Hitachi, Ltd.

Hitachi Setsubi Engineering Co., Ltd.

Other

Wataru Sagawa

Hiroshi Akiyama

Tsutomu Yamashita

Hidehito Asano

Yutaka Muramatsu

Tasuku Shimizu

Tsukasa Ikegami

Isao Sugihara

Disclosed is a medical particle irradiation apparatus comprising a rotating gantryincluding an irradiation unitemitting particle beams; an annular framelocated within and supported by the rotating gantrysuch that it can rotate relative to the rotating gantry; an annular framefixedly located opposite the annular frame; an anti-corotation mechanismbeing in contact with both the annular framesandto prevent the annular framefrom rotating together with the rotating gantryduring rotation of the rotating gantry; and a flexible moving floorinterposed between the annular framesand, the flexible moving floorbeing engaged with the annular framesandin such a manner as to move freely such that its bottom is substantially level and that it moves as the rotating gantry rotates.

Medical particle irradiation apparatus

Disclosed is a medical particle irradiation apparatus comprising a rotating gantry including an irradiation unit emitting particle beams; an annular frame located within and supported by the rotating gantry such that it can rotate relative to the rotating gantry ; an annular frame fixedly located opposite the annular frame ; an anti-corotation mechanism being in contact with both the annular frames and to prevent the annular frame from rotating together with the rotating gantry during rotation of the rotating gantry ; and a flexible moving floor interposed between the annular frames and , the flexible moving floor being engaged with the annular frames and in such a manner as to move freely such that its bottom is substantially level and that it moves as the rotating gantry rotates.

Herein disclosed are a method of heat-treating a weld zone of a piping system, in which the outer wall of a pipe is heated by means of a heating coil, while a coolant is present in said pipe, to establish a temperature difference between the inner and outer walls of said pipe thereby to prevent the weld zone of said pipe from corroding and cracking due to stress, and a heating coil therefor. The aforementioned heating coil is wound on the parent tube and the pipe welding desk generally concentrically thereof thereby to heat substantially uniformly all over the region of said weld zone.

Heat-treating method of weld portion of piping system and heating coil

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Mito, Japan

Wataru Sagawa