baber/WOPTO huggingface dataset:
Patent JP-2003166075-A (JP)
Title: Treatment solution for forming hexavalent chromium- free rust preventive coating on plated film with zinc and zinc alloy, hexavalent chromium-free rust preventive coating and method for forming the same
Inventor: OSHIMA KATSUHIDE
IPC: C23C22/30
Filed: 2001-11-30
Abstract: <P>PROBLEM TO BE SOLVED: To provide an extremely dilute treatment solution for forming extremely thin coating on a plated film of zinc and a zinc alloy, which has corrosion resistance equal to or higher than a conventional coating containing hexavalent chromium, in spite of containing no hexavalent chromium.  <P>SOLUTION: The treatment solution for forming a rust preventive trivalent chromate coating free from hexavalent chromium, includes a silicon compound, and trivalent chromium and oxalic acid of 0.5-1.5 by molar ratio, where trivalent chromium exists as a water-soluble complex with oxalic acid, and cobalt ions stably exists in the treatment solution, without precipitating through forming hardly soluble metal salts with oxalic acid. The treatment solution is characterized by forming a rust preventive trivalent chromate coating free from hexavalent chromium containing zinc, chromium, cobalt and oxalic acid, through reacting with zinc on the plated film of zinc and the zinc alloy, when being contacted with the plated film of zinc and the zinc alloy.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2003167872-A (JP)
Title: Content producing device, program and content producing method
Inventor: KOIDE ATSUSHI
IPC: G06F13/00
Filed: 2001-11-30
Abstract: <P>PROBLEM TO BE SOLVED: To convert an HTML sentence into a BML sentence for data broadcasting.  <P>SOLUTION: This digital broadcasting system is composed of a transmission side system 1 and a receiving side system 8. The transmission side system 1 has a sending-out system 3, an AV producing system 4, and a data broadcasting content producing system 2. The data broadcasting content producing system 2 has conversion software 22 for reading in and well-forming an HTML data source from a database 21, determining position coordinates and range coordinates by scanning a tree structure in rear order, and converting the coordinates into BML after adding a tag for indicating the determined position coordinates and range coordinates to the HTML data source.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2003168426-A (JP)
Title: Nonaqueous electrolyte secondary battery
Inventor: TABUCHI TORU
IPC: H01M4/134
Filed: 2001-12-03
Abstract: <P>PROBLEM TO BE SOLVED: To provide a nonaqueous electrolyte secondary battery having a large discharge capacity wherein silicon is used for a negative electrode active material.  <P>SOLUTION: In the nonaqueous electrolyte secondary battery constituted of a positive electrode composed of a material to store/release lithium ions, a negative electrode composed of a material to store/release lithium ions and nonaqueous electrolyte, fibrous silicon covered by a carbonaceous material is used as the negative electrode material.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2003175584-A (JP)
Title: Squeegee, cream soldering-printing device equipped therewith, screen printing device, and screen printing method
Inventor: ISOHATA YOSHIO
IPC: H05K3/34
Filed: 2001-12-11
Abstract: <P>PROBLEM TO BE SOLVED: To provide a squeegee to which a cream solder is hard to adhere, a screen printing device which is equipped with the squeegee and avoids the dragging of the cream solder, and a screen printing method.  <P>SOLUTION: A slope 34 of which a distance from a rear surface 33 expands as separating more from a screen 18 with the edge section 4 as a starting point is provided on a working surface 31 being confronted with the direction in which the squeegee 1 slides. Alternatively, on the rear surface 33, the slope 34 of which the distance from the working surface 31 expands as separating more from the screen 18 with the vicinity of the edge section 4 as the starting point is provided. Thus, the width of a releasing surface 32 located on the rear side in the sliding direction to the edge section 4 is narrowed, and the dragging of the cream solder 19 in a space between the releasing surface 32 and the screen 18 is avoided. At least one section of either one or all of the working surface 31, the releasing surface 32, the rear surface 33 and the slope 34 of the squeegee is covered with non-adherent substance layers A, B, C and D, and thus, the adhesion of the cream solder 19 may be avoided.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2003175150-A (JP)
Title: Game machine
Inventor: TANAKA NOBUHIRO
IPC: A63F5/04
Filed: 2001-12-12
Abstract: <P>PROBLEM TO BE SOLVED: To provide a game machine in which a decrease in cost and electric power saving can be achieved.  <P>SOLUTION: In a slot game machine 10, an electronic paper placed in front panels 22A, 22B, and 22C can display information and this displayed information can be changed. Thus, when the slot game machine 10 is reused or recycled, it is possible to cope with a specification change such as a face change by changing the displayed information on the electron paper, and hence, it is unnecessary to reproduce the front panels 22A, 22B, and 22C and the decrease in cost can be achieved. Moreover, because the electron paper can maintain an information displaying state for many hours with no electric power, electric power saving can be achieved.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2003187953-A (JP)
Title: Induction heating cooker
Inventor: OKADA KAZUICHI
IPC: H05B6/12
Filed: 2001-12-14
Abstract: <P>PROBLEM TO BE SOLVED: To control the speed of the cooling fan in accordance with the progress of cooking and suppress noise in a simple structure.  <P>SOLUTION: The cooker comprises a heating coil 19, 20 arranged in the pot unit 11, a drive circuit 27, 28 for driving the heating coil, a cooling fan 26, and an output operating part for adjusting the output of the heating coil 19, 20. Since the output setting of the output operating part and the speed of the cooling fan 26 are determined univocally, and the speed of the cooling fan 26 changes according to the output setting of the output operating part, the rotating speed of the cooling fan 26 needs not be fast unnecessarily, and the noise can be made low, while cooling of the equipment is maintained sufficiently.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2003186962-A (JP)
Title: On-line retrieval/preparation supporting program for cosmetics recipe, computer readable recording medium having the program recorded thereon, on-line retrieval supporting device for cosmetics, and on-line retrieval/ preparation supporting device for cosmetics recipe
Inventor: ISHIKAWA KOJI
IPC: G06Q50/00
Filed: 2001-12-14
Abstract: <P>PROBLEM TO BE SOLVED: To provide an on-line retrieval/preparation supporting device of cosmetics recipes for allowing a user to easily acquire information associated with cosmetics blend components to be used, and for conducting selection of cosmetics matching the request of the user and preparation of cosmetics recipes.  <P>SOLUTION: The data base of preliminarily stored cosmetics blend components and cosmetics recipes is referred to, and a cosmetic recipe adapted to cosmetics blend components most suitable for parameters such as the condition, liking, or allergy of the skin inputted by using a customer computer and a skin surface analyzing device or the like connected to the Internet and/or adapted to retrieved cosmetics blend components is selected. When any cosmetics recipe adapted to the inputted request items is not retrieved, an optimal cosmetic recipe is newly prepared.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2003187766-A (JP)
Title: Battery
Inventor: HORIMOTO KAZUHIRO
IPC: H01M2/02
Filed: 2001-12-18
Abstract: <P>PROBLEM TO BE SOLVED: To provide a battery in which a rib 6 is provided to a bottom surface 2a of an outer case body 2 so as to partially support a power generation element 1b via a laminated sheet so that no power generation element 1b moves due to a drop, etc., to disconnect a lead 1c.  <P>SOLUTION: The power generation element 1b is housed in a laminate case 1a which is a bag of laminated sheet. A battery cell 1, where the lead 1c connected to an electrode of the power generation element 1b is protruded from the inside of the laminate case 1a to the outside via the fusion-bonded part of the laminated sheet, is housed in an outer case 2 and an outer cover 3. The rib 6, which pressurizes the laminated sheet between the fusion-bonded part and the power generation element 1b toward the inside of the battery cell 1, is made to protrude from the bottom surface 2a of the outer case body 2.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2002249403-A (JP)
Title: Effect-enhancing agent for agrochemical
Inventor: HAYASHI TOSHIO
IPC: A01N25/30
Filed: 2001-12-19
Abstract: PROBLEM TO BE SOLVED: To provide an effect-enhancing agent for agrochemicals and an agrochemical composition being able to use safely without chemical injury to crops, showing a superior effect-enhancing ability to various agrochemicals, and improving growth of plants which are aimed to grow well. SOLUTION: This effect-enhancing agent for agrochemicals, contains at least one of specific alcohol compounds, ether compounds and ester compounds.
Patent JP-2003186449-A (JP)
Title: Display device
Inventor: KOBAYASHI YOSHIHISA
IPC: G02F1/133
Filed: 2001-12-19
Abstract: <P>PROBLEM TO BE SOLVED: To provide a display device which is hardly influenced by unnecessary radiation noise and inexpensive by decreasing the number of terminals of a display controller.  <P>SOLUTION: A display panel 1 has 1st and 2nd display areas 1a and 1b. First and second driving circuits 4 and 5 are provided corresponding to the display areas 1a and 1b and scan the display areas 1a and 1b. The display device displays specified information on the display panel 1 by scanning the 1st and 2nd display areas 1a and 1b in specified cycles. A display control means 21 is connected to the 1st and 2nd driving circuits 4 and 5 by a common data bus 22 and outputs 1st and 2nd reference signals which do not synchronize with the 1st and 2nd driving circuits 4 and 5. The 1st and 2nd driving circuits 4 and 5 can receive display data from the data bus 22 on inputting the 1st and 2nd reference signals and displays specified information corresponding to the received display data on the display panel 1.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2003193202-A (JP)
Title: High elasticity metastable austenitic stainless steel sheet and production method therefor
Inventor: TOMIMURA HIROKI
IPC: C22C38/58
Filed: 2001-12-25
Abstract: <P>PROBLEM TO BE SOLVED: To provide a metastable austenitic stainless steel sheet which has a high Young's modulus of ≥200,000 N/mm<SP>2</SP>in both the T direction and the L direction.  <P>SOLUTION: The steel sheet has a chemical composition containing, by mass, 0.01 to 0.20% C, 12.0 to 20.0% Cr, 4.0 to 12.0% Ni, and 0.01 to 0.20% N, and in which the valule of Md (N) defined as Md (N) =580-520C-2Si-16Mn-16 Cr-23Ni-26Cu-300N-10Mo reaches 0 to 125. The steel sheet has a fine austenite single phase structure having a mean particle diameter of ≤5 μm, a dual-phase structure of fine austenite+martensite where a part of the fine austenite phase is transformed into martensite, or a metallic structure obtained by subjecting these structures to cold rolling. The steel sheet is produced by using a method where a cold rolled steel sheet having the above chemical composition containing ≥60 vol.% martensite is heated at 550 to 850°C to inversely transform the martensite into austenite.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2003197420-A (JP)
Title: Solenoid apparatus
Inventor: TAKIMOTO KAZUHIDE
IPC: H01F7/16
Filed: 2001-12-26
Abstract: <P>PROBLEM TO BE SOLVED: To provide a solenoid apparatus that surely and stably actuate over long time, without deviations in the return timing of a moving core due to aged use.  <P>SOLUTION: An axial slit 17 is formed in a coil bobbin 12, and the open width of the slit 17 is set so that magnetomotive force due to a secondary current that is generated, when conduction in a coil 13 is broken can be inhibited to a small extent that can be ignored, as compared with the elastic force of a spring 16 for returning. Magnetic resistance is increased by an air gap in the slit 17.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2003190240-A (JP)
Title: Massage assembly and massage machine loaded with the same
Inventor: SUGA YUJI
IPC: A61H15/00
Filed: 2001-12-26
Abstract: <P>PROBLEM TO BE SOLVED: To provide a massage assembly reduced in weight and size and simplified in constitution by performing the operation of a massage unit and a medical treatment finger with one motor, and a massage machine loaded with it.  <P>SOLUTION: In this massage assembly, the massage unit including a medical treatment finger for applying wringing/tapping massage to a person to be treated is operated to reciprocate between a pair of frames. A screw shaft is fixedly disposed parallel to the reciprocating direction of the massage unit between the frames. The massage unit is provided with a screw member which is rotatably disposed in the stage of engaging with the screw shaft to relatively reciprocate the massage unit along the screw shaft by screw thrust, and one motor for rotating the screw shaft and operating the medical treatment finger. In this massage machine, the massage assembly is installed on the backrest of a chair or a bet.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2003081649-A (JP)
Title: Forming die for surface forming and method of manufacturing this formed die
Inventor: TOKITA MASAO
IPC: B29C33/42
Filed: 2001-12-26
Abstract: PROBLEM TO BE SOLVED: To provide a forming die for surface forming formed goods in the case these formed goods are made by glass and plastic material, i.e., a resin material. SOLUTION: This formed die 100 is formed to a desired shape by using a binderless superfine sintered hard alloy material in the segment of a molding surface 102 for forming at least the surface of the forming die and sintering this superfine sintered hard alloy material by a pulse electrosintering process and the forming surface 102 for forming the above surface is subjected to nearnet shaping sintering to a mirror finished surface form then to polishing.
Patent JP-2002308560-A (JP)
Title: Extendable conveyor belt and method of manufacturing the conveyor belt
Inventor: MITSUMA TADASHI
IPC: B65G15/26
Filed: 2001-12-27
Abstract: PROBLEM TO BE SOLVED: To provide a curving or a variable speed conveyor belt suitable for a conveyor belt for transporting personnel. SOLUTION: Cuts 24a extending in the lateral direction of a belt 12 to extend from the front surface to the rear surface of the belt 12, cuts 24b extending from the rear surface to the front surface, or cuts or hollow parts extending from the rear surface to the front surface of the belt 12 are provided in the belt at specified intervals in longitudinal direction so that the belt 12 can be extended in longitudinal direction.
Patent JP-2003190106-A (JP)
Title: Probe cover for aural thermometer
Inventor: MATSUMOTO YASUHIRO
IPC: A61B5/01
Filed: 2001-12-28
Abstract: <P>PROBLEM TO BE SOLVED: To provide a probe cover for an aural thermometer in which both the infrared transmissivity and flexibility of a cover part and the rigidity of a cover mounting part can be sufficiently fulfilled by vertically bonding and integrating the cover part and the cover mounting part molded separately.  <P>SOLUTION: In the synthetic resin probe cover for the aural thermometer in which the upper cover part 20 in the shape of flexible cap for covering the distal end of the probe of the aural thermometer and the lower cover mounting part 30 in the shape of rigid cylinder to be mounted and held on the body of the aural thermometer are integrally provided, overlapping faces 22a and 32a respectively formed on the lower end of the cover part 20 and the upper end of the cover mounting part 30 are vertically bonded and integrated. By respectively separately molding the cover part 20 and the cover mounting part 30 of different thickness, a metal die structure is simplified and molding is facilitated rather than the case by integrally molding them. The cover part 20 and the cover mounting part 30 can be easily integrated by bonding the respective overlapping faces 22a and 32a by welding or by using adhesives. By making different not only the thickness but also the materials of the cover part 20 and the cover mounting part 30, all of flexibility, infrared transmissivity and rigidity can be more secured.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2003201821-A (JP)
Title: Exhaust emission control device of internal combustion engine
Inventor: NAKATANI KOICHIRO
IPC: F01N3/02
Filed: 2001-12-28
Abstract: <P>PROBLEM TO BE SOLVED: To provide an exhaust emission control device for an internal combustion engine equipped with a particulate filter, which suppresses deterioration of the exhaust emission and a rise of the exhaust resistance, and recovers or maintaining the performance of the particulate filter.  <P>SOLUTION: The amount of the particulates in the exhaust gas downstream of the particulate filter increases while the performance of the filter is maintained or recovered. Downstream of the filter, a sweeper 45 is installed so as to capture the particulates. The sweeper is furnished with exhaust gas passages 57 and 58 partitioned by porous bulkheads 59, and the bulkheads to partition the end of at least one of the exhaust gas passages are formed aslant so that they approach each other. Small holes 55 and 56 are formed at the end of the passage by the slant bulkheads 52 and 53 and the ends of the passages are blocked partially. The flowing section area of each small hole is smaller than that of the passage and greater than the pores of the bulkheads.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2003205304-A (JP)
Title: Device for moving roll shaft of cold pilger mill
Inventor: NISHIHAMA WATARU
IPC: B21B21/02
Filed: 2001-12-28
Abstract: <P>PROBLEM TO BE SOLVED: To provide a new mechanism for horizontally moving a roll shaft in order to remove it from a rack in an unopenable roll stand cover type cold Pilger mill.  <P>SOLUTION: In the cold Pilger mill, this device for moving the roll shaft of the cold Pilger mill is composed of two hydraulic cylinders of a drawing cylinder 6 on the side of a pinion 2 and an inserting cylinder 7 on the opposite side are oppositely mounted in the position of the height of the lower roll shaft 1 on both side faces of the roll stand cover 3.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2003205445-A (JP)
Title: End face polishing method
Inventor: MINAMI KOJI
IPC: B24B19/00
Filed: 2001-12-28
Abstract: <P>PROBLEM TO BE SOLVED: To provide an end face polishing method, capable of improving the polishing accuracy of the end face of a ferrule and enlarging the return loss in opposite connection.  <P>SOLUTION: In this end face polishing method, a bar-like member 12 mounted on a tool board 13 is pressed to a polishing member 18 on a polishing board 15 supported on the apparatus body 14 to be rotated and rocked, thereby polishing the end face of the bar-like member 12. A plurality of polishing members 18 having higher hardness than the bar-like member 12 and different in hardness are used to polish the end face of the bar-like member 12 with the polishing members 18 sequentially replaced to have a higher hardness and a lower hardness.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2003501907-A (JP)
Title: 無線端末へのダウンロード方法及び装置
IPC: H04M1/72406
Filed: 2000-05-19
Abstract: (57)【要約】
本発明は、１つが現バージョンとして動作する、少なくとも２つのソフトウェア要素を有する無線端末にソフトウェアをダウンロードする方法に関する。無線端末内の現バージョンのソフトウェアの機能の能力が端末の起動時に判定される。新バージョンのソフトウェアの存在又は、現バージョンが正しく動作しないことが通知された場合、別バージョンのソフトウェアがダウンロードされる。現バージョンが正しく動作する場合、新しいバージョンがダウンロードされる前に、現バージョンが保存される。現バージョンの機能の能力は使用前にテストされる。テストの結果は前記テストされたバージョンのソフトウェアの機能の能力が判定可能な形式で示される。本発明はまた、本発明の方法を実行する手段を有する無線端末に関する。
Patent JP-2003501669-A (JP)
Title: 複数の電極を備えたチップおよびそのようなチップに膜を形成するための方法
IPC: H01L31/046
Filed: 2000-05-31
Abstract: (57)【要約】
本発明は、チップに関するものであって、ベース（４０，４４）と、ベースの表面（１４）上に設けられた複数の電極（２０）と、ベース内に組み込まれた複数の電力発生源（２２）であるとともに各電極に対して単一の電力発生源が接続されているようにして複数の電極に対して接続されている複数の電力発生源（２２）と、を具備するチップに関するものである。複数の電極は、微小グルーブを構成するようにしてあるいはメサ構造を構成するようにして、互いに絶縁される。電力発生源は、光起電性電力発生源または熱起電性電力発生源または圧電性電力発生源のいずれかから選択される。本発明は、生物学的分析および化学的分析に使用することができる。
Patent JP-2003516716-A (JP)
Title: 酵母トランスクリプトームの特徴付け
IPC: C12Q1/68
Filed: 2000-06-14
Abstract: (57)【要約】
細胞周期の間に発現が変化する酵母遺伝子が記載される。このような遺伝子は、真核細胞の細胞周期の研究やモニター、それに影響を与えるために使用されうる。細胞周期の調節に関与するヒトのホモログを得るために使用されうる。抗真菌剤および他の薬剤クラスの同定に使用されうる。種々の条件下での細胞のトランスクリプトームを調べるために、固体支持体上のアレイを形成することもできる。
Patent JP-2003506032-A (JP)
IPC: C12Q1/37
Filed: 2000-07-31
Abstract: The invention relates to a novel protease, called SENP1, which is active against sentrin-modified proteins in vivo. The invention more specifically relates to the genomic and amino acid sequences for SENP1, compositions related to and based on these sequences, and methods of using these sequences and compositions.
Patent JP-2003508294-A (JP)
Title: ワイパブレードをワイパアームに連結するための連結片
IPC: B60S1/40
Filed: 2000-08-08
Abstract: (57)【要約】
本発明は、ワイパアーム１１をワイパブレードに連結するための連結片１０に関し、連結片がワイパアーム１１のための異なる３種の固定システムを有し、その結果、多数のワイパアーム１１を受容することが可能である。
Patent JP-2003510674-A (JP)
Title: ２次元データを標準的表示に変換する方法
IPC: G06F17/24
Filed: 2000-09-08
Abstract: (57)【要約】
２次元データ、特にＨＴＭＬフォーマットの情報を可聴または他のビジュアル形式でレンダリングするように標準的表示へ変換する方法が提供され、ここで、関係する各素子は数学的正則表現の一部、即ちツリーでパースされることができる表現の一部に基づいて選択される。選択を実行するために、素子のコンテナが位置付けられ、パースされたツリー内の素子のローカル経路にしたがって行われ、それによってこの識別に組込まれる素子のシグネチャーが構成され、後に関係する素子の値を検索しレンダリングするのに使用するために記憶されることができる。関係する素子はその後、適切な関係する言語変換器により問合わせ者にレンダリングされる。さらに本発明を改良した方法は反復される素子を検索し、その後最初に反復される素子のような選択され反復された素子の１つだけを記憶する。
Patent JP-2003513297-A (JP)
IPC: G02F2/02
Filed: 2000-08-18
Abstract: A method of converting an optical wavelength includes providing a wavelength converter assembly with a photodetector and a laser that have a common epitaxial structure with areas of differing bandgap. The laser including a laser resonator. An optical input with a first wavelength is absorbed at the wavelength converter assembly. A first electrical signal is generated from the photodetector in response to the optical input. The first electrical signal is conditioned and produces a conditioned first electrical signal. A second electrical signal is generated from the conditioned first electrical signal. A laser output is generated from a gain medium of the laser at a second wavelength in response to the second electrical signal.
Patent JP-2003512734-A (JP)
Title: 可撓性電子回路及びその製造方法
IPC: H01M10/44
Filed: 2000-10-18
Abstract: (57)【要約】
縫合可能な電子部品は可撓性の導線（１００）を有し、少なくとも部分的に、密封されたパッケージ（１０５，１１０）内に収容されている。導電性のスレッド、糸、又はファイバ束（１２０）が可撓性基体（１２５）（例えば布地パネル）上にパターン形成される。回路を形成するには、部品導線（１００）は導電的に縫合され、スポット溶接され、或いはその他によって布地パネル（１２５）に接合されて、少なくとも幾つかの縫合された導線（１００）相互間に接続が形成されるようにし、電気回路が形成される。代替的には、布地パターン（１２５）に対して縫合その他によって接合された導線（１２０）を、可撓性又は非可撓性の部品導線（１００）に対して溶接その他によって永久的に接合して、回路を形成してもよい。このようにして形成された多数の回路パネルは次いで、縫合、溶接、及び／又は他の接合手段の組み合わせによって、好ましくは絶縁層を介在させて、種々の位置で物理的及び電気的に接合し、多層可撓性回路を形成することができる。
Patent JP-2003513731-A (JP)
Title: 真空掃除機の緩衝構造キャスタホィール
IPC: A47L9/00
Filed: 2000-03-15
Abstract: (57)【要約】
【課題】  掃除機本体の底部に設けられるキャスタホィールを適切に変形及び配置して、掃除機本体の方向転換が自在に行え、掃除機本体が壁などに衝突することを未然に防止したり又は衝撃を緩和できるようにした真空掃除機の緩衝構造キャスタホィールを提供する。
【解決手段】  本真空掃除機の緩衝構造キャスタホィールは、真空掃除機本体の底面部の前方に固着され、その一部が掃除機本体の両側面の外部へ突出しており、２軸回転の可能な２つ以上のキャスタホィールアセンブリーを含み、そのキャスタホィールアセンブリーは、上方に凸状を有する半球状から形成され、真空掃除機本体の底面部の垂直回転軸を中心に回転自在に装着されるボディと、このボディの下部の一側で水平回転軸を中心に回転自在に装着されるホィールとを備えることを特徴とする。