Manual pipe bender
Patent 7143629 Issued on December 5, 2006. Estimated Expiration Date: 
December 14, 2025. 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.
December 14, 2025. 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 1075837 1247729 1640426 2979976 3190105 3785190 3906778 Manually operable swivel tube bender Patent #: 4827755 InventorApplicationNo. 11302265 filed on 12/14/2005US Classes:72/459, With work-complementing tool-face adjacent to work-gripping clamp72/154, Including backed-up, travelling wiper (e.g., follow bar)72/217, Work between movable tool and pivot (e.g., sweep-arm bender)72/388, Cantilever bender72/458, Comprising lever manipulated to force work72/149By use of work-contacting wiper and moving, work-holding formExaminersPrimary: Jones, DavidAttorney, Agent or FirmInternational ClassesB21D 11/04B21D 7/04 AbstractThe manual pipe bender has a stationary handle, a head, a bending die, a bending lever, and a bending handle. The stationary handle has a distal end, and the head is attached to the stationary handle. The bending die has a bending surface and multiple ratchet teeth. The bending lever attaches the bending die rotatably to the head. The bending handle is attached to and rotates the bending die around the head and has a drive bracket that engages a selected ratchet tooth on the bending die to keep the handles from crossing. Consequently, bending acute angles in pipes is convenient.Field of SearchBy use of work-contacting wiper and moving, work-holding formIncluding backed-up, travelling wiper (e.g., follow bar) Work between movable tool and pivot (e.g., sweep-arm bender) About a fixed pivot Comprising lever manipulated to force work With work-complementing tool-face adjacent to work-gripping clamp Cantilever bender | |
