Patent ID: 7665457
Filing Date: 2010-02-23
Classification: F24C

Abstract:
1. A wall thimble for use in a wall opening of a building as part of a venting apparatus for a heating appliance located inside of the building, said heating appliance having an exhaust outlet and a combustion air inlet, wherein an exhaust pipe is coupled to the exhaust outlet and a pipe is coupled to the combustion air inlet, comprising: a pair of mounting plates each adapted to be affixed on opposite sides of the wall opening, namely an inside mounting plate and an outside mounting plate, each mounting plate having a corresponding first opening therein aligned with the wall opening; a hollow structure coupled to the mounting plates, said hollow structure comprising a surface enclosing an area and having opposing ends that are open, said surface being sized in correspondence with the first openings in the mounting plates; and a pair of cover plates affixed to the opposing ends of the surface, each cover plate having a corresponding second opening therein which is smaller than the first opening and sized to receive the exhaust pipe therethrough such that a first passageway is defined within the exhaust pipe and a second passageway is defined between the exhaust pipe and the surface of the hollow structure; wherein one end of the hollow structure is an outside end and extends beyond the outside mounting plate to the outside of the building, and the other end of the hollow structure is an inside end; wherein outside vent openings are formed on the surface of the hollow structure proximate to the outside end, and wherein inside vent openings are formed on the surface of the hollow structure proximate to the inside end; and wherein the inside mounting plate includes a third opening proximate to the inside vent openings and a coupling adapted to receive the pipe.