baber/WOPTO huggingface dataset:
Patent JP-2003188776-A (JP)
Title: Acoustic echo erasing method and device, and acoustic echo erasure program
Inventor: EMURA AKIRA
IPC: H04B3/23
Filed: 2001-12-21
Abstract: <P>PROBLEM TO BE SOLVED: To provide an acoustic echo erasing method in which the acoustic echo of an adaptive filter can be estimated robustly at high speed even in a high noise status.  <P>SOLUTION: An error signal obtained as the difference between the acoustic echo and a dummy echo is converted to the frequency domain at the interval of a short time, a received signal is converted to the frequency domain for each short-time block as a signal for correction, and a correction vector is obtained by multiplying the error signal and the signal for correction in the frequency domain for each frequency component. In the frequency domain, the short-time average of a received signal power spectrum, the cross spectrum of the received signal and a sound collecting signal and the power spectrum of the sound collecting signal is obtained, the ratio of the acoustic echo signal in the sound collecting signal is estimated for each frequency band, and the reciprocal of the short-time average of the power spectrum of the corresponding received signal and the ratio of the acoustic echo signal in the sound collecting signal are multiplied to the correction vector for each frequency band. Thus, the correction vector is corrected and by using that corrected vector, a dummy echo route in the frequency area is updated.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2003196921-A (JP)
Title: Data recorder and data recording method, data reproducing device and data reproducing method, data delivery server, data reception terminal and data recording medium
Inventor: SAKO YOICHIRO
IPC: G06F21/60
Filed: 2001-12-21
Abstract: <P>PROBLEM TO BE SOLVED: To protect a copyright of contents and to permit free copying of the contents.  <P>SOLUTION: An optical pickup 62 reads the contents encrypted by organism information of one or a plurality of users possessing and/or utilizing the contents from an optical disk 1. The contents subjected to gain processing or the like in an RF amplifier 63 are binarized in a binarization circuit 64, are demodulated in a demodulation circuit 65, are subjected to error correction in an error correction circuit 66, and are supplied to a content cipher cryptoanalysis section 68. An organism information reading section 67 reads the organism information of one or a plurality of the users requesting the reproduction and supplies the same to the cryptoanalysis section 68. In the cryptoanalysis section 68, the encryption of the contents supplied from the circuit 66 is cryptoanalyzed and outputted by the organism information supplied from the reading section 67.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2003198657-A (JP)
Title: Serial-port sharing system, method of outputting data, and method of inputting data
Inventor: KITAMURA SHUNICHI
IPC: H04L29/10
Filed: 2001-12-25
Abstract: <P>PROBLEM TO BE SOLVED: To switch a data supplier and data receiver to each other without destructing data when the data outputted from the data supplier are inputted to the data receiver through a serial port.  <P>SOLUTION: A service processor 2 causes a UART 3 to stop the output of data to an output buffer 11 and, after all data in the buffer 11 are outputted to the serial port 4, outputs data to the buffer 11. After the data outputted to the buffer 11 are outputted to the serial port 4, the processor 2 causes the UART 3 to restart data output. In addition, the processor 2 causes a switching section 24 to output data divided by prescribed data to the processor 2 and the other data to the UART 3. Whether or not the prescribed data are stored in an input buffer 21 is notified to the service processor 2 from the input buffer information notifying section 22.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2003196775-A (JP)
Title: Meter reader
Inventor: HORIIKE YOSHIO
IPC: G08C15/00
Filed: 2001-12-27
Abstract: <P>PROBLEM TO BE SOLVED: To provide a meter reader capable of preferentially receiving a data signal for security even in the middle of the transmission of a data signal for automatic meter reading.  <P>SOLUTION: When meter side radio equipment is requested for meter-read information, a transmitting means 12 repeatedly transmits a header part n times, and then transmits a telegraphic message A having an information part composed of packets including data, and operation of a channel scanning means 14 subsequently scans a prescribed plurality of channels over a prescribed period of time T or the prescribed number M of times. If a carrier sensing means 15 detects existence of a carrier, a channel scanning operation is stopped, and a receiving means performs receiving. If a signal is to a self-station, shifting is made to receiving processing, and if the signal is not to the self-station, shifting is made to channel scanning again, and the operation of the transmitting means repeats an operation that transmits the telegraphic message A again after the elapse of the prescribed period of time T or the prescribed number M of times.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2003198825-A (JP)
Title: Communication apparatus
Inventor: MATSUMOTO MASAYUKI
IPC: H04M11/00
Filed: 2001-12-27
Abstract: <P>PROBLEM TO BE SOLVED: To provide a communication apparatus capable of connection to a plurality of lines so as to set a communication parameter independently of each line thereby enhancing the convenience for a user.  <P>SOLUTION: The user optionally selects whether a parameter with respect to communication is independently set by each of first and second lines or set by the first and second lines in the lump. The user optionally selects whether the parameter with respect to the communication is set differently from the contents by each of the first and second lines or is set with the same contents to the first and second lines. In a first storage area 19a, the parameter with respect to the communication for the first line is stored and in a second storage area 19b, the parameter with respect to the communication for the second line is stored.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2003190465-A (JP)
Title: Seal adhering structure for game component
Inventor: ARAI MISAO
IPC: A63F7/02
Filed: 2001-12-27
Abstract: <P>PROBLEM TO BE SOLVED: To provide a seal adhering structure for a game component by which a seal is easily removed even when the seal is adhered onto the front surface of the game component with a strong adhesive.  <P>SOLUTION: The seal S1 is adhered with the adhesive on the front surface 30a of a first unit member 30. An adhering position 30b which is recessed in a shape being nearly the same as that of the seal is formed on the front surface 30a and the seal is adhered to the adhering position 30b. A removal hole 36 penetrating the first unit 30 to the rear surface 30d is formed at the edge of the adhering position. When the seal is removed from the first unit member by using a removal bar 40, the bar is pushed through the removal hole from the rear surface of the first unit member. Thus, the seal adhered to the adhering position is pushed-up at the edge 42 by the bar, separated from the adhering position and turned upward. The seal is easily removed from the adhering position only by pinching the turned-up edge by fingers and pulling it up.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2003091953-A (JP)
Title: Slider assembly
Inventor: CHEN SHIXIN
IPC: G11B5/596
Filed: 2001-12-28
Abstract: PROBLEM TO BE SOLVED: To provide a slider assembly in which the position of a head can be finely adjusted. SOLUTION: A slider assembly 60 for a data storage device is provided with a slider main body 110, a piezoelectric element 130 mounted on the slider main body 110 and a head 140 mounted on the element 130. The slider main body 110 can be moved and the element 130 can be operated to adjust the position of the head with respect to a data storage medium.
Patent JP-2002302182-A (JP)
Title: Drip absorbing mat
Inventor: SHIBATA AKIRA
IPC: B65D85/50
Filed: 2001-12-28
Abstract: PROBLEM TO BE SOLVED: To provide a drip absorbing mat which can prevent a color of food such as meat in contact with the mat from degrading when the food such as meat is put on the mat. SOLUTION: The drip absorbing mat 10 to be placed under food which has drips comprises an absorbing sheet 11 for absorbing the drips and a porous surface sheet 13 placed on the sheet 11 and in contact with the food. Breathability of the drip absorbing mat 10 is improved both in its thickness direction and in its plane direction, thereby preventing the color of meat in contact with the mat 10 from degrading.
Patent JP-2003180755-A (JP)
Title: Moving lift wheelchair
Inventor: SHIMURA MASAO
IPC: A61G5/00
Filed: 2001-12-18
Abstract: <P>PROBLEM TO BE SOLVED: To provide a moving lift wheelchair having functions of a moving lift and a wheelchair in one unit.  <P>SOLUTION: The moving lift wheelchair has the function of the wheelchair by mounting frames (3), (4) on frames (1), (2) bent in an arch type, disposing the distal ends of the frames (1), (2) downwardly, mounting wheels (5), (6) at the distal ends of the frames (1), (2), mounting a backrest (16), folding seat (7) and a folding armrest (8) at the wheel (5) side, and the function of the moving lift by mounting a sheave (9) arm (17) and a winch (chain block) (10) on the upper parts of the frames (1), (2) in such a manner that the two functions are provided in the one unit.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2003501673-A (JP)
IPC: G01N21/25
Filed: 2000-06-09
Abstract: The present invention relates to an apparatus, instrument and device for conducting an assay. The apparatus comprises a first inlet (12), a second inlet (14) and an inlet port (16) accommodating a filter or binder retaining means, wherein said inlet port is moveable relative to first and second inlets such that the inlet port can be brought into liquid communication with each inlet as required.
Patent JP-2003503276-A (JP)
Title: 自動車の安定化方法および装置
IPC: B60T8/17
Filed: 2000-06-27
Abstract: (57)【要約】
自動車が横揺れ運動に関してモニタリングされ、そして横揺れ運動が検出されたとき、自動車に、横揺れ運動に対してほぼ逆位相であるほぼ周期的なヨー・モーメントが自動的に発生される、自動車により牽引されるトレーラを有する自動車、特に乗用車の安定化方法および装置。
Patent JP-2003504610-A (JP)
Title: 光学的ターゲット、およびその自動識別のための装置ならびに方法
IPC: G01C15/06
Filed: 2000-06-29
Abstract: (57)【要約】
光ターゲット（１）は、位置を判断するための位置決め用サブターゲット（２）と、１つの光ターゲット（１）から他の光ターゲットを識別するための複数の識別用サブターゲット（３）とを含み、複数の識別用サブターゲット（３）の各々は位置決め用サブターゲット（２）とは異なる色をしている。
Patent JP-2003508169-A (JP)
Title: 連続的インフロー状態および断続的アウトフロー状態を備えた、流体圧作動血液ポンピングのシステムおよび方法
IPC: F04B49/06
Filed: 2000-08-29
Abstract: (57)【要約】
血液処理システムおよび関連方法は、ソースと目的位置との間をインライン連絡された、第１および第２の流体作動ポンプステーションを配置する。システムおよび方法は、流体圧ポンプストロークを第１および第２のポンプステーションに適用して、ソースから目的位置へと流体を運搬する。システムおよび方法は、第１のフローモードと第２のフローモードとの間を切り換える。第１のフローは、ソースから第１のポンプステーションへと流体容量を汲み出し、そして第２のポンプステーションから目的位置へと流体容量を排出する。第２のフローモードにおいて、ポンプストロークは、ソースから第２のポンプステーションへと流体容量を汲み出し、そして第１のポンプステーションから目的位置へと流体容量を排出する。ポンプストロークは、ソースからのフローが本質的に連続的である一方で、目的位置への流体フローが断続的であるように、同期化される。
Patent JP-2003509241-A (JP)
IPC: B29C48/08
Filed: 2000-09-11
Abstract: In a method and a device for continuously manufacturing films, webs, and sheets of plastics capable of forming optical images a melted plastic mass, pre-shaped as a sheet, is guided into a roller gap of a calender, the roller gap formed between a shaping engraving cylinder roller and a smoothing strip surrounding partially the shaping engraving cylinder roller. The shaping engraving surface of the cylinder roller is heated to melting temperature in the roller gap, wherein the melted plastic mass is applied directly onto the shaping engraving surface of the heated cylinder roller. A profiling is provided by cooling the melted plastic mass in the roller gap by heat removal on a side facing the shaping engraving surface.
Patent JP-2003509589-A (JP)
IPC: C21C7/072
Filed: 2000-09-18
Abstract: The additives, in particulate solid form, are conveyed pneumatically in a divergent stream from a pneumatic gun to impinge upon the molten iron and mix therewith. The gun is spaced above a surface of molten iron such that the pneumatically conveyed stream including the additive has a central axis which is either horizontal (or at an acute angle to the horizontal). The gun is prefereably adjustable for adjustment of the stream angle, and the stream may be either added to pouring metal or to cover a surface of the molten iron.
Patent JP-2003526233-A (JP)
Title: 分類適応誤り回復方法及び装置
IPC: G10L19/02
Filed: 2000-08-22
Abstract: (57)【要約】
劣化した信号を劣化のない信号に復元するための方法、装置及び製品を提供する。劣化した信号（１０１）は、複数の劣化したデータ点及び劣化していないデータ点を含む。データ信号は、前処理（２８０）されて、動き補償された信号が生成される。各劣化したデータ点に対して、その劣化したデータ点を含む領域の特性に基づいて、複数のクラスの種類が生成される。動きベクトルが検出され、検出された動きベクトルに基づいて、データがシフト（２０７）される。データ点は、複数のクラスの種類のうちの１つに関して分類（２１１）され、対応する入力信号クラスに割り当てられる。入力信号の分類結果に基づき、入力信号を適応的にフィルタリング（２０９）することにより、劣化のない信号が生成される。複数のクラスの種類を生成するために、２以上の分類法を使用してもよい。生成されるクラスには、例えば動きクラス、エラークラス、空間クラス、空間的アクティビティクラス等が含まれる。
Patent JP-2003519213-A (JP)
Title: ラクタムの精製方法
IPC: C07D201/16
Filed: 2000-12-27
Abstract: (57)【要約】
本発明はラクタム、特にアミノアルキルニトリルの環化加水分解によって得たラクタムの精製方法に関する。本発明は特に、アミノカプロニトリルの環化加水分解によって得たε−カプロラクタムの精製に関する。結晶化は、揮発性化合物を除去した後の環化反応媒質に直接行ってもよいし、或いは様々な処理を経た媒質に行ってもよいし、反応媒質から例えば蒸留で抽出したカプロラクタムに行ってもよい。
Patent JP-2003522866-A (JP)
Title: 横方向油井掘削用途のための再循環可能な球体落下式解放装置
IPC: E21B23/04
Filed: 2001-02-14
Abstract: (57)【要約】
チューブ状部材を取外す方法、および上側ハウジング（３１０）、下側ハウジング（３２０）と球体スリーブ（３３０）とから構成される装置である。この装置は、チューブ（１５０）とドリリングアセンブリ（２１０）との間に接続される。スプライン付き接続部が、上側ハウジングの溝付き窪み（３９５）と下側ハウジングのスプライン付き伸張部（４５０）との間に形成される。シャーネジ（３４０）が、球体スリーブ（３３０）をハウジングの内部で保持する。解放するために、掘削流体の密度と同等な密度を有する球体（３８０）が、井戸坑の向きに関係なく、ポンプで送られてスリーブ（３３０）上に着座する。スリーブ（３３０）の背後に圧力が生成して、シャーネジ（３４０）をせん断するので、スリーブ（３３０）が下側ハウジング（３２０）中に移動し、それにより、これらのハウジングを分離する。これらのハウジングが分離される前に、スリーブ（３３０）の再循環ポート（３７５）を通じて流体が継続して流れる。分離後、フイッシングツールが、伸張部を引っ掛けて、下側ハウジング（３２０）とドリリングアセンブリ（２１０）を取出す。フイッシングツールが装着されると、再循環ポート（３７５）を通じて流れが再開されて、取出しを容易にすることができる。
Patent JP-2003523386-A (JP)
IPC: A61K47/48
Filed: 2000-02-24
Abstract: Orally administrable acid stable anti-ulcer benzimidazole derivatives which are polymer based. The process of preparation comprises condensing a benzimidazole with a biocompatible partially orally biodegradable synthetic cross linked polymer in aqueous medium at 5-80° C. and pH 4-11 under inert atmosphere. The weight percentage of benzimidazole with respect to the polymeric benzimidazole is 1-50. The reaction mixture is cooled and the product is isolated and dried at 25-45° C. There is also provided a formulation of the polymeric benzimidazoles in combination with pharmaceutically acceptable excipients.
Patent JP-2004500244-A (JP)
IPC: B23K9/02
Filed: 2001-02-07
Abstract: A method and system for automatically filing the narrow gap between facing end walls of adjacent first and second railway rails by depositing vertically spaced layers of molten metal in the gap with an electric arc welding torch using a robotic mechanism that moves the torch in a pattern controlled by a low level robotic execute program from a spatial position to a next spatial position, said method and system comprising: constructing a data array for a specific gap, said array constituting a series of positions making up an idealized progression of said torch to fill said gaps in vertically spaced layers made up of multiple positions, each of said fixed positions identified by at least four coordinates, including (1) at least x, y and z, (2) the layer in which said position is a part and (3) the welding parameters to be executed while said torch moves toward the next position; outputting data relating to a specific position from said data array; processing said welding parameters associated with said outputted data using said robotic execute program; then, outputting the new fixed data relating to the next position in said series of points; processing said welding parameters associated with said new data using said robotic execute program; and, repeating said outputting and processing acts until said positions in said data array relating to a specific layer have been processed. Thereafter the method or system repeats the layer or processes the next layer comprising multiple stored positions.
Patent JP-2003525616-A (JP)
Title: マトリックス反応器および該反応器内での産物の製造方法
IPC: C12N15/09
Filed: 2001-03-07
Abstract: (57)【要約】
本発明は、反応のためのマトリックス反応器であり、それによって低分子反応物および高分子反応物が該反応に加わるものである反応のためのマトリックス反応器に関する。反応器チャンバーＶ R  は、マトリックスを内包し、反応区画および供給区画からなる。マトリックスは、低分子反応物を吸着しうる多孔質材料からなる。マトリックスの排除容積Ｖ 0  は反応区画として利用され、マトリックス容積Ｖ M  は供給区画として利用される。マトリックス反応器は、酵素的方法、特にタンパク質を製造するためのインビトロ転写／翻訳共役反応に使用されうる。
Patent JP-2003529224-A (JP)
Title: 安定化放射ソース
IPC: H01S5/12
Filed: 2001-03-14
Abstract: (57)【要約】
安定化放射ソース(300)は、（ａ）分散型フィードバック(DFB)レーザ(310)と、（ｂ）出力放射の一部分を第１及び第２の光学経路に結合するための後方レンズ(340)と、（ｃ）上記第１及び第２の経路を経て伝達された放射を検出し、そしてその放射電力を表す第１及び第２の信号(J 1 ,J 2 )を発生するための光学検出器(370,380)と、（ｄ）上記信号に応答して上記レーザ(310)を制御し、安定化を図るための制御手段(390)とを備えている。本発明は、上記第１及び第２の放射経路が、それら経路を経て上記検出手段(370,380)へ実質的にフィルタされない及び波長従属のフィルタされた放射伝達を与えるように動作できることを特徴とする。第１経路を経て伝達されて第１信号(J 1 )に変換される上記フィルタされない放射は、出力放射波長と独立したレーザ出力放射電力安定化を実施するのに特に適している。
Patent JP-2003203771-A (JP)
Title: Organic light emitting element, display device, and illumination device
Inventor: KANEKO NAOMI
IPC: H05B33/04
Filed: 2002-01-09
Abstract: <P>PROBLEM TO BE SOLVED: To prevent an organic electroluminescence element and a display device and an illumination device using the element from being deteriorated due to moisture absorption and oxidation.  <P>SOLUTION: In this organic electroluminescence element, at least a reflective layer, a light emitting area including an organic material, and a transparent or semi-transparent electrode are sequentially formed on a substrate. A translucent protective film is formed on the transparent or semi-transparent electrode. The protective film comprises a multi-layer film formed by laminating multiple layers of at least two or more types of thin films having different refractive indexes. The refractive indexes of the thin films sequentially laminated on the upper electrode are set to N1, N2, N3...Nn, and the ratios N(n-1)/Nn and Nn/N(n+1) of the sequentially laminated adjacent refractive indexes of the thin films are set to 0.8 to 1.1.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2003211686-A (JP)
Title: Liquid storage container and head cartridge using the same
Inventor: TSUJIMOTO AKIRA
IPC: B41J2/175
Filed: 2002-01-16
Abstract: <P>PROBLEM TO BE SOLVED: To provide a superiorly reliable, inexpensive and compact liquid storage container which can surely prevent a liquid from leaking from a storage part to the outside even in a long-term use.  <P>SOLUTION: There are set an atmosphere communication port 2c for enabling the air to circulate between the inside and the outside of the storage part 2 where the liquid is stored, an atmosphere communication path for guiding the atmosphere from the atmosphere communication port 2c to a predetermined atmosphere suction port 8a, a gas-liquid separating member 9 for blocking the liquid in the storage part 2 not to circulate from the atmosphere communication port 2c to the atmosphere communication path and enabling the air to circulate at the atmosphere communication port 2c, and liquid block walls 10 and 12 for blocking the liquid not to circulate in a space 7 formed from the gas-liquid separating member 9 to the atmosphere suction port 8a and enabling the air circulation.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2003210019-A (JP)
Title: Undercup for bush cutter
Inventor: MATSUURA TAKUJI
IPC: A01D34/68
Filed: 2002-01-18
Abstract: <P>PROBLEM TO BE SOLVED: To provide an undercup for a bush cutter that can inhibit the broken pieces of the periphery of the undercup from flying apart, even when it is damaged.  <P>SOLUTION: The cutting blade shaft is passed through and the cutting blade is fitted to the lower face of the lower pinching-pressing body in a pair of upper and lower pinching-pressing bodies. A bolt is threaded in the cutting blade shaft upward from the lower part to pinch the pair of upper and lower pinching-pressing bodies to hold the cutting blade and a downward projection is formed in a ring around the periphery of the pocket into which the bolt is buried whereby the undercup is constituted. Then, an auxiliary disk is provided inside the undercup so that the outer periphery of the undercup may be covered with the disk.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2003214549-A (JP)
Title: Relief valve
Inventor: EJIRI MAKOTO
IPC: F16K17/06
Filed: 2002-01-18
Abstract: <P>PROBLEM TO BE SOLVED: To provide a relief valve which adjusts time to keep low pressure when the relief valve is changed from a non-active state to an active state without reducing the diaphragm diameter.  <P>SOLUTION: This relief valve has: a rod 12 having a poppet 9 which can be engaged/disengaged with a seat 4, a small diameter part 10 slidably fitted to a hollow hole 7 of the poppet 9, a large diameter part 11 slidably fitted to an inner hole 2 of a housing 5; a spring 15 pressing an end 13 inside the poppet 9 and an end 14 inside the large diameter part of the rod 12 in the separating direction; and a cover 16 closing the other end of the housing 5 in capable of contact with an end 24 outside the large diameter part of the rod 12. At an end outside the small diameter part of the rod 12 fitted to the hollow hole 7 of the poppet 9, a plurality of peripheral grooves 21, a small hole 22 in the axial direction communicating between an end face 26 outside the small diameter part of the rod 12 and each of the peripheral grooves 21 and a hole 23 in the radial direction communicating to the innermost peripheral groove 21 are provided, and a hole 25 in the axial direction communicating to the radial direction hole 23 and opened at the end 24 outside the large diameter part of the rod 12 is provided at the rod 12.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2002329152-A (JP)
Title: Method for undoing operation remotely performed on server station
Inventor: JEAN-JACQUES MOREAU
IPC: G06Q30/00
Filed: 2002-01-22
Abstract: PROBLEM TO BE SOLVED: To undo a function in common environment wherein several clients access one server. SOLUTION: This method for undoing a function performed by a first client station (UP), the performance of the function being adapted to manipulate an object from an earlier state to a manipulated state, has a step (S1) wherein a request to undo the performance of an operation is received from a client station (UA) of a communication network, steps (S12 to S17) wherein the earlier state of the manipulated object is obtained, and a step (S27) wherein an answer including electronic money of an amount below or equal to a performance cost (c) regarding a function (f) is sent to the 1st client station (UP) through the communication network. This method is used in particular to undo operations performed during remote manipulation of a digital image.
Patent JP-2002238912-A (JP)
Title: Method and tool for providing preprocessing to femur so that it may receive modular femoral prosthetic component
Inventor: BLAMEY JONATHAN
IPC: A61B17/16
Filed: 2002-01-23
Abstract: PROBLEM TO BE SOLVED: To provide an improved method and tool for providing preprocessing to the femur so that it may receive a modular femoral prosthetic component. SOLUTION: A distal reamer 46 is used to preprocess the distal portion of the femoral canal. After that, when forming the size of the distal portion of the femoral canal, the reamer is left in the femoral canal. A proximal reamer 48 is hollow like a cannula, and is the size suited for fitting to the shank 64 of the distal reamer 46. The size of the proximal portion of the femoral canal is formed with the distal reamer 48 arranged in a prescribed position of the femur, and to control the depth of the proximal portion of the femoral canal, a mechanical stopper is used. The mechanical stopper prevents the proximal portion of the femoral canal from becoming too large and too small.