Inventors list

Assignees list

Classification tree browser

Top 100 Inventors

Top 100 Assignees


Takasugi, JP

Hajime Takasugi, Yokohama JP

Patent application numberDescriptionPublished
20090313431Disk Array Recording Apparatus and Recording Control Method Thereof - The present invention provides a disk array recording apparatus that is composed of a plurality of hard disk drives (HDDs) and capable of unfailingly decreasing the startup time required between power application and recording operation initiation. When three out of four HDDs 12-17-2009

Hidenori Takasugi, Aichi JP

Patent application numberDescriptionPublished
20120126631WIRELESS POWER TRANSMISSION SYSTEM - It is desired to provide a wireless power transmission system which it is possible to more surely prevent the leakage of a microwave. A wireless power transmission system includes: a power transmission antenna configured to output a microwave from an output plane; a power reception antenna arranged in a position opposing to said output plane of said power transmission antenna in power transmission and configured to receive the microwave outputted from said power transmission antenna by an input plane; and a shield section configured to electromagnetically shield a space between said power transmission antenna and said power reception antenna from an external space by a plurality of outer circumference coil springs provided in an area which surrounds said output plane of said power transmission antenna. The coil spring bends along a convex section compared with a wire member when there is the convex section in a hit part. Therefore, good electromagnetic wave shield efficiency is obtained.05-24-2012

Hideto Takasugi, Kawasaki-Shi JP

Patent application numberDescriptionPublished
20080272157Sliding Nozzle Device and Pouring Device - A fixed plate (11-06-2008

Hiroshi Takasugi, Saitama-Shi JP

Patent application numberDescriptionPublished
20130065896FUSED IMIDAZOLE DERIVATIVE - Provided is a novel compound which shows an antagonistic effect against T-type calcium channels, and is useful as a pharmaceutical product.03-14-2013

Hisashi Takasugi, Sakai-Shi JP

Patent application numberDescriptionPublished
20090054464HDAC INHIBITOR - Compounds having the formula (I):02-26-2009

Katsuji Takasugi, Gunma JP

Patent application numberDescriptionPublished
20100147017REFRIGERATION APPARATUS - There is disclosed a refrigeration apparatus capable of decreasing a load on a compressor and improving an operation efficiency. According to the present invention, in a refrigeration apparatus 06-17-2010

Katsuji Takasugi, Ota-Shi Gunma JP

Patent application numberDescriptionPublished
20090113917REFRIGERATION APPARATUS - There is disclosed a refrigeration apparatus including a cascade heat exchanger and capable of reducing the depth dimension of the apparatus itself without being influenced by the thickness dimension of an insulating material for covering the cascade heat exchanger, so that the apparatus can easily be carried indoors through a usual carrying entrance. In a refrigeration apparatus 05-07-2009
20090126389REFRIGERATION APPARATUS - There is disclosed a refrigeration apparatus capable of quickly collecting, in an expansion tank, a refrigerant in a refrigerant circuit during the stop of a compressor and capable of decreasing a load to be applied to the compressor during restart. A refrigeration apparatus 05-21-2009

Katsunori Takasugi, Odate-Shi JP

Patent application numberDescriptionPublished
20080275421Label, Medicine Bag and Storage Container with the Label - It is an object of the invention to provide a label which enables a user to recognize information necessary when using a medicine bag in a reliable fashion. A label includes a base part 11-06-2008

Kazunari Takasugi, Kanagawa JP

Patent application numberDescriptionPublished
20110037745LEVEL SHIFT OUTPUT CIRCUIT AND PLASMA DISPLAY APPARATUS USING THE SAME - A level shift output circuit includes a level shifter interconnecting first and second power supplies that supply first and second voltages, the second being lower than the first voltage. The circuit outputs complimentary first and second output signals responsive to complimentary first and second input signals. High breakdown voltage inverters interconnect the first and second power supplies, and are configured to output a third output signal responsive to a first control signal and the first output signal from the level shifter and output a fourth output signal which is complimentary with the third output signal, responsive to a second control signal complimentary with the first control signal, and the second output signal. P-type transistors interconnect the first power supply and a power supply output node, and respectively supply the first voltage to the power supply output node in response to the fourth output signals from the high breakdown voltage inverters.02-17-2011

Patent applications by Kazunari Takasugi, Kanagawa JP

Kei Takasugi, Hino-Shi JP

Patent application numberDescriptionPublished
20120242813INFORMATION PROCESSING APPARATUS AND CAPSULE ENDOSCOPE SYSTEM - An information processing apparatus includes a storage unit that stores data of the in-vivo images and information which is associated with the data of the in-vivo images and related to a position of a capsule endoscope in an inside of a subject; a positional information obtaining unit that obtains positional information of the capsule endoscope in capturing the in-vivo images based on the information related to the position; and a sequence changing unit that changes a sorting sequence of the in-vivo images based on the positional information obtained by the positional information obtaining unit.09-27-2012

Keiji Takasugi, Osaka JP

Patent application numberDescriptionPublished
20110096045DISPLAY APPARATUS - A display apparatus according to one embodiment of the present invention is a display apparatus comprising a surface mount-type light-emitting device having an external terminal for surface mounting; a wiring substrate where the surface mount-type light-emitting device has been mounted; a lens unit disposed opposing the surface mount-type light-emitting device; and a frame body portion disposed surrounding the lens unit.04-28-2011

Kouji Takasugi, Kanagawa JP

Patent application numberDescriptionPublished
20090049349SEMICONDUCTOR DEVICE USING LOGIC CHIP - A system-in-package type semiconductor device includes a logic chip; and a memory chip connected with external terminal through the logic chip. The logic chip includes a data holding circuit configured to hold a test data in a test mode, and store the test data supplied through the data input/output terminal in the data holding circuit in response to a test data set command, and writes the test data which has been stored in the data holding circuit in the memory chip in response to the test data write command.02-19-2009

Masahide Takasugi, Osaka-Shi JP

Patent application numberDescriptionPublished
20120281020NETWORK SYSTEM, COMMUNICATION METHOD AND COMMUNICATION TERMINAL - Provided is a network system including at least first and second communication terminals capable of communicating with each other via a network. The first communication terminal causes handwritten data input in response to an instruction for a point on an image to be displayed in a certain position on the image corresponding to this point, associates the point information about the point with the handwritten data and transmits the point information and the handwritten data to the second communication terminal. Based on the point information and the handwritten data from the first communication terminal, the second communication terminal causes at least a part of the image to be displayed on a second display and also causes the handwritten data to be displayed in a location in accordance with the point information.11-08-2012
20120309367COMMUNICATION TERMINAL, COMMUNICATION METHOD, AND COMPUTER READABLE STORAGE MEDIUM HAVING COMMUNICATION PROGRAM STORED THEREIN - A communication terminal includes a first communication device, a second communication device, a speaker, a microphone, and a processor. The processor performs audio communication with another communication terminal via the first communication device, the speaker and the microphone and during the audio communication with the other communication terminal the processor receives an instruction issued to start data communication and while performing the audio communication the processor also performs the data communication in response to the instruction with the other communication terminal via the second communication device.12-06-2012
20130014022NETWORK SYSTEM, COMMUNICATION METHOD, AND COMMUNICATION TERMINAL - A first communication terminal includes a first communication device, a first touch panel for displaying motion picture contents, and a first processor for accepting input of a hand-drawing image. The first processor transmits a hand-drawing image input during display of the motion picture contents and start information for identifying a point of time when input of the hand-drawing image at the motion picture contents is started to a second communication terminal. The second communication terminal includes a second touch panel for displaying motion picture contents, a second communication device for receiving the hand-drawing image and start information from the first communication terminal, and a second processor for displaying the hand-drawing image from the point of time when input of the hand-drawing image at the motion picture contents is started on the second touch panel, based on the start information.01-10-2013
20130024537NETWORK SYSTEM, COMMUNICATION METHOD, AND COMMUNICATION TERMINAL - A communication terminal includes a touch panel, a communication device for communicating with an other communication terminal, and a processor for reproducing contents using a touch panel, temporarily stopping reproduction of the contents and transmitting a stop instruction to the other communication terminal according to a first input, resuming the reproduction of the contents and transmitting the resumption instruction to the other communication terminal according to a second input, temporarily stopping the reproduction of the contents according to a stop instruction from the other communication terminal, and resuming the reproduction of the contents according to a resumption instruction from the other communication terminal.01-24-2013
20130036358NETWORK SYSTEM AND COMMUNICATION METHOD - A first terminal (02-07-2013

Munehiro Takasugi, Saitama-Shi JP

Patent application numberDescriptionPublished
20090056504Hammer for breaking polycrystalline silicon - The hammer for breaking polycrystalline silicon is provided with a handle portion extending along a center axis and a head portion extending in a direction intersecting a direction of the center axis at the leading end of the handle portion. The head portion is provided with a head main body connecting with the handle portion, a striking part installed at one end of the head main body via a coupling shaft portion, and a counter weight portion installed at the other end of the head main body. The head main body, the coupling shaft portion, the striking part and the counter weight portion are formed integrally from a hard metal. A round-raised striking surface is formed at the striking part.03-05-2009

Satoru Takasugi, Kyoto-Fu JP

Patent application numberDescriptionPublished
20090103212Magnetic Head Suspension - An elastic plate connected at both ends to a pair of supporting pieces of a supporting portion and connected at center to a member forming a load beam portion functions as a load bending portion, thereby enhancing impact resistance against jumping motion of a magnetic head slider. A balance mass member is mounted on a portion of the member forming the load beam portion positioned on a base-end side than the elastic plate, thereby enhancing impact resistance against clashing motion of the balance mass member while equilibrating mass between tip-end and base-end sides of the load beam portion. A narrowest portion of the supporting portion is positioned, with respect to the suspension lengthwise direction, between a position of a base-end of a concave portion defined the pair of supporting pieces and a position where phantom lines extending from inner side edges of arm areas of the supporting pieces intersect with a longitudinal center line of the suspension, thereby effectively reducing mass of tip-end side of the supporting portion without deteriorating rigidity of the supporting pieces.04-23-2009
20090190261Magnetic Head Suspension - A load bending part includes a pair of first elastic plate parts and a second elastic plate part. The pair of first elastic plate parts are elastically deformed in a bended manner so as to generate a first pressing load. The second elastic plate part is positioned between the pair of first elastic plate parts in the suspension widthwise direction in a state of having both ends in its longitudinal direction connected to a pair of support pieces of a supporting part, and are elastically deformed in a twisted manner around a twist axis line along the suspension widthwise direction so as to generate a second pressing load. The total of the first and second pressing loads functions as a load for pressing the magnetic head slider toward the disk surface against air pressure due to rotation of a disk surface.07-30-2009
20100246067Magnetic Head Suspension - In a magnetic head suspension according to the present invention, each of paired right and left connecting beams that are positioned on both sides of an open section, with which paired piezoelectric elements are at least partially overlapped in a plan view, in a suspension width direction and connect a proximal end section that is directly or indirectly connected to a main actuator and a distal end section to which the load bending part is connected includes proximal-side and distal-side beams. The distal-side beam is inclined with respect to the proximal-side beam in a plan view such that a connection point between the proximal-side and distal-side beams is located closer to a suspension longitudinal center line relative to a virtual line connecting the proximal end of the proximal-side beam and the distal end of the distal-side beam.09-30-2010
20110058282Magnetic Head Suspension - In a magnetic head suspension according to the present invention, each of paired piezoelectric elements is disposed within an open section of a supporting part so that at least a part of its distal-side end surface faces a distal-side wall surface of the distal end section of the supporting part with having a distal-side gap between the distal-side end surface and the distal-side wall surface and at least a part of its proximal-side end surface faces a proximal-side wall surface of the proximal end section of the supporting part with having a proximal-side gap between the proximal-side end surface and the proximal-side wall surface in a state where both of upper and lower electrode layers of the piezoelectric element do not face the supporting part and any rigid members that are fixed to the supporting part. Each of the paired piezoelectric elements is fixed to the supporting part by a distal-side insulative adhesive agent and a proximal-side insulative adhesive agent that fill the distal-side gap and the proximal-side gap, respectively.03-10-2011
20110249366Magnetic Head Suspension and Manufacturing Method Thereof - A flexure metal plate includes distal and proximal end side-center-support plate forming regions that are positioned on distal and proximal sides within an open section. To a distal end section of a supporting part that is positioned on a distal side of the open section, first and second-distal side-metal plates are fixed so as to be positioned on an outer side of the distal end side-center-support plate forming region in a width direction, and to a proximal end section of the supporting part that is positioned on a proximal side of the open section, first and second-proximal side-metal plates are fixed so as to be positioned on an outer side of the proximal end side-center-support plate forming region in the width direction. The first and second-distal side-metal plates form a distal end side-support plate in cooperation with the distal end side-center-support plate forming region, and the first and second-proximal side-metal plates form a proximal end side-support plate in cooperation with the proximal end side-center-support plate forming region.10-13-2011
20120206835Magnetic Head Suspension - In a magnetic head suspension according to the present invention, each of paired right and left connecting beams that are positioned on both sides of an open section, with which paired piezoelectric elements are at least partially overlapped in a plan view, in a suspension width direction and connect a proximal end section that is directly or indirectly connected to a main actuator and a distal end section to which the load bending part is connected includes proximal-side and distal-side beams. The distal-side beam is inclined with respect to the proximal-side beam in a plan view such that a connection point between the proximal-side and distal-side beams is located closer to a suspension longitudinal center line relative to a virtual line connecting the proximal end of the proximal-side beam and the distal end of the distal-side beam.08-16-2012
20120218664Magnetic Head Suspension - The present invention provides a magnetic head suspension, wherein a supporting portion such as an arm or base plate includes a pair of supporting pieces extending from its opposite sides in the widthwise direction to a tip-end side of the suspension, and a concave portion which is defined by the pair of supporting pieces and is opened toward the tip-end side of the suspension, there is provided an elastically-deformable elastic plate which is connected to the pair of supporting pieces at a first end and a second end in the widthwise direction of the magnetic head suspension, the member forming the load beam portion is connected to the elastic plate, and the elastic plate forms the load bending portion.08-30-2012
20120218665Magnetic Head Suspension - The present invention provides a magnetic head suspension, wherein a supporting portion such as an arm or base plate includes a pair of supporting pieces extending from its opposite sides in the widthwise direction to a tip-end side of the suspension, and a concave portion which is defined by the pair of supporting pieces and is opened toward the tip-end side of the suspension, there is provided an elastically-deformable elastic plate which is connected to the pair of supporting pieces at a first end and a second end in the widthwise direction of the magnetic head suspension, the member forming the load beam portion is connected to the elastic plate, and the elastic plate forms the load bending portion.08-30-2012
20120224280Magnetic Head Suspension - The present invention provides a magnetic head suspension, wherein a supporting portion such as an arm or base plate includes a pair of supporting pieces extending from its opposite sides in the widthwise direction to a tip-end side of the suspension, and a concave portion which is defined by the pair of supporting pieces and is opened toward the tip-end side of the suspension, there is provided an elastically-deformable elastic plate which is connected to the pair of supporting pieces at a first end and a second end in the widthwise direction of the magnetic head suspension, the member forming the load beam portion is connected to the elastic plate, and the elastic plate forms the load bending portion.09-06-2012
20120236438Magnetic Head Suspension - The present invention provides a magnetic head suspension, wherein a supporting portion such as an arm or base plate includes a pair of supporting pieces extending from its opposite sides in the widthwise direction to a tip-end side of the suspension, and a concave portion which is defined by the pair of supporting pieces and is opened toward the tip-end side of the suspension, there is provided an elastically-deformable elastic plate which is connected to the pair of supporting pieces at a first end and a second end in the widthwise direction of the magnetic head suspension, the member forming the load beam portion is connected to the elastic plate, and the elastic plate forms the load bending portion.09-20-2012
20120281316Magnetic Head Suspension - In a magnetic head suspension according to the present invention, each of paired right and left connecting beams that are positioned on both sides of an open section, with which paired piezoelectric elements are at least partially overlapped in a plan view, in a suspension width direction and connect a proximal end section that is directly or indirectly connected to a main actuator and a distal end section to which the load bending part is connected includes proximal-side and distal-side beams. The distal-side beam is inclined with respect to the proximal-side beam in a plan view such that a connection point between the proximal-side and distal-side beams is located closer to a suspension longitudinal center line relative to a virtual line connecting the proximal end of the proximal-side beam and the distal end of the distal-side beam.11-08-2012
20120281317Magnetic Head Suspension - In a magnetic head suspension according to the present invention, each of paired right and left connecting beams that are positioned on both sides of an open section, with which paired piezoelectric elements are at least partially overlapped in a plan view, in a suspension width direction and connect a proximal end section that is directly or indirectly connected to a main actuator and a distal end section to which the load bending part is connected includes proximal-side and distal-side beams. The distal-side beam is inclined with respect to the proximal-side beam in a plan view such that a connection point between the proximal-side and distal-side beams is located closer to a suspension longitudinal center line relative to a virtual line connecting the proximal end of the proximal-side beam and the distal end of the distal-side beam.11-08-2012

Patent applications by Satoru Takasugi, Kyoto-Fu JP

Satoru Takasugi, Kyoto-Shi JP

Patent application numberDescriptionPublished
20090279209Magnetic Head Suspension - An elastic plate that is supported at both ends by a pair of supporting pieces of a supporting part functions as the load bending part. A portion of a load beam base plate that is positioned on a distal end side than a load bending center line BL of the elastic plate includes a parallel region that is fixed to the elastic plate, an intermediate region that extend to a distal end side through a proximal-side bending line along a suspension widthwise direction, and a distal region that extends to a distal end side through a distal-side bending line and is formed with a dimple with which a head-mounting region of a flexure part is brought into contact. The distal-side bending line is positioned in the vicinity of an intermediate point between the load bending center line and the dimple in a suspension lengthwise direction.11-12-2009

Shinichiro Takasugi, Fukuoka JP

Patent application numberDescriptionPublished
20110077127TRAINING SUPPORT SYSTEM AND TRAINING SUPPORT METHOD - A training support system (S) allows an exerciser to practice training exercises safely and effectively with high motivation. The training support system (S) comprises a display means (03-31-2011
20110082006TRAINING MACHINE AND METHOD FOR CONTROLLING TRAINING MACHINE - A training machine for enabling the exerciser to exercise under a load appropriate for the individual exercise capability and physical function of the exerciser. The exerciser (E) enters a desired velocity-load characteristic into a load characteristic input device (04-07-2011

Shin-Ichiro Takasugi, Fukuoka-Shi JP

Patent application numberDescriptionPublished
20120133113TRANSFER AND LOCOMOTION APPARATUS - Disclosed is a transfer and locomotion apparatus with excellent functionality, stability, versatility, and user-friendliness such that a person requiring nursing care can transfer between the transfer and locomotion apparatus to a bed and a toilet seat, etc., keeping the orientation of the body. The apparatus has a simple structure, is operable by a single person, imposes no strain on the person's back and lumbar part, etc., and can comfortably be used even if the person has injured-spine and so forth. The apparatus comprises a base part having a driving part, a seat part provided on the base part and which a user can sit from a back portion or a side portion, and a breast pad part standing in a front end side of the seat part and contacting a breast of the user. At least one of the seat part and the breast pad part is held to be able to move forward and backward, and upward and downward with respect to the base part.05-31-2012

Takayuki Takasugi, Osaka JP

Patent application numberDescriptionPublished
20090120543Ni3A1-Based Intermetallic Compound With Dual Multi-Phase Microstructre, Production Method Thereof, and Heat Resistant Structural Material05-14-2009
20090308507Ni-BASED COMPOUND SUPERALLOY HAVING EXCELLENT OXIDATION RESISTANCE, METHOD FOR MANUFACTURING THE SAME, AND HEAT-RESISTANT STRUCTURAL MATERIAL - The present invention is characterized in including Al: more than 5 at % to 13 at % or less; V: 3 at % or more to 9.5 at % or less; and Ti: 0 at % or more to 3.5 at % or less, with the remainder being Ni and unavoidable impurities, and having a multi-phase microstructure including a primary L112-17-2009
20120134615HIGH-TEMPERATURE AXLE BEARING MADE OF NI3(SI, TI)-BASED INTERMETALLIC COMPOUND ALLOY AND METHOD FOR PRODUCING THE SAME - The present invention provides an axle bearing having excellent life under high temperature.05-31-2012

Patent applications by Takayuki Takasugi, Osaka JP

Takayuki Takasugi, Sakai-Shi JP

Patent application numberDescriptionPublished
20120171071Ni3(Si, Ti)-BASED INTERMETALLIC COMPOUND TO WHICH Ta IS ADDED - The present invention provides a structural material having excellent hardness (strength) characteristics.07-05-2012
20120216922Ni3(Si, Ti)-BASED INTERMETALLIC COMPOUND TO WHICH W IS ADDED, AND METHOD FOR PRODUCING SAME - The present invention provides a structural material having enhanced ductility characteristics at high temperatures and enhanced strength characteristics.08-30-2012
20130008572Ni-BASE DUAL MULTI-PHASE INTERMETALLIC COMPOUND ALLOY CONTAINING Nb AND C, AND MANUFACTURING METHOD FOR SAME - The present invention provides an Ni-base dual multi-phase intermetallic compound alloy which has a dual multi-phase microstructure comprising a primary precipitate L101-10-2013
20130014862Ni-BASE DUAL MULTI-PHASE INTERMETALLIC COMPOUND ALLOY CONTAINING Ti AND C, AND MANUFACTURING METHOD FOR SAMEAANM Takasugi; TakayukiAACI Sakai-shiAACO JPAAGP Takasugi; Takayuki Sakai-shi JPAANM Kaneno; YasuyukiAACI Sakai-shiAACO JPAAGP Kaneno; Yasuyuki Sakai-shi JP - The present invention provides an Ni-base dual multi-phase intermetallic compound alloy which has a dual multi-phase microstructure including: a primary precipitate L101-17-2013

Toshiyasu Takasugi, Hadano JP

Patent application numberDescriptionPublished
20120179418MOTION ANALYSIS DEVICE AND MOTION ANALYSIS METHOD - A motion analysis device includes two posture angle sensors attached to a measurement object at locations distant from each other, a data acquisition section, a posture angle correction section, and a deformation amount calculation section. The data acquisition section acquires data of a first posture angle and a second posture angle respectively detected by the posture angle sensors. The posture angle correction section corrects a difference between the first posture angle and the second posture angle after starting a motion of the measurement object in accordance with a difference between the first posture angle and the second posture angle before starting the motion of the measurement object. The deformation amount calculation section calculates a deformation amount of the measurement object based on a difference between the first posture angle and the second posture angle corrected by the posture angle correction section.07-12-2012
20120196693SWING ANALYSIS DEVICE, PROGRAM, AND SWING ANALYSIS METHOD - A swing analysis device includes a sensor section including a motion sensor adapted to detect a swing of sports equipment, a swing characteristic information calculation section adapted to calculate swing characteristic information of the swing based on output data of the motion sensor, the output data corresponding to the swing, a swing selection section adapted to select the swing characteristic information, and a reference swing characteristic information calculation section adapted to calculate reference swing characteristic information used as a reference based on the swing characteristic information selected, and store the reference swing characteristic information into a storage section.08-02-2012

Yasuhiro Takasugi, Ibaraki JP

Patent application numberDescriptionPublished
20090181112TABLET COMPOSITION CONTAINING KAMPO EXTRACT - Provided is a tablet composition containing Kampo extract having more excellent disintegration and dissolution properties than ever before. The tablet composition containing Kampo extract contains a Kampo extract powder, croscarmellose sodium, and sodium hydrogen carbonate. The Kampo extract powder is preferably at least one extract powder selected from the group consisting of Kakkonto, Kakkontokasenkyushin'i, Shoseiryuto, Tokishakuyakusan, Kamishoyosan, Keishibukuryogan, Hochuekkito, Bofutushosan, Goshajinkigan, Maobushisaishinto, Keishikajutsubuto, Juzentaihoto, Sokeikakketsuto, Shakuyakukanzoto, Keishininjinto, Tokakujokito, Yokukansan, Goreisan, and Eppikajutsuto.07-16-2009

Yoshiharu Takasugi, Iruma-Shi JP

Patent application numberDescriptionPublished
20100076268ENDOSCOPE FOR OBLIQUE VIEWING - An endoscope for oblique viewing including an image pickup device, a front lens group having a positive refractive power, a prism disposed on the CCD side of the front lens group, and a rear lens group disposed on the CCD side of the prism and having a positive refractive power.03-25-2010

Yuji Takasugi, Kobe-Shi JP

Patent application numberDescriptionPublished
20080196970EXHAUST SYSTEM FOR COMBUSTION ENGINE - An exhaust system includes a tubular inner shell for passing therethrough exhaust gases from a combustion engine, and a tubular outer shell enclosing the tubular inner shell and cooperating therewith to define a sound silencing chamber into which the exhaust gases are introduced. The tubular inner shell forms an inner peripheral wall of the sound silencing chamber, and an upstream portion of the inner peripheral wall is formed with a perforated wall area having a plurality of communicating perforations for communicating between an interior of the tubular inner shell and the sound silencing chamber, and a downstream portion of the inner peripheral wall has a non-perforated wall area having no communicating perforation defined therein.08-21-2008