Mu Ltd.

Seta, Japan
Seta, Japan

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Shimazu H.,Ibaraki University | Konosu S.,Ibaraki University | Tanaka Y.,Nippon Steel Techno Research | Yuga M.,Jfe Holdings | And 2 more authors.
Journal of Pressure Vessel Technology, Transactions of the ASME | Year: 2013

This paper presents the results of the research activities of the subcommittee on hydrogen embrittlement of the Japan Pressure Vessel Research Council (JPVRC). The combined effect of temper embrittlement and hydrogen embrittlement in Cr-Mo steels is discussed. It has been recognized that Cr-Mo steels used widely in the refining and petrochemical industry are quite susceptible to temper embrittlement. Although the synergistic relation between temper embrittlement and hydrogen embrittlement is a matter of major concern, studies regarding this subject are rarely encountered. Task group VIII (TG8) of the JPVRC conducted fracture toughness tests for three kinds of 2.25Cr-1Mo steels and 2.25Cr-1Mo-0.3 V steel. These steels were prepared by subjecting them to normalizing, tempering, and postweld heat treatments (PWHTs) which simulated actual conditions. Some specimens were embrittled by step cooling (Socal-1 treatment). It was found that the threshold for hydrogen-induced fracture was lowered when the specimen was exposed to pressurized hydrogen gas (15 MPa) for 48 h at 450 C and there was no marked indication of the synergistic action concerning this embrittlement. © 2013 by ASME .


Patent
Mu Ltd. | Date: 2012-09-03

Provided is a medical device including a self-propelled capsule endoscope that is propelled through the inside of a body by vibration of a fin portion and a capsule controller that controls self-propulsion of the capsule endoscope from the outside of the body, the medical device being capable of precisely controlling the moving direction of the capsule endoscope easily. This medical device (1) includes: a capsule endoscope (2) in which a magnet (21) having a magnetization direction in an axial direction is mounted and a fin portion (2b) is provided at a rear end in the axial direction of an endoscope main body (2a), and which can be self-propelled through the inside of a body; and a capsule controller (3) which controls self-propulsion of the capsule endoscope (2) from the outside of the body by generating a static magnetic field whose direction is controlled three-dimensionally, and an alternating magnetic field orthogonal to the static magnetic field. The capsule endoscope (2) is configured such that the capsule endoscope (2) rotates upon receiving the static magnetic field so that the magnetization direction of the magnet (21) is parallel to the direction of the static magnetic field and the fin portion (2b) vibrates by bending with movement of the magnet in response to the alternating magnetic field, whereby propulsive power in the axial direction is generated.


Patent
MU Ltd. | Date: 2016-01-27

Provided is a capsule endoscope including a capsule body, a fin portion, and a sack portion, the capsule endoscope being capable of moving easily even in a situation where the movement thereof is likely to be obstructed. This capsule endoscope 1 includes: a capsule body 3 including a forward imaging element that images a forward side and a backward imaging element that images a backward side; a fin portion 4 in which a magnet that is displaced in response to an alternating magnetic field is mounted and which vibrates by being elastically deformed by the displacement of the magnet; and a sack portion 5 to which a front end 4b of the fin portion 4 is bonded at a position shifted downward from an axial line of the capsule body 3, and which is attached to the capsule body 3 in such a way that a rear end side of the capsule body 3 is inserted into the sack portion 5 and the sack portion 5 is elastically deformed to make close contact with the periphery of the rear end side, the sack portion 5 being provided with an opening of a hollow portion near the front end of the fin portion 4. The fin portion 4 moves by vibrating in an up-down direction in a liquid medium.


Patent
MU Co. | Date: 2016-03-31

A mixing element in which spiral blade edge portions are disposed in a tube wall portion of a passage tube through which fluid flows and an opening section of the passage tube and the blade edge portions are joined to each other is provided. In an existing manufacturing method using a gas welding machine, when, for example, a mixing element having an inside diameter of 130 mm is to be manufactured, eight 90-degree rotation type spiral blades can be disposed at most. In a method for manufacturing the mixing element according to the present invention, it is possible to manufacture a mixing element including 10 or more blades by using a laser processor.


Patent
Mu Co. | Date: 2013-07-19

The present invention relates to a dumbwaiter system which is capable of enabling users to automatically purchase and received goods in a residential area by being installed in a multi-dwelling building, and ensures the safety of the users by reducing contact with strangers and preventing crimes. To this end, a multi-stage dumbwaiter system, according to one embodiment of the present invention, comprises: a dumbwaiter having a body of which the inside is vacant the sides can be opened, and a horizontal transfer device for carrying an object inside or outside; and a home case disposed on one side of the dumbwaiter, and having a body of which the inside is vacant and the sides can be opened and a home case transfer device for carrying an object inside or outside, wherein the dumbwaiter delivers an object to the home case or receives an object from the home case.


Patent
MU Co. | Date: 2016-06-28

A mixing element in which spiral blade edge portions are disposed in a tube wall portion of a passage tube through which fluid flows and an opening section of the passage tube and the blade edge portions are joined to each other is provided. In an existing manufacturing method using a gas welding machine, when, for example, a mixing element having an inside diameter of 130 mm is to be manufactured, eight 90-degree rotation type spiral blades can be disposed at most. In a method for manufacturing the mixing element according to the present invention, it is possible to manufacture a mixing element including 10 or more blades by using a laser processor.


Patent
Mu Ltd. | Date: 2014-06-13

Provided is a capsule endoscope including a capsule body, a fin portion, and a sack portion, the capsule endoscope being capable of moving easily even in a situation where the movement thereof is likely to be obstructed. This capsule endoscope 1 includes: a capsule body 3 including a forward imaging element that images a forward side and a backward imaging element that images a backward side; a fin portion 4 in which a magnet that is displaced in response to an alternating magnetic field is mounted and which vibrates by being elastically deformed by the displacement of the magnet; and a sack portion 5 to which a front end 4b of the fin portion 4 is bonded at a position shifted downward from an axial line of the capsule body 3, and which is attached to the capsule body 3 in such a way that a rear end side of the capsule body 3 is inserted into the sack portion 5 and the sack portion 5 is elastically deformed to make close contact with the periphery of the rear end side, the sack portion 5 being provided with an opening of a hollow portion near the front end of the fin portion 4. The fin portion 4 moves by vibrating in an up-down direction in a liquid medium.


Patent
MU Ltd. | Date: 2014-05-28

Provided is a medical device including a self-propelled capsule endoscope that is propelled through the inside of a body by vibration of a fin portion and a capsule controller that controls self-propulsion of the capsule endoscope from the outside of the body, the medical device being capable of precisely controlling the moving direction of the capsule endoscope easily. This medical device (1) includes: a capsule endoscope (2) in which a magnet (21) having a magnetization direction in an axial direction is mounted and a fin portion (2b) is provided at a rear end in the axial direction of an endoscope main body (2a), and which can be self-propelled through the inside of a body; and a capsule controller (3) which controls self-propulsion of the capsule endoscope (2) from the outside of the body by generating a static magnetic field whose direction is controlled three-dimensionally, and an alternating magnetic field orthogonal to the static magnetic field. The capsule endoscope (2) is configured such that the capsule endoscope (2) rotates upon receiving the static magnetic field so that the magnetization direction of the magnet (21) is parallel to the direction of the static magnetic field and the fin portion (2b) vibrates by bending with movement of the magnet in response to the alternating magnetic field, whereby propulsive power in the axial direction is generated.


Trademark
Mu Ltd. | Date: 2015-12-01

Self -propelling capsule endoscopes for medical use; medical apparatus and instruments for controlling self-propelling capsule endoscopes.


We have been developing the Self-Propelling Capsule Endoscope (SPCE) that allows for controllability from outside of the body and real-time observation. What kind of capsule endoscope (CE) is suitable for a controllable SPCE is unclear and a very critical point for clinical application. We compared observing ability of three kinds of SPCEs with different viewing angles and frame rates.Eleven buttons were sewed in an excised porcine stomach. Four examiners controlled the SPCE using PillCamSB2, -ESO2, and -COLON2 (Given Imaging Ltd., Israel), for 10 minutes each with the aim of detecting as many buttons and examining them as closely as possible. The ability to find lesions was assessed based on the number of detected buttons. The SPCE-performance score (SPS) was used to evaluate the ability to examine the lesions in detail.The SPCE-ESO2, -COLON2, and -SB2 detected 11 [interquartile range (IQR): 0], 10.5 (IQR, 0.5), and 8 (IQR, 1.0) buttons, respectively. The SPCE-ESO2 and -COLON2 had a significantly better ability to detect lesions than the -SB2 (p < 0.05). The SPCE-ESO2, -COLON2, and -SB2 had significantly different SPS values of 22 (IQR, 0), 16.5 (IQR, 1.5), and 14 (IQR, 1.0), respectively (p < 0.05 for all comparisons; SPCE-SB2 vs. -ESO2, -SB2 vs. -COLON2, and -ESO2 vs. -COLON2).PillCamESO2 is most suitable in different three CEs for SPCE for examining lesions in detail of the stomach.

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