Ntn Corporation

Fukui Byora Co., Ltd.

Other

Tohoku Ricoh Co., Ltd.

Natsuhiko Mori

Kazuo Okamura

Yasuhiro Yamamoto

Hiroyuki Noda

Isao Komori

Makoto Shiranami

Tetsuya Kurimura

Masaharu Hori

Nobuyoshi Yamashita

Tomokazu Sonozaki

Fuminori Satoji

Toshiyuki Mizutani

Katsumi Nagano

Yoshinori Ito

Yoshinobu Akamatsu

Masatoshi Mizutani

Kimihiko Bito

Tatsuya Hayashi

Katsuo Shibahara

Koji Yamagata

Yoshihiko Oeda

Takeshi Shimazaki

Wei Shin Sim

Tatsuro Sugiyama

Tsugito Nakazeki

Shinji Miyazaki

Fuyuki Ito

Masakazu Hirata

Mika Kohara

Yasuyuki Watanabe

Jun Hirade

Takuji Harano

Noriyuki Kadowaki

Masafumi Okuma

Kenichi Mitani

Kiyotaka Kusunoki

Tomoya Kawai

Takahiro Okuno

Ikuo Uemoto

Hajime Asada

Takashi Minami

Makoto Endo

Toshihiko Tanaka

Toshiaki Niwa

Kimihiko Hajota

Makoto Jinnou

Toshiyuki Mizytani

Kazuhiko Koseki

Hironori Itsusaki

Hideaki Kubota

Keiji Nagasaki

Masahiro Makino

Provided is a sintered bearing (), including 3 to 12% by mass of aluminum, 0.05 to 0.5% by mass of phosphorus, and the balance including copper as a main component, and inevitable impurities, the sintered bearing () having a structure in which an aluminum-copper alloy is sintered with a sintering aid added to raw material powder, a pore (db, do) in a surface layer portion of the sintered bearing () being formed smaller than an internal pore (di).

Sintered bearing and manufacturing method for same

A vehicle-mounted fin type antenna deviceincludes a plurality of antenna unitsto, a circuit boardelectrically connected to the plurality of antenna unitsto, and a radomeaccommodating the plurality of antenna unitstoand the circuit boardin an inside of the radome. The radomeis formed of a resin material that contains a crystalline resin as a base resin and has a deflection temperature under load of 100&#xb0; C. or more.

Cover and vehicle-mounted fin type antenna device

A battery checker is provided with: voltage application unit configured to apply an AC voltage to a battery to be measured; ripple voltage measurement unit configured to measure a ripple voltage contained in a terminal voltage of the battery; and electric power storage level detection unit configured to detect an electric power storage level of the battery by comparing the measured ripple voltage with a set reference. The voltage application unit includes a transformer that transforms voltage for an alternating current of an AC power supply such as a commercial AC power supply, and an output circuit that applies, to the battery, an alternating current with transformed voltage.

Battery checker

The present invention provides a magnetic core which can be produced with improved productivity without increasing a material cost and has required magnetic and mechanical properties and a process for producing the same. The magnetic core is produced by compression molding and thereafter thermally hardening iron-based soft magnetic powder having resin films formed on surfaces of particles thereof. The resin film is an uncured resin film formed by dry mixing the iron-based soft magnetic powder and epoxy resin containing a latent curing agent with each other at a temperature not less than a softening temperature of the epoxy resin and less than a thermal curing starting temperature thereof. The iron-based soft magnetic powder having the resin films formed on the surfaces of the particles thereof is compression molded by using a die to produce a compression molded body. The compression molded body having the resin films formed on the surfaces of the particles thereof is thermally hardened at a temperature not less than the thermal curing starting temperature of the epoxy resin.

Magnetic core and process for producing same

Provided is a chip antenna (), including: an antenna pattern (); and a base body (), which has a hexahedral shape, the antenna pattern () including: an antenna part (), which is held on an upper surface of the base body (); and a plurality of terminal parts (), which are held on a lower surface of the base body (), each of the plurality of terminal parts () being soldered to a circuit board (), in which the antenna pattern () further includes a band-shaped protruding part (), which extends in a long-side direction of the antenna part (), and is embedded in the base body (), and the band-shaped protruding part () is provided at least along a range of each of two long sides of the antenna part () excluding a range in which the plurality of terminal parts () are arranged.

Chip antenna

This power transmission device is connected between an AC wiring system connected to an AC power supply, and a DC power supply, and transmits power from the DC power supply to the AC wiring system. The power transmission device includes an AC power supply voltage signal generator, a power converter, a DC voltage conversion unit, a switching element, and a switch open/close signal generator. The switch open/close signal generator includes: a control signal generation unit to generate a control signal formed from a pulse signal; and a pulse width determination unit to receive the control signal and generate a delayed signal obtained by delaying rising of the control signal, and when the delayed signal becomes a value corresponding to a magnitude of voltage of the AC power supply voltage signal, cause the control signal to fall, thereby making the control signal into the switch open/close signal.

Power transmission device

Provided is a waveguide tube slot antenna (A), including: a waveguide tube () having a transverse section having a rectangular shape in each part of a waveguide () in an extending direction thereof; and a plurality of radiating slots () arranged in the waveguide tube () at predetermined intervals, in which: the waveguide tube () includes a first waveguide tube forming member () and a second waveguide tube forming member () each having the transverse section having a shape with an end, the first waveguide tube forming member () and the second waveguide tube forming member () being configured to define the waveguide () by being coupled to each other; and the first waveguide tube forming member () is formed to have a flat shape and includes the plurality of radiating slots ().

Waveguide slot antenna and warning system using same

Provided is a waveguide tube slot antenna () including: a plurality of waveguides () arranged in parallel with each other; a plurality of radiating slots () formed along each of the plurality of waveguides (); and a plurality of waveguide tubes () connected in parallel with each other, in which the plurality of waveguide tubes () each include a first waveguide tube forming member () and a second waveguide tube forming member () each having a transverse section having a shape with an end, the first waveguide tube forming member and the second waveguide tube forming member being configured to define one of the plurality of waveguides () by being connected to each other.

Waveguide tube slot antenna and wireless device provided therewith

After a three-dimensional antenna pattern () is formed by bending a conductive plate, the three-dimensional antenna pattern () thus bent is supplied in an injection molding die set as an insert component and a base () is formed by injection molding of a resin. With this, a chip antenna () comprising the three-dimensional antenna pattern () can be formed easier as comparison to a case where the antenna pattern is formed over a plurality of surfaces by printing and the like.

Chip antenna and manufacturing method thereof

With use of a fine copper-based powder, specifically a copper-based powder that contains particles each having a diameter of 45 &#x3bc;m or less by 80 weight % or more, an air permeability can be significantly reduced. When this copper-based powder is used, a sintered metal can be easily formed to contain copper by 40% or less (contain iron by 60% or more) to enhance abrasion resistance, and to have an oil permeability of 1.00 g/10 min or less to increase an oil film formation rate.

Sintered bearing

Providing a fluid dynamic bearing device, wherein the outer member comprises a member formed by a pressing process on a plate member, the radial bearing surface and at least the one of the thrust bearing surfaces of the outer member being formed by the pressing process, and wherein at least a part of the inner member, which forms the radial bearing surface and the thrust bearing surfaces of the inner member, is made of a sintered metal.

Fluid dynamic bearing device and assembly method for same

A constant-velocity universal joint includes an outer joint member; an inner joint member arranged in an inside of the outer joint member; and torque transmitting members. At least one of the outer joint member and the inner joint member comprises track grooves that are engaged with rolling surfaces of the torque transmitting members. At least one of the components of the constant-velocity universal joint is formed of a metal sintered compact. The metal sintered compact has a relative density of 80% or more and less than 100%. The metal sintered compact comprises a hardened layer formed on a surface thereof through heat treatment. Among the components each formed of the metal sintered compact, a component having a ring shape is subjected to a cold rolling process.

Constant velocity universal joint

A bearing capable of satisfying demands for cost reduction and further quietness, and stably maintaining high support accuracy. A sliding bearing () includes an inner member () having a mounting surface () with respect to a rotary shaft (), and an outer member () being arranged on a radially outer side of the inner member (). A radial bearing gap is formed between an outer peripheral surface () of the inner member () and an inner peripheral surface () of the outer member (), and a lubricating oil is interposed in the radial bearing gap. Further, between the inner member () and the outer member (), sealing gaps (S, S) for maintaining an oil level of the lubricating oil on both axial sides of the radial bearing gap are formed. At least a part of the mounting surface () of the inner member () is made of a metal.

Slide bearing, slide bearing unit with same, and motor with the bearing unit

A shaft material integrally having a shaft portion and a flange portion is formed by a forging process. The end face of the shaft portion of the shaft material and the end face of the flange portion on the opposite side of the shaft portion are ground relative to the corrected face, and the outer circumferential surface of the shaft material is ground relative to the end faces. This renders the cylindricity of the radial bearing faces formed on the outer periphery of the shaft portion of the produced shaft member to be 3 &#x3bc;m or lower. Moreover, a shaft material integrally having the shaft portion and flange portion is formed, while simultaneously thrust hydrodynamic groove regions are formed on both end faces of the flange portion. After the forging process, radial hydrodynamic groove regions are formed on the outer circumferential surface of the shaft portion.

Method for producing shaft member for hydrodynamic bearing apparatus

It is an object of the present invention to provide a bearing member having a highly accurate dynamic pressure generating portion stably at low cost. Dynamic pressure grooves () and () are formed as the dynamic pressure generating portions on an inner circumferential surface of the electroforming portion () by an electroforming process, and injection molding is performed by using a resin while inserting the electroforming portion (), thereby forming a bearing member (). A shaft member () is inserted into an inner circumference of the bearing member.

Fluid dynamic bearing device

Growing community of inventors

Kuwana, Japan

Natsuhiko Mori