Underwater cutting tool
Patent 4477060 Issued on October 16, 1984. Estimated Expiration Date: 
June 13, 2003. 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.
June 13, 2003. 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 3507230 Cutting torch arrangement Underwater cutting rod Patent #: 4182947 InventorApplicationNo. 06/513115 filed on 06/13/1983US Classes:266/48MEANS FOR CUTTING SOLID METAL WITH HEAT, E.G., BLOWPIPESExaminersPrimary: Stallard, W.Attorney, Agent or FirmInternational ClassesB23K 7/10 (20060101)B23K 7/00 (20060101) B23K 7/08 (20060101) E21B 7/14 (20060101) Foreign Application Priority Data1981-10-20 DEAbstractAn underwater cutting tool for steel, concrete, or the like, comprising a tubular oxygen lance (10) adapted to be connected to an oxygen source (24, 25) and having a pistol grip-like handle (16).Prior to its first use the lance is sealed so as to be ignited safely under water. This seal (12) is adapted to be blasted off or fused by means of an igniter unit (14) which is operable under water, at the same time, firing the oxygen flowing out of the lance (10). The seal (12) preferably is formed by a plug of a material which is easily inflammable or contains such material and hermetically seals the free end of the lance (10).Field of SearchMEANS FOR CUTTING SOLID METAL WITH HEAT, E.G., BLOWPIPES | |
