Eagle Industry Co., Ltd.

Takuji Matsuki

Masaru Nakamura

Hideyuki Inoue

Yoshihiro Teshima

Yasushi Fujiwara

Hiroshi Aoike

Hiroki Takeno

Masahide Shimada

Provided is a mechanical seal that ensures the flow rate of a cooling fluid, which is necessary to cool a slide seal surface, and that can prevent erosion from occurring. In the mechanical seal, the ratio between the depth and the width of each groove of a partial impeller is 2.0-5.0; the ratio of the distance between the grooves of the partial impeller to the width of a weir of a casing is 0.5-3.1; the ratio of the total length of the widths of the grooves of the partial impeller to the total length of the peripheral surface of the partial impeller, in which the grooves are formed, is 0.28-0.8; or the ratio of the length of the projected portion of the tip of each groove of the partial impeller to the width of a cooling liquid discharging groove of the casing is greater than 0 and less than or equal to 0.65.

Mechanical seal

A method of producing a diaphragm damperhaving a high pressure chambercomprised of two diaphragmswith flangeswelded together and charged inside with a high pressure gas. The diaphragmsare made of magnetically attractable thin metal sheets. A pair of jigsprovided to face each other inside the pressure vesselhold the diaphragmsby magnetic force. The pressure vesselis sealed and evacuated, then the pressure vesselis charged and pressurized by a mixed gas including helium. After this, the pair of jigsare made to approach each other to make the flangesof the pair of diaphragmscome into close contact. Inside the pressure vessel, the jigsare simultaneously rotated to rotate the pair of diaphragmsand a laser beam is fired at the flangesof the diaphragmsto weld the flangesover their entire circumferences.

Diaphragm damper and method of production and production apparatus of same

A pipe jointcomprises a fittingconnected with a hose, a flangepressingly holding the fittinginserted into a through holetoward a block, a boltfor fixing tightly the flangeto the block, a metal sealhaving 'C' cross section so as to seal a joined portion of a communication passageand a connection openingexternally, and a first and a second O-ringsso as to seal a contact portion of the fittingand the block. A projecting portionis formed on a lower faceof the flange, the projection portionis formed at an area opposite to an area where the insertion holeis formed with respect to a center axis of the through hole, the project portionprojects from other portion of the flange towards the block. A tip of the fittinginserted into the through holeprojects towards the blockfrom the lower faceof the flange

Pipe joint

Growing community of inventors

Tokyo, Japan

Takuji Matsuki