Method for unclogging a pipe carrying dangerous substances
Patent 5198037 Issued on March 30, 1993. Estimated Expiration Date: 
May 14, 2011. 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 14, 2011. 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 2041209 2758917 3711993 Device for drilling a hole in the side wall of a bore hole Method for cleaning the interior of tubes Fluid jet apparatus and method for cleaning tubular components Foundation drain cleaning apparatus and method Process and apparatus for treating articles of substantial thickness Patent #: 5007968 InventorsAssigneeApplicationNo. 699910 filed on 05/14/1991US Classes:134/22.11, Pipe, tubing, hose, or conduit134/22.12, With pressurized fluid or fluid manipulation134/24Movable fluid applying nozzle and/or with plugging or sealing of work passage or openingExaminersPrimary: Morris, TheodoreAssistant: Chaudhry, Saeed Attorney, Agent or FirmForeign Patent References
International ClassB08B 009/02Foreign Application Priority Data1990-05-18 FRAbstractSo as to unclog a pipe (16) carrying dangerous and accessible substrances after the removal of a movable member (24, 26), this member is replaced by a guiding member (42), a hydraulic shuttle (66) then being introduced into this guiding member, this shuttle being connected to a high pressure hydraulic source (70) through a box (56) equipped with means for washing the shuttle at the time the latter is withdrawn and means for recovering effluent. The shuttle is then conditioned in a winder connected directly on the box (56). | |
