G-C Dental Industrial Corp.

Mitsubishi Heavy Industries Limited

Gc Corporation

Other

Kazuo Hirota

Shoji Akahane

Kentaro Tomioka

Shingo Nishida

Kaori Okada

Fumiyuki Suzuki

Masaaki Katayama

Hiroshi Oshima

Haruyuki Kawahara

Ryoichi Kawakami

Masatsugu Monde

Satoshi Tosaki

Eiichi Yoshii

Shoji Takeda

Hiroaki Muramatsu

Makoto Iwasaki

Yoshimasa Suzuki

Hisashi Sato

Masaaki Kaneko

Makoto Nakajima

Kohei Yamamoto

Takashi Matsunaga

Hideyuki Morita

Shigeyuki Watanabe

Hideyuki Sakata

Naoki Ono

Hideki Yarimizu

Toshihiro Sekiguchi

Chikara Kurimura

Masaki Hata

Nobuki Uda

Toshio Ichikawa

Shigenobu Kusakai

Sueo Saito

Atsuhiro Todo

Kaori Matsunae

Kota Hosoya

Naoto Imajo

Hirokata Shimokobe

Yukiharu Kusayanagi

Tetsuya Arikawa

Toshifumi Nariai

Seinosuke Azuma

A steam valve according to at least one embodiment of the present disclosure, includes: a valve body that includes a steam flow path through which steam flows, and a valve seat disposed in the middle of the steam flow path and having an opening portion; and a stop valve that includes a valve stem which extends in an axial direction, where an axis extends, and is movable back and forth in the axial direction, and a first valve disc which is fixed to a distal end part of the valve stem and is abutted against the valve seat to close the steam flow path. The valve stem is partitioned into a first valve stem to which the first valve disc is fixed and a second valve stem different from the first valve stem.

Steam valve and power generation system

A measurement method for a steam valve according to at least one embodiment of the present disclosure, includes: a step of measuring acceleration of a valve stem when a slave valve is opened by driving the valve stem with an actuator from a fully closed state of a master valve and the slave valve; a step of detecting a timing at which the slave valve is fully opened, based on the measured acceleration of the valve stem; and a step of calculating an amount of movement of the valve stem from a reference position to a position where the slave valve is fully opened.

Measurement method for steam valve and measurement device for steam valve

The support structure of the present disclosure is a piping support structure that supports piping comprising: a header pipe extending in a first direction within a cross section of a duct and having an inlet formed therein through which a high-temperature fluid flows; and a plurality of nozzle pipes integrally provided with the header pipe, extending in a second direction orthogonal to the first direction, and arranged in the first direction. The support structure comprises: ridges protruding from surfaces on at least one side of the outer peripheral surfaces of the nozzle pipes in a third direction orthogonal to the first direction and the second direction; and a support member fixed to the duct and having formed therein a guide groove to which the ridge is fitted and which guides the ridge in the direction of heat extension of the header pipe and the nozzle pipes.

Piping support structure, intake duct, and gas turbine

A supporting force inspection device for inspecting a supporting force of a vibration suppression member interposed between bend portions of a plurality of heat transfer tubes of a steam generator includes: an acceleration sensor for detecting a vibration state of the bend portion; a sensor holding part disposed inside the heat transfer tube and configured to hold the acceleration sensor; and a vibration force generation part configured to generate a vibration force for vibrating the heat transfer tube along a plane in which a curvature circle of the bend portion exists. The vibration force generation part is configured to cooperate with the sensor holding part and vibrate the heat transfer tube along the plane in which the curvature circle exists.

Supporting force inspection device and supporting force inspection method

There is provided a contact force evaluation method for evaluating a contact force against a supporting member of a tube bundle positioned in a fluid and supported by the supporting member, including a contact force setting step of setting a contact force of the tube bundle, a probability density function calculation step of calculating a probability density function of a reaction force received by the supporting member from the tube bundle in response to a predetermined input, using a vibration analysis model of the tube bundle and the supporting member, a probability calculation step of calculating a probability that a reaction force equal to or higher than the set contact force occurs, based on the calculated probability density function, and an evaluation step of evaluating the set contact force, based on the calculated probability.

Contact force evaluation method

A vibration damping structure for a heat-transfer tube bundle including columns arranged at an interval and each composed of a plurality of heat-transfer tubes curved in a common plane and arranged in parallel to each other. The vibration damping structure includes a first vibration damping member and a second vibration damping member disposed between the columns so as to intersect the array direction of the columns. The first vibration damping member and the second vibration damping member are disposed at different positions in an axial direction of each heat-transfer tube, and thicknesses of the first vibration damping member and the second vibration damping member in the array direction are larger than an average value of a clearance between the columns under operation.

Vibration damping structure for heat-transfer tube bundle

An amphibious vehicle includes a vehicle body; a flap supported at a lower portion in a traveling direction of the vehicle body to be able to swing in a direction in which an upper edge portion approaches and separates from the vehicle body; a support column which has a fluid actuator capable of expanding and contracting in accordance with a pressure of a working fluid to a cylinder chamber, is connected to the flap in at least a first end portion in a longitudinal direction, and performs adjustment of a swinging angle of the flap by expansion and contraction of the fluid actuator; a power source which supplies the working fluid to the cylinder chamber; and a safety valve which communicates with the cylinder chamber, and opens when an internal pressure of the cylinder chamber becomes greater than a predetermined pressure to discharge the working fluid in the cylinder chamber.

Amphibious vehicle

An upper holeA and a lower holeB are provided at two positions, namely, upper and lower portions, of a side surface of a guide tube, and a thimble tubeis pressed against an inner circumferential surface of the guide tube, by a differential pressure between coolant inside and outside the upper holeA and the lower holeB. It is preferable that an upper pressure adjustment hole and a lower pressure adjustment hole are provided at two positions, namely, upper and lower portions, of a side surface of an upper core support column, and a coolant flowing into the guide tube from an upper end of the guide tube flows out to the outside from inside the guide tube through a gap between the thimble tube and the upper hole, and also flows out to the outside from inside the upper core support column through the upper pressure adjustment hole, and a coolant flowing into the guide tube from a lower end of the guide tube flows out to the outside from inside the guide tube through a gap between the thimble tube and the lower hole, and also flows out to the outside from inside the upper core support column through the lower pressure adjustment hole.

Structure for suppressing flow vibration of instrumentation guide tube

A dental glass ionomer cement composition is disclosed, containing a coloring matter, a color of which is specified such that an L* value, when expressed by an L*a*b* colorimetric system in a standard illuminant D , being 60 or less, and a content of the coloring matter being preferably from 0.1 to 5% by weight based on the whole of the composition, and when the dental glass ionomer cement composition according to the invention is used in a setting method of a dental glass ionomer cement that is a most generally used dental cement at present over a wide range of dental applications by means of irradiation with a light, it has an effect for further shortening the time of sensitization to water and the time of setting.

Dental glass ionomer cement composition

A glass powder for glass ionomer cement is disclosed, containing a glass powder for glass ionomer cement having a shape in which a major axis length is from 3 to 1,000 times a minor axis length, in a glass powder for glass ionomer cement. The glass powder for glass ionomer cement having a shape in which a major axis length is from 3 to 1,000 times a minor axis length is a fibrous glass having a minor axis length of from 0.1 to 100 &mgr;m and a major axis length of 500 &mgr;m or less, and its content is within a range of from 0.1 to 80% by weight, being enable to provide a glass ionomer cement set material having a high mechanical strength, particularly bending strength and tensile strength.

Glass powder for glass ionomer cement

A method for setting a dental glass ionomer cement by means of irradiation with a light to accelerateinitial setting, the cement comprising a fluoroaluminosilicate glass powder, a polycarboxylic acid and water, is disclosed. Further, the light to be irradiated in the method for setting the dental glass ionomer cement is preferably a light having a wavelength in the range of from 320 to 3,000 nm, and the irradiation intensity and irradiation time of the light are preferably from 200 to 3,000 mW/cm,and from 1 to 180 seconds, respectively. According to the method for setting the dental glass ionomer cement of this invention, the time for sensitization to water and the initial setting time can be shortened, without necessity of particularly performing an operation for preventing the sensitization to water with a varnish or the like.

Method for setting dental glass ionomer cement

Dental adhesive kit

A dental filling resin composition is disclosed, comprising: a reaction product between an aluminosilicate glass powder containing at least one element selected from Ca, Sr, and Ra and an organic acid containing one or more carboxyl groups in one molecule thereof, a methanol-insoluble polymer, a monomer containing at least one unsaturated double bond and having no acidic group, and a polymerization initiator, and optionally a filler. The dental filling resin composition of the invention has not only superior mechanical characteristics and esthetics but also an ability to release a fluorine ion and therefore, can be suitably used for a wide variety of clinical applications such as filling restoration of tooth, core construction, or sealing of pit and fissure.

Dental filling resin composition

A dental glass ionomer cement composition comprises:

Dental glass ionomer cement compositions

A fluoroaluminosilicate glass powder for dental glass ionomer cements has a specific gravity of 2.4 to 3.5 and a mean particle size of 0.02 to 10 .mu.m, contains in its components 20 to 50% by weight of SiO.sub.2, 20 to 40% by weight of Al.sub.2 O.sub.3, 15 to 40% by weight of SrO, 1 to 20% by weight of F.sub.2 and 0 to 15% by weight of P.sub.2 O.sub.5 on the converted oxide basis, and is substantially free from alkali metal ions such as Li, Na, K, Rb and Cs ions, and Be, Mg (and Ca) and Ba ions of alkali earth metal ions. For further improvements in physical properties, 100 parts by weight of the glass powder are surface-treated with 0.01 to 5 parts by weight of an acid and/or a fluoride.

Glass powders for dental glass ionomer cements

Growing community of inventors

Tokyo, Japan

Kazuo Hirota