Apparatus for evacuating condensation from furnace pipe systems
AssigneeFasco Industries, Inc.
InventorLeslie Alan Lyons
Life of this patent
Estimating the term…
Abstract
An apparatus for evacuating liquid condensation from pipe systems which is particularly applicable to exhaust pipe systems in high efficiency furnaces. The apparatus forms a junction sleeve between two pipes and has drainage channels which prevent condensate liquid from flowing from one pipe into the other pipe. A thermoplastic rubber composition of the apparatus dampens noise and vibration in the pipe system. External grooves provide locating features for mounting clamps.
Claims20
An apparatus for evacuating condensate water from a pipe comprising:
- an inner cylinder concentrically affixed to an outer cylinder by an annular wall disposed between said inner cylinder and said outer cylinder wherein said annular wall divides the space between said inner cylinder and said outer cylinder into an input side pipe groove and an output side pipe groove;
- further comprising
- an inside diameter of an input end of said outer cylinder which is about slightly greater than an outside diameter of a mating input pipe;
- an inside diameter of an output end of said outside cylinder which is about slightly greater than an outside diameter of a mating output pipe;
- an outside diameter of an input end of said inside cylinder which is about slightly less than an inside diameter of the mating input pipe;
- a plurality of ribs protruding from an outside surface of said inner cylinder and extending generally parallel to a central axis of said inner cylinder and said outer cylinder wherein said plurality of ribs are sized to provide an interference fit with an inside surface of an output pipe and wherein said ribs leave an annular space adjacent to an output facing side of said annular wall;
- at least one boss protruding into said output side pipe groove wherein said at least one boss forms a pipe-stop which prevents an output side pipe from abutting said annular wall;
- and at least one edge defining a drain hole passing through said outside cylinder and into said output pipe groove proximate to said annular wall.
An apparatus for evacuating condensate water from an exhaust pipe coupled to a heating system blower, the apparatus comprising:
- an inner cylinder extending between a blower end and an exhaust end, the inner cylinder including an outer surface having an outer diameter slightly less than an inside diameter of the exhaust pipe, such that the exhaust pipe is receivable along the outer surface of the inner cylinder;
- an outer cylinder coaxial with the inner cylinder and positioned to surround at least a portion of the inner cylinder, the outer cylinder being affixed to the inner cylinder by an annular wall, wherein the annular wall extends between the outer surface of the inner cylinder and an inner surface of the outer cylinder to form an exhaust pipe cavity between the outer cylinder and the inner cylinder, wherein the length of the inner cylinder from the annular wall to the exhaust end prevents condensate water accumulated in the exhaust cavity from entering into the exhaust pipe;
- at least one boss protruding into the exhaust pipe cavity adjacent to the annular wall to form a pipe-stop, wherein the pipe-stop prevents the exhaust pipe from abutting the annular wall;
- and
- at least one drain hole extending through the outer cylinder and into the exhaust pipe cavity adjacent to the annular wall, wherein The drain hole allows condensate water accumulated in the exhaust pipe cavity to drain from the exhaust pipe cavity.
Dependencies are inferred from the claim text.