Stoves and furnaces – Stoves – Heating
Reexamination Certificate
2009-08-20
2011-11-15
McAllister, Steven B (Department: 3749)
Stoves and furnaces
Stoves
Heating
C126S314000, C126S084000, C126S02100R, C126S094000
Reexamination Certificate
active
08056552
ABSTRACT:
A wall thimble for use with a heating appliance. Dual functionality is provided in a single wall thimble device by having a vent path for exhausting combustion by-products, and a separate air inlet path to draw in outside combustion air for use by the heating appliance. The wall thimble is formed as a two-part housing such that a first portion can be inserted into a second portion. When an exhaust pipe is routed through end plates on the housing portions, a closed region is formed between the exhaust pipe and the housing portions. A first air vent is formed in the first or outside portion to draw combustion air into the closed region from outside. A second air vent is formed in the second or inside portion to route the combustion air from the closed region to an opening in the housing where a combustion air inlet pipe is connected.
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Adair Eric
Jacklich John R.
M&G DuraVent, Inc.
Mashruwala Nikhil
McAllister Steven B
Vierra Magen Marcus & DeNiro LLP
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