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Priority date (The priority date is an assumption and is not a legal conclusion. Erickson Original Assignee Erickson Paul E. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Lifetime Application number US09/073,056 Inventor Paul E.
#AUTOMATIC DRAFT CONTROL WOOD FURNACE PDF#
Google Patents Bi-metallic control deviceÄownload PDF Info Publication number US6041770A US6041770A US09/073,056 US7305698A US6041770A US 6041770 A US6041770 A US 6041770A US 7305698 A US7305698 A US 7305698A US 6041770 A US6041770 A US 6041770A Authority US United States Prior art keywords flap metal air crank arm temperature Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google Patents US6041770A - Bi-metallic control device