Hitachi, Ltd.

Hitachi Construction Machinery Co., Ltd.

Hitachi Metals, Ltd.

Hitachi Seiko, Ltd.

Hitachi Electronics, Ltd.

Kuninori Imai

Takeji Shiokawa

Chikakazu Ninomiya

Mitsuo Miyamoto

Mitsuya Mikawa

Hideaki Sasaki

Isao Ishikawa

Shigeo Kato

Shinji Tanaka

Kazuo Sato

Hiroshi Kanda

Shinichi Kazui

Akira Masaki

Minoru Yamada

Keiichirou Nakanishi

Morio Tamura

Kazuyoshi Hatano

Hisayoshi Hashimoto

Harumasa Onozato

Kiyoshi Tanaka

Fujio Sato

Soji Takahashi

Ken Ichiryuu

Takao Kawanuma

Kenji Morita

Noriyuki Kumasaka

Takahiro Daikoku

Shigekazu Otomo

Fumiyuki Kobayashi

Takeo Yamashita

Takashi Nishida

Teruo Umehara

Masakazu Yamamoto

Takao Terabayashi

Kenichi Okada

Katuaki Chiba

Takeshi Tajima

Yasuaki Horiuchi

Hiroyuki Ogino

Masamoto Akeyama

Toshimichi Ikeda

Seiki Takedomi

Kyoko Amemiya

Kan Otake

Takao Oguro

Akihiko Higurashi

A fastener structure for fastening a first member and a second member using a taper implant having a threaded hole therein. The taper implant has a frusto-conical outer surface, a projecting portion connected to a larger diameter end and a threaded hole passing therethrough. The first member has a wall portion with a tapered hole extending therethrough and a counterbored portion adjacent a larger diameter end to receive the projection portion of the taper implant. The taper implant is inserted into the hole of the first member and held therein by frictional contact. The second member has a wall portion with a hole therethrough. The second member is positioned in contact with the first member and the two members are fastened together by inserting a male screw through the hole of the second member and threading the male screw into engagement with the threaded hole of the taper implant.

Fastening structure using a taper implant

A method of fastening a first member and a second member using a taper implant having a threaded hole therein includes providing a taper implant having a frusto-conical outer surface, a projecting portion connected to a larger diameter end and a threaded hole passing therethrough and providing a first member having a wall portion with a tapered hole extending therethrough and having a counterbored portion adjacent a larger diameter end to receive the projection portion of the taper implant. The taper implant is inserted into the hole of the first member and held therein by frictional contact. A second member is provided having a wall portion with a hole therethrough. The second member is positioned in contact with the first member and the two members are fastened together by inserting a male screw through the hole of the second member and threading the male screw into engagement with the threaded hole of the taper implant.

Taper implant and a screw-fastening structure using a taper implant with female threads

A method of fixing a taper implant to a receiving member includes providing a taper implant having a frusto-conical outer surface, a projecting portion connected to a larger diameter end and a smaller diameter end. A receiving member is provided which has a wall portion with a passing-through hole therein with at least a portion of the passing-through hole being tapered to form a frusto-conical shape whereby the taper portion has a larger diameter end and a smaller diameter end and the passing through hole has a cylindrical counterbored portion adjacent to the larger diameter end in which the projecting portion of the taper implant is received. A taper rate of the taper portion of the passing through hole is the same as a taper rate of the taper portion of the taper implant. The larger diameter end of the taper portion of the passing through hole has a diameter which is smaller than a diameter of the larger end of the taper portion of the taper implant whereby there is a tight-fit allowance when the taper implant is inserted into the passing through hole. The taper implant is fixed in the passing through hole of the receiving member by the outer surface of the taper portion of the taper implant being in contact with a surface of the taper portion of the passing through hole by applying a force to the taper implant whereby a friction force is generated between the taper portion of the taper implant and the wall portion.

Method for fixing a taper implant to a receiving member

A taper implant includes a taper portion having an outer surface frust-conical in shape. A flange portion is formed at an outermost end of the taper portion on the larger-diameter side to project outwardly with respect to the taper portion and having a flat surface situated perpendicularly to the axial direction of the taper portion, and female threads serving as a fit portion extending in the axial direction of the taper portion. A hole taper portion and a hole step portion are drilled at the same time to bore a hole in one of the members to be fastened, and the taper implant is driven into the hole, thereby providing a screw fastening structure for the fastened members.

A balance adjustment method of an end mill for increasing the accuracy of the machined surface and also for lengthening the tool lifetime, in which mass unbalance between an end gash part of a primary cutting edge and an end gash part of a secondary cutting edge of the end mill having asymmetric cutting parts is balanced by decreasing an end gash angle, an end gash part, a clearance angle or a corner of tooth face of the secondary cutting edge.

Balance adjustment method of end mill

A grinding method and a grinding machine of reduced grinding resistance, in which letting f [mm] denote the diamond particle size of a diamond grindstone, V [m/min] denote the peripheral speed of the diamond grindstone, and f [m/min] denote the feed speed of a workpiece made of Aluminum nitride ceramic, the peripheral speed of the diamond grindstone and the feed speed of the workpiece are set so as to satisfy V.gtoreq.35 .phi.+2000 and V/f.gtoreq.70 .phi.+800.

Grinding method and grinding machine

A rotating drum for use in a magnetic recording system. A magnetic head is mounted on the rotating drum, and a magnetic recording medium is wound on the rotating drum, and the rotating drum is rotated so as to read and write signals. Alternatively, the magnetic recording medium is mounted on the rotating drum, and signals are read and written by a magnetic head fixed exteriorly of the rotating drum. The rotating drum has at least one opening or notch in a magnetic recording medium-winding surface thereof. In order to restrain the deformation of the rotating drum during the rotation thereof, the center of gravity of the drum is disposed substantially in registry with the axis of rotation of the drum.

Rotating drum having a center of gravity in registry with an axis of

A multi-channel module with a plurality of chips is mounted on a multilayer circuit board and has a simple and highly reliable structure cooling system for cooling the heat generated by the chips consuming a large amount of electric power. The cooling system uses in the horizontal direction a coolant supply pipe having straight tube sections and flexible bellows sections alternately disposed in the axial direction of the pipe. The straight tube sections of the aforesaid coolant supply pipe are brought into contact with the upper faces of the chips by a spring force so as to cool continuously the plurality of chips with the coolant flowing in one coolant supply pipe thereby providing a simply structured cooling system for chips. Such a structured cooling system enables the collective assembly of cooling parts for a plurality of chips with only a small number of parts and produces highly reliable effects thereby being able to implement the miniaturization of a main frame computer.

Multi-chip-module

A linear motor comprising a center yoke made of a ferromagnetic material; outer yokes made of a ferromagnetic material, having permanent magnets, each having magnetic poles on the inner and outer surfaces thereof and fixed to the inner surface of the outer yokes, and disposed outside the center yoke with both ends thereof being magnetically coupled; and a movable member having coils wound on the outer circumference thereof and axially movably disposed in a gap between the center yoke and the outer yokes, in which recesses are provided on the opposing surfaces of the center yoke and the movable member, and a static-pressure gas bearing is formed by providing an air intake vent connecting to these recesses.

Linear motor

An ultrasonic probe comprising an acoustic lens (20) having a concave lens surface (21) formed on one side of a lens body, and a piezoelectric transducer (23) disposed on the other side of the acoustic lens, ultrasonic waves generated by applying voltage to the piezoelectric transducer being focused through the lens surface to detect the reflected waves of the ultrasonic waves from a sample (26) by the piezoelectric transducer for obtaining information about the surface or interior of the sample. The lens surface (21) of the acoustic lens (20) is defined by an etch profile (15) formed by etching a substrate material (11) which makes up the lens body.

Ultrasonic probe

Ultrasonic probe and manufacture method for same

A slide table includes an inner member, an outer member fitted at least partly over the inner member, air bearings provided between the inner and outer members, and a motor means having a coil connected to the outer member to drive the same.

Slide table

This invention concerns a cooling module for integrated circuit chips, characterized in that it is provided with cooling members through which a coolant circulates, and which are connected directly, or via insulating plates, to a plurality of integrated circuit chips mounted on a wiring substrate, and pipes which introduce the coolant into the cooling members and which have a resiliency which is high enough to enable the pipes to expand and contract in the direction perpendicular to the wiring substrate.

Cooling module for integrated circuit chips

A cooling module for integrated circuit chips comprising a plurality of integrated circuit chips mounted on a wiring substrate, cooling members respectively provided for integrated circuit chips, each of the cooling members having therein space for circulating the coolant, and flexible pipes connected to respective cooling members, the coolant being caused to flow into or out of said space of said cooling member through the flexible pipes in order to remove heat from the integrated circuit chip.

In order to provide a method of producing magnetron anode at a good mass-produceability, according to the invention, so-called straight type steel cylinder blank the inner peripheral surface of which is not tapered is used and, at the same time, the step of quench-hardening of the steel cylinder blank is omitted. After fitting a copper block to the inside of the straight type steel cylinder blank which has not been quenched, both members are compacted to each other. Then, a press working is effected on the copper blank such that the steel cylinder blank and a back-up punch are forced to move relatively to each other, when a press-working shaping punch is forced into the copper block, thereby to form a copper anode. In order to avoid the bursting of the steel cylinder blank, the press work on the copper block is effected at a temperature of 200.degree. to 650.degree. C.

Method of producing magnetron anode

Growing community of inventors

Kanagawa, Japan

Kuninori Imai