of an exhaust/intake system used with a heating appliance, wherein at least the first pipe includes an outer wall, an inner wall, and a first annular space defined between the outer wall and the inner wall, comprising: a frame having a central circular opening; a frame insert placed on the frame from above and having a first circular opening corresponding with the central circular opening of the frame, a vent opening offset from the first circular opening, and a raised lip that creates a space between the frame and the frame insert; a cylindrical vent collar having a top portion affixed to the frame at the central circular opening and extending a first height below the frame, with a first annular flange affixed to the vent collar at a bottom portion thereof, the first annular flange having a second circular opening; a cylindrical chase collar having a top portion affixed to the frame and extending a second height below the frame, the second height being larger than the first height, with a second annular flange affixed to the chase collar at a bottom portion thereof, the second annular flange having a third circular opening larger than the second circular opening; a cylindrical exhaust duct coupled to the annular flange of the vent collar and having a diameter corresponding with the second circular opening; the first pipe capable of coupling to the first annular flange of the vent collar and having a diameter slightly larger than the second circular opening and the outer wall thereof capable of coupling the second pipe capable of coupling to the second annular flange of the chase collar and having a diameter corresponding with the third circular opening.