发明名称 |
Wall thimble with outside air inlet |
摘要 |
An improved wall thimble is useful as part of a venting apparatus for a direct vent 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 cylindrical portion can be inserted into a second cylindrical portion. When a smaller diameter exhaust pipe is routed through the cylindrical portions, an annular region is formed between the exhaust pipe and the cylindrical portions. A first air vent is formed in the first cylindrical portion to draw combustion air into the annular region from outside. A second air vent is formed in the second cylindrical portion to route the combustion air from the annular region to an opening in the housing where a combustion air inlet pipe is connected.
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申请公布号 |
US7665457(B2) |
申请公布日期 |
2010.02.23 |
申请号 |
US20070743065 |
申请日期 |
2007.05.01 |
申请人 |
SIMPSON DURA-VENT COMPANY, INC. |
发明人 |
JACKLICH JOHN R.;ADAIR ERIC |
分类号 |
F24C3/00;F23L17/04 |
主分类号 |
F24C3/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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