Method and apparatus for removing deflection from plastic pipes
Patent 4309128 Issued on January 5, 1982. Estimated Expiration Date: 
November 13, 2000. 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.
November 13, 2000. 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 Re23381 2184809 2229912 2522171 2601248 3113621 3123101 3294121 3543377 3602263 InventorApplicationNo. 06/206821 filed on 11/13/1980US Classes:405/184.3, Pipe splitting, breaking, or expanding138/97, REPAIRING405/156With forming or cutting of pipe or cableExaminersPrimary: Taylor, Dennis L.Attorney, Agent or FirmInternational ClassesE03F 3/00 (20060101)E03F 7/00 (20060101) E03F 3/06 (20060101) F16L 55/26 (20060101) AbstractMethod and apparatus for substantially reconstituting the internal diameter of sewer, water or drain line plastic pipes after being located in situ comprising a movable housing, sized preferably to at least 95 percent of the inside diameter of the pipe, and housing carried vibration means for causing such reconstitution of said pipe diameter substantially by virtue of vibration induced reallocation of the pipe encompassing earth or filler bed material. | |
