Chimney cleaning apparatus
Patent 4454625 Issued on June 19, 1984. Estimated Expiration Date: 
May 24, 2002. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
May 24, 2002. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 1305543 1422001 1515410 2293847 3120020 InventorApplicationNo. 06/381214 filed on 05/24/1982US Classes:15/249.3Suspended by a taut member (e.g., wire, rope, chain, etc.)ExaminersPrimary: Roberts, Edward L.Attorney, Agent or FirmInternational ClassesF23J 3/00 (20060101)F23J 3/02 (20060101) AbstractA base frame is arranged to be supported at the top of a chimney and has a support arm which extends over the top of the chimney opening. A crank is provided on the support arm, and an elongated flexible member hangs from the crank whereby upon turning the crank the flexible member swings around inside the chimney to knock off collected substance. The crank is arranged to be driven by an operating rod extending to a remote area, such as to the ground, whereby operation of the crank can be accomplished from the ground. In a modification of the apparatus, an electric motor may be supported on the base frame for providing the drive for the crank.Field of SearchTank cleaners | |
