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Uraki; Keiichi
Hitachi, JP
No. of patents:

Patent Number Title Of Patent Date Issued
5977515 Underwater laser processing device including chamber with partitioning wall November 2, 1999
An underwater laser processing system has a laser torch; a laser torch driving mechanism for changing a laser emission position of the laser torch; and a chamber with one end opened to an external environment, which contains the laser torch; wherein a partitioning wall for preventing
5674419 Method for weld repairing of structures in nuclear reactors October 7, 1997
Disclosed is a highly reliable weld repairing method to repair a crack defect in structures and apparatus inside pressure vessels of nuclear reactors, while preventing generation of new crack defects in the structures and apparatus during the repairing. These structures and apparatus
5654992 Method of repairing structural materials of nuclear reactor internals and apparatus therefor August 5, 1997
A neutron-irradiated structural material having a defect in a nuclear reactor internals is repaired by covering the structural material to be repaired with a plate to cover over a portion thereof having the defect, and then welding the plate and the structural material by locally applyin
5305361 Method of and apparatus for water-jet peening April 19, 1994
A water jet peening method in which a pressurized water jet flow containing cavities is jetted through a nozzle having a velocity increasing orifice portion and a horn-like jetting hole formed continuously with the velocity increasing orifice portion to impinge against a surface of a met

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