Hitachi, Ltd.

Yuuji Yoshitomi

Takashi Naganawa

Shigeo Ohashi

Yoshihiro Kondo

Tsuyoshi Nakagawa

Rintaro Minamitani

Hajime Katou

Masato Nakanishi

Shinji Matsushita

Hiromi Inaba

Masatsugu Arai

Ichiro Nakamura

Hiroshi Nagase

Akiomi Kohno

Tamio Ishihara

Kazuaki Yokoi

Yutaka Sakurai

Toshio Saitoh

Takashi Teramoto

Tatsuo Seki

Shota Iwakura

Kensuke Kato

An elevator in which the sheave diameter is reduced and the attendant lowering of the rope life and strength is suppressed to secure safety and reliability. To this end, a rope is used in which a plurality of element wires constituting the wire rope are each covered with resin material and the whole wire rope is covered with resin material, thereby reducing the wear due to slippage between the element wires and the wear due to contact with the sheave, which wear occurs when the rope is entrained around the sheave. When the elevator sheave diameter is reduced, a worried lowering of the rope life can be suppressed or the rope life can be improved. Thus, it is possible to achieve reduction of size and weight of equipment including motors and hoists, installation space saving for elevators, improved safety and reliability of the system by virtue of the increased rope life.

Rope and elevator using the same

An electronic apparatus includes a case mounting a semiconductor element within an inside thereof, a heat-receiving member thermally connected with the semiconductor element, a heat-radiation member disposed on an inner side surface of the casing, and a liquid driver for driving a liquid coolant between the heat-radiation member and the heat-receiving member. The apparatus further includes a tank accumulating the liquid coolant therein with at least a predetermined volume of the coolant to delimit a coolant surface within the tank, wherein the tank, the heat-radiation member and the heat-receiving member are connected with tubes, and a suction end portion of a suction pipe connected into the tank is located at a position which is always below the coolant surface irrespective of change of position of the tank.

Electronic apparatus

In the structure of an electronic apparatus, in which cooling of an heat-generating element is conducted through circulation of a liquid, in particular, for providing a liquid-cooling structure of being high in reliability, while also considering safety and assembling property into the consideration, wherein a water-cooling jacket is thermally connected with a heat-generating element , while thermally connecting a heat-radiation pipe with a heat-radiation plate provided on a rear surface of a display , wherein a coolant liquid is circulated between the water-cooling jacket and the heat-radiation pipe , by means of a liquid driving device . The heat-radiation pipe is connected onto a whole area of the heat-radiation plate, like crawling thereupon. A tank is provided in an upper portion of the heat-radiation plate , and is connected with the heat-radiation pipe

Liquid circulation cooling system for electronic apparatus

In an electronic equipment or apparatus, having water-cooling structure able to circulate/supply a cooling liquid with stability, for dealing with an increase of heat-generation of a heat-generating element, accompanying with an increase of processing performances, a pipe, which is located at a side where the cooling water flows out from a tank building up the water-cooling system, is extended up to the position of a center of the tank and disposed therein. Also, two (2) pieces of plates are provided for dividing the vicinity of an inlet portion of a pipe, through which the cooling water flows out, within the tank, and further, when injecting the cooling water into the tank, an injection jig for the cooling water is used, which has a connector portion with the tank.

An electromagnetic flowmeter for measuring the flow rate of a fluid. The flowmeter has a measuring tube made of ceramics and defining a fluid passage therein for the fluid, electrodes having ends exposed to an interior of the measuring tube through holes which are formed in a wall of the measuring tube, a magnetic field generating device disposed around the electrodes, and a case encasing the measuring tube, the electrodes and the magnetic field generating means. A ratio t/R between a wall thickness t and a mean radius R of the measuring tube is determined such that stress generated in the measuring tube by the fluid in the measuring tube does not exceed the rupture stress of the measuring tube. The measuring tube can have flanges on both axial ends thereof, a radial height of the flange from an outer surface of the measuring tube is not greater than the wall thickness of the tube when the tube is made of Al.sub.2 O.sub.3 and not greater than a value three times as large as the tube wall thickness when the tube is made of Si.sub.3 N.sub.4. The electrodes may be made from Ni or an Ni alloy and are secured to the measuring tube by press-fitting into holes formed in the tube wall or by jointing. The electromagnetic flowmeter thus obtained exhibits high strength and reliability and high degree of gas-tightness in the tube portions around the electrodes.

Electromagnetic flowmeter

A method of relieving residual stress in a metal pipe comprises the steps of applying, by using a pressure medium, a low pressure to an interior of the metal pipe placed in dies, and applying, while preventing the buckling, an axial compression load to the pipe so as to effect a uniform plastic deformation of the entire metal pipe while maintaining the desired shape of the pipe, thereby relieving the residual stress in the metal pipe.

Method of relieving residual stress in metal pipe

Growing community of inventors

Tsuchiura, Japan

Yuuji Yoshitomi