baber/WOPTO huggingface dataset:
Patent TW-202308075-A (TW)
Title: Heat sink and heat sink production method
Inventor: NAKAMURA TAKUMI
IPC: H01L23/46
Filed: 2022-05-03
Abstract: This invention is characterized in that: slits comprise a plurality of first slits (21) arranged rectilinearly on a substrate (2), and a plurality of second slits (22) formed rectilinearly and intersecting with the first slits (21) on the substrate (2); a pin fin (3) has a pin fin lower part (10) that rises continuously from the substrate (2), and a pin fin upper part (11) that extends continuously from the pin fin lower part (10); and a groove width (W2) that is of the first slits (21) and the second slits (22) and that corresponds to the pin fin upper parts (11) is greater than a groove width (W1) that is of the first slits (21) and the second slits (22) and that corresponds to the pin fin lower parts (10).
Patent TW-202246015-A (TW)
Title: robot system
Inventor: FUJIOKA NAOKI
IPC: B25J13/08
Filed: 2022-05-10
Abstract: This robot system comprises: a robot on which a hand for handling a workpiece is mounted; a movement mechanism that can change the relative positions of the robot and the workpiece; a workpiece sensor that can detect the position of the workpiece with respect to the robot; an obstacle sensor that can detect the position of a surrounding obstacle with respect to the movement mechanism; and a control device that controls the robot and the movement mechanism. The robot comprises a load sensor that can detect a load acting on at least one operating axis of the robot. The control device generates a first map that indicates the arrangements of the workpiece and the obstacle from the detected position of the workpiece and position of the obstacle, generates a second map that indicates a degree of influence on the lifetime of the robot for each relative positioning by the movement mechanism on the basis of the load detected by the load sensor when the workpiece is lifted up by the hand, and determines the relative positioning by the movement mechanism on the basis of the generated first map and second map.
Patent TW-202332259-A (TW)
Inventor: MAO DULI
IPC: G02B5/20
Filed: 2022-05-16
Abstract: CMOS image sensor with LED flickering reduction and low color cross-talk are disclosed. In one embodiment, an image sensor includes a plurality of pixels arranged in rows and columns of a pixel array that is disposed in a semiconductor substrate. Each pixel includes a plurality of large subpixels (LPDs) and at least one small subpixel (SPD). A plurality of color filters are disposed over individual subpixels. Each individual SPD is laterally adjacent to at least one other SPD.
Patent TW-202306473-A (TW)
Title: Installation assisting device having handheld part
Inventor: CHEN PO-AN
IPC: H05K5/02
Filed: 2021-07-21
Abstract: An installation assisting device having handheld part includes first rack, second rack, supporting rod, controller and pressure sensor. First movable portions of first rack each include first handheld part and first positioning part. First fixed portion of first rack has two first openings separated from each other. Two first hand handheld parts respectively protrude from two first positioning parts and located in two first openings. Second movable portions of second rack each include second handheld part and second positioning part. Second fixed portion of second rack has two second openings separated from each other. Two second hand handheld parts respectively protrude from two second positioning parts and located in two second openings.
Patent TW-202306618-A (TW)
Title: Game system, operation control method of game system and program
Inventor: AMBE YUTO
IPC: A63F13/46
Filed: 2022-07-19
Abstract: A game system, including multiple stations in which the stations included a first station and a second station. The multiple stataions comprising a first group. The game system comprising first lottery member, an acquiring member and a calculating member. The first lottery member producing a common lottery result for the multiple stations. Acquiring member getting a first data and a second data, the first data based the lottery result and a first configuration set on the first stataion, the second data based on the lottery result and a second configuration set on the second station. The calculating member calculating a reward corresponded to the first data and the second data for the first station.
Patent TW-202312913-A (TW)
Title: 緩衝體
Inventor: NISHIKAWA YASUYUKI
IPC: A47C27/00
Filed: 2022-07-29
Abstract: 本發明之一實施型態的緩衝體係具有沿著第1方向延伸的長邊、以及沿著與第1方向交叉的第2方向延伸的短邊，並且具有朝向鉛直上方的表面、以及朝向鉛直下方的背面的緩衝體。緩衝體具有：在表面當中以分別沿著第1方向及第2方向並列的方式排列成格子狀的複數個凸部；在沿著第2方向並列的兩個凸部之間於第1方向延伸的第1表側開縫；以及在沿著第1方向並列的兩個凸部之間於第2方向延伸的第2表側開縫。緩衝體具有：由被沿著第2方向並列的兩個第1表側開縫、及沿著第1方向並列的兩個第2表側開縫所包圍的複數個凸部構成的複數個凸部群。第2表側開縫的深度為第1表側開縫的深度以下。
Patent TW-202322257-A (TW)
Title: 轉移晶圓基底的系統、降低相對濕度方法及減少氣流方法
Inventor: HUANG SUNG-JU
IPC: H01L21/677
Filed: 2022-08-16
Abstract: 本揭露實施例是有關於用於在製造製程期間前開口傳送盒裝載到設備前端模組上且用於轉移半導體晶圓基底時，降低前開口傳送盒內的濕度的系統和方法。指定結構的偏轉器放置在前開口傳送盒的裝載口上方的設備前端模組內。偏轉器引導設備前端模組中的氣流遠離裝載口。偏轉器包括在偏轉器主體中具有多個孔且具有傾斜前表面的主體。因此，降低了從設備前端模組進入前開口傳送盒的高濕度空氣的穿透程度。
Patent TW-202302728-A (TW)
Inventor: STOWELL MICHAEL W
IPC: D06M10/00
Filed: 2019-02-27
Abstract: 方法包括在電漿反應器中產生複數個碳顆粒，在該電漿反應器中原位官能化該複數個碳顆粒以促進與黏合劑之黏附，及組合該複數個碳顆粒與該黏合劑以形成複合材料。該複數個碳顆粒包含3D石墨烯，其中該3D石墨烯包含孔基質及石墨烯奈米片子顆粒，該等石墨烯奈米片子顆粒呈以下形式中之至少一者：單層石墨烯、少數層石墨烯或多層石墨烯。方法亦包括在電漿反應器中產生複數個碳顆粒；在該電漿反應器中官能化該複數個碳顆粒以促進與樹脂之化學鍵合；及在該電漿反應器內組合該經官能化之複數個碳顆粒與該樹脂以形成複合材料。
Patent TW-202327940-A (TW)
Inventor: BONNAIN JEAN-CHRISTOPHE
IPC: B65B17/02
Filed: 2022-09-30
Abstract: 本發明係有關一種包裝系統，一種用以形成一包裝件的裝置，一種用以包裝一件或以上物品的物品攜具(90；290)，一種用以形成該攜具的若干片互連胚片(10A-B；110A-D；310A-F，410A-C)，以及一種包裝一件或以上物品的方法。該攜具(10A-B；110A-D；310A-F，410A-C)包括一片主板片(12；112；312；412)，該主板片具有一個或以上物品固持結構(RT；RT1、RT2)，以便容置和將該主板片(12；112；312；412)固定到一對應物品(B)。該若干片互連胚片(10A-B；110A-D；310A-F，410A-C)包括在該等胚片(10A-B；110A-D；310A-F，410A-C)應用到物品組(B)前而於其間切斷的脆弱連接部。
Patent TW-202316908-A (TW)
Title: 用於多層加熱器構建部之經成形電氣互連結構
Inventor: MICHELSEN JULIAN
IPC: H05B3/06
Filed: 2022-10-07
Abstract: 一種用於連接一多層加熱器之複數層的電氣互連件包括具有一下端部分及一上端部分的一成形體。該下端部分具有比該上端部分之一接觸區域更小的一接觸區域，且該下端部分之該接觸區域係靠近一加熱層，而該上端部分之該接觸區域係靠近一路由層。
Patent TW-202312563-A (TW)
Inventor: NI CHING-YU
IPC: H01Q1/52
Filed: 2021-06-28
Abstract: An electronic device in which an antenna module is stacked on a PCB provided with a reflector for stacking, it is a three dimensional antenna structure by stacking so that enables the reflector to effectively reflect the signal from the antenna module to improve the antenna. The signal directionality of the line module further enables the radiation direction of the antenna module to be in an ideal direction.
Patent TW-202324519-A (TW)
Title: Method of processing workpiece and laser processing apparatus
Inventor: NAYUKI MASATOSHI
IPC: H01L21/301
Filed: 2022-11-22
Abstract: A method of processing a plate-shaped workpiece includes a sheet affixing step of laying a thermocompression bonding sheet on a surface of the workpiece and heating and pressing the thermocompression bonding sheet against the workpiece to affix the thermocompression bonding sheet to the workpiece, a laser beam applying step of applying a laser beam having a wavelength absorbable by the workpiece to another surface of the workpiece along a projected dicing line established thereon, thereby processing the workpiece along the projected dicing line, and a sheet joining step of pressing the thermocompression bonding sheet while reheating the thermocompression bonding sheet to soften the same, so that the thermocompression bonding sheet is joined up by closing dividing grooves or through holes made in the thermocompression bonding sheet when the workpiece is processed in the laser beam applying step.
Patent TW-202323390-A (TW)
Inventor: PARK SE-JOO
IPC: C08G73/10
Filed: 2022-11-28
Abstract: The present disclosure relates to a polyamic acid composition comprising: a polyamic acid comprising, as a polymerization unit, at least one selected from a dianhydride monomer represented by Chemical Formula 1 and a diamine monomer represented by Chemical Formula 2 or Chemical Formula 3; an imidazole-based compound; an epoxy-based compound; and an organic solvent, and a polyimide comprising the same. The polyamic acid composition of the present disclosure and the polyimide comprising the same have excellent mechanical properties such as strength and elongation while maintaining a low yellow index and excellent thermal properties.
Patent TW-202336080-A (TW)
Inventor: OH HYUN-WOO
IPC: C08G63/183
Filed: 2022-12-22
Abstract: 本發明係關於一種共聚合聚酯樹脂，且係關於一種其製備方法。特定言之，根據本發明之一實施例，該共聚合聚酯樹脂包含衍生自二醇組分之重複單元及衍生自二羧酸或其衍生物組分之重複單元，其中控制第一至第三二醇或第四至第六二醇之含量，由此有可能將抗衝擊強度及固有黏度調整在適當範圍內而不使透明度劣化。當其應用於需要高耐衝擊性及高耐熱性之產品，諸如例如食物容器的封裝材料及汽車內部部件時，其將展現極佳特徵。
Patent TW-202332341-A (TW)
Title: Electronic component mounting device and electronic component mounting method
Inventor: YOSHIDA SHINICHI
IPC: H05K3/34
Filed: 2023-01-16
Abstract: An electronic component mounting device (1) comprises: an electronic component supply unit (20) that supplies an electronic component having a bump electrode (EB); a transfer stage (31) that accumulates a flux (FX); a mounting stage (41) on which a substrate (BD) is placed; a plurality of heads that can each pick up an electronic component (CP); and a control unit (10) that controls movement of the plurality of heads. The control unit (10) is configured so as to cause each of the plurality of heads to function as a dipping head that dips the bump electrode (EB) of the electronic component (CP) into the flux (FX) accumulated on the transfer stage (31), or as a bonding head that mounts the electronic component (CP) to the substrate (BD) on the mounting stage (41) with the bump electrode (EB) interposed therebetween.
Patent UA-49135-A (UA)
Title: Method of treating liquid brewing yeast, proteinous sediment and malt spent grain
Inventor: KLITSENKO HRYHORII TYMOFIYOVYCH
Filed: 2000-04-11
Abstract: A method of treating liquid brewing yeast, protein sediment and malt spent grain consists in the enriching them with organic acid. First, the yeast, sediment or malt spent grain are pasteurized, and then they are subjected to evaporating under vacuum, 0.01-0.05 МPа in depth at a temperature of 60-70°С up to condensing the base product accumulating in it 35-65% of dry matter.
Patent UA-37799-A (UA)
Title: Method for express diagnosis of acute hematogenous osteomyelitis in children
Filed: 2000-04-17
Abstract: The method for the express diagnosis of the acute hematogenous osteomyelitis in the children provides for the diagnostic puncture of the affected bone. The punctate of the bone marrow is centrifuged, pH is measured. When pH exceeds 5.6, the acute hematogenous osteomyelitis is diagnosed. The invention relates to the surgery and may be used as a diagnosticum for detecting the acute hematogenous osteomyelitis in the children.
Patent UA-39080-A (UA)
Filed: 2000-05-04
Abstract: The invention relates to medicine, to surgery and may be used for the prophylaxis of postoperative venous thromboembolism. A method for prophylaxis of postoperative venous thromboembolism includes the elimination of venous congestion by intravenous low intensity laser irradiations of blood in the preoperative period. The amount of sessions is determined on the base of the initial indexes of thromboflexogram and level of blood fibrinogen.
Patent UA-40882-A (UA)
Title: a PROCESS OF THE purification of water from metal ions
Inventor: Dedenko Ivan Kyrylovych
Filed: 2000-09-26
Abstract: Proposed process of the purification of water from metal ions is realized by contact with organic-silicon polymer sorbent at pH=3-9. In the method there is used organic-silicon polymer sorbent of a series of: polymethylsiloxane, silicopolymethylsiloxane, silicopolyvinylsiloxane-, alumopolymethylsiloxane or an arbitrary mixture thereof.
Patent UA-40531-A (UA)
Title: Горілка "гусарська оригінальна"
Inventor: SAVCHENKO YURII VALENTYNOVYCH
Filed: 2001-05-03
Abstract: Реферат Горілка містить суміш спирту етилового ректифікованого та води пом'якшеної з розрахунку на міцність 40 об'ємних %, лимонну кислоту від 0,002 до 0,004 масових%, цукор від 0,2 до 0,3 масових%, мед від 0,1 до 0,2 масових%, двовуглекислий натрій від 0,008 до 0,015 масових %.
Patent UA-51925-A (UA)
Title: Method for jelly producing
Inventor: BEZUSOV ANATOLII TYMOFIIOVYCH
Filed: 2001-09-25
Abstract: The method for jelly production includes using the pectin solution in presence of peroxidase ferment. A highly methoxided pectin solution added with horseradish peroxidase at 40 - 45 % sugar content and 3 - 7 media pH is used.
Patent UA-59578-A (UA)
Title: An energy-efficient aeration tank with a local gas saturation
Inventor: KURYLIUK MYKOLA STEPANOVYCH
Filed: 2002-08-28
Abstract: An energy-efficient aeration tank with a local gas saturation consists of body to which the fitting of water supply for purification is applied, system of gas saturation with the mechanism of air supply and distribution network with nozzles, pipeline for intake and withdrawal of water from the body into clarifier, to which nipple for withdrawal of purified water and silt pipeline with dosing pump are connected joining clarifier with the aeration tank body. The distribution network of the gas saturation system is equipped with nozzles of single-ended action and disposed in the separate aeration tray, provided in the mechanism, to which the fitting of water supply for purification and pipeline of water overflow from the tray into the body are applied, the mechanism being also equipped with the system of supplementary circulation of water between the body and the aeration tray which is composed of mixer pump disposed in the body and the pipeline.
Patent UA-52547-A (UA)
Title: Composition of ingredients for fruit aromatic wine “cherry with honey”, “plum with honey”, “apple with honey”, apricot with honey”, peach with honey”, ashberry with honey”, cranberry with honey”, “currant with honey”
Inventor: ZHYKHARIEV YURII VALENTYNOVYCH
Filed: 2002-09-26
Abstract: Composition of ingredients for fruit aromatic wine includes processed apple juice, honey component, ethyl spirit, citric acid, sugar syrup, water. Additionally it includes liqueur on concentrated apple juice and СО2-extractions of plant raw material, aromatizers of plant raw material, taste additive, caramel sugar and color.
Patent RS-20050034-A (RS)
Title: Plain bearing having an overlay alloy layer
Inventor: JOHAL CHARAN PREET SINGH
IPC: C25D3/32
Filed: 2003-06-20
Abstract: A plain bearing and method for making the plain bearing are described, the plain bearing having an overlay alloy layer at a sliding surface of the plain bearing, the plain bearing comprising a layer of a strong backing material, a layer of a first bearing alloy bonded to the strong backing material and a layer of a second bearing material comprising said overlay material bonded to said first bearing alloy layer wherein said second bearing material comprises tin having included in the matrix thereof an organic levelling agent.
Patent RS-20050556-A (RS)
Title: Viral polymerase inhibitors
Inventor: BEAULIEU PIERRE LOUIS
IPC: C07D405/14
Filed: 2004-01-19
Abstract: An isomer, enantiomer, diastereoisomer or tautomer of a compound, represented by formula (I): wherein wherein A, B, R2, R3, L, M1, M2, M3, M4, Y1, Y0, Z and Sp are as defined in claim 1, or a salt thereof, as an inhibitor of HCV NS5B polymerase.
Patent AP-1534-A (AP)
Title: Vitronectin receptor antagonists.
Inventor: MILLER WILLIAM H
IPC: A61K33/243
Filed: 1999-12-03
Granted: 2006-01-09
Abstract: The compound of formula (I) is disclosed which is a vitronectin receptor antagonist and is useful in the treatment of osteoporosis or a pharmaceutically acceptable salt thereof.
Patent AP-1895-A (AP)
Title: Novel benzoimidazole derivatives useful as antiproliferative agents.
Inventor: BARTH WAYNE ERNEST
IPC: A61K31/00
Filed: 2000-11-10
Granted: 2008-10-08
Abstract: The invention relates to compounds of formula (1) and to pharmaceutically acceptable salts, prodrugs and solvates thereof, wherein R1,R7,R8,R9,R10, and R11 are as defined herein. The invention also relates to methods of treating abnormal cell growth, such as cancer, in mammals by administering the compounds of formula 1 and to pharmaceutical compositions for treating such disorders which contain the compounds of formula (1). The invention also relates to methods of preparing the compounds of formula (1).
Patent DO-P2009000097-A (DO)
Title: Peliculas adhesivas
Inventor: HATLEWICK JULIE R
Filed: 2009-04-29
Abstract: Esta invención comprende una película útil como adhesivo, una composición útil para elaborar la película y un laminado que comprende la película contigua con al menos un sustrato metálico, al menos un sustrato de espuma o una combinación de los mismos. La composición comprende (a) al menos un polímero de olefina injertada con ahídrido, (b) al menos un polietileno de alta densidad, y (c) al menos un elastómero, el cual preferentemente tiene una elogación por tracción a la rotura de al menos aproximadamente 585%, una densidad a lo sumo de aproxidamente 0.9000 g/cm3 o una combinación de las mismas. El polímero de olefina injertada con anhídrido o combinación del mismo se encuentra preferentemente presente en una cantidad de desde aproximadamente 20 hasta aproximadamente 40 por ciento en peso, el polietileno de alta densidad o combinación del mismo se encuentra preferentemente presente en una cantidad de desde aproximadamente 40 hasta aproximadamente 60 por ciento en peso y el elastómero o combinación del mismo se encuentra preferentemente presente en una cantidad de desde aproximadamente 17 hasta aproximadamente 30 por ciento en peso. Cada polimero de olefina injertada con inhíbrido es independientemente muy preferentemente un polietileno de alta densidad injertado con anhídrido maléico. Prefentemente, el polietileno de alta densidad tiene un índice de fusión a lo sumo de aproximadamente 30 dg/min. Preferentemente, el elastómero es un polímero de etileno sustancialmente lineal o copolímero de bloque de olefina.
Patent DO-P2010000052-A (DO)
Title: Entidades quimicas biciclicas que contienen nitrogeno para el tratamiento de infecciones virales
Inventor: RAI ROOPA
IPC: C07D471/04
Filed: 2010-02-05
Abstract: se proporcionan ciertas entidades quimicas seleccionadas a partir de los compuestos de la formula (1): composiciones farmaceuticas, y metodos de tratamiento de un miembro de la familia de virus flaviviridae, tal como el hepacivirus (hepatitis C o virus de hepatitis C {HCV})
Patent EC-SP10010347-A (EC)
Title: (r)-2-(4-ciclopropansulfonil-fenil)-n-pirazin-2-il-3-(tetrahidropiran-4-il)-propionamida cristalina
Inventor: DUNLAP JEANETTE TOWER
IPC: A61K31/497
Filed: 2010-07-15
Abstract: La presente invención se refiere a R-2-(4-ciclopropansulfonil-fenil)-N-pirazin-2-il-3-(tetrahidropiran-4-il)-propionamida cristalina, y a métodos para su preparación y uso.
Patent EC-SP11011253-A (EC)
Title: Composición farmacéutica sólida que comprende amlodipina y losartan
Inventor: WOO JONG SOO
IPC: A61K31/44
Filed: 2011-08-09
Abstract: La presente invención se relaciona con una composición farmacéutica sólida para la prevención o tratamiento de desórdenes cardiovasculares que comprenden amlodipina y losartan como ingredientes activos, y un desintegrante el cual es una mezcla de por lo menos dos componentes seleccionados del grupo consistente de glicolato de almidón de sodio, sodio de crucecarmelosa, y crucepovidona, las cuales exhiben un nivel alto y estable de tasas de disolución de amlodipina y el losartan.
Patent EE-201100048-A (EE)
Inventor: GROSS JANE A
IPC: A61P31/04
Filed: 2000-01-07
Abstract: There is provided a fusion protein consisting of a first portion and a second portion joined by a peptide bond, wherein said first portion consists of an amino acid sequence selected from: (i) amino acid residues 25-104 of SEQ ID NO: 6; (ii) amino acid residues 34-66 of SEQ ID NO: 6; (iii) amino acid residues 71-104 of SEQ ID NO: 6; and (iv) amino acid residues 34-66 and 71-104 of SEQ ID NO: 6; and said second portion is an immunoglobulin heavy chain constant region. There is also provided an antibody or antibody fragment that specifically binds to a polypeptide selected from SEQ ID NO: 59 or SEQ ID N: 60. There is also provided an antibody or antibody fragment that specifically binds to a ztnf4 polypeptide, for use in treating systemic lupus erythematosus in a mammal.
Patent GB-189700663-A (GB)
Title: An Improvement in Cycle Frames, consisting of a Hinged or Movable Bar.
Inventor: GORSE ALFRED
Filed: 1897-01-09
Granted: 1897-06-05
Abstract: 663. Gorse, A. Jan. 9. Frames; convertibles. - The Figures show the invention applied to a bicycle, but it is also applicable to tricycles, tandems, &c. The upper frame member A is hinged at a' to a lug B fixed to the steering-post, and may be connected at its other end to either of the lugs b<1> or F, in order to adapt the machine for use by either a lady or a gentleman. In its upper position, the projection a<4> fits into a socket in the lug b<1>, the forks a<3> grip the sides of the lug, and the rod C sliding in the collars c', c', c<3> fits into the socket b<4>. A catch c' fitting into the socket c<5> completes the fixing of the bar. A spring S keeps everything tight. To place the rod in its lower position, the levers E are pulled back, thereby releasing the rod C and catch c<4> and lowering the bar A till the projection c<3> falls into the socket f <2>. On releasing the lever, the spring S forces the rod C into the socket f<2> and the catch c<5> into the socket b<3>, thus fixing the bar A.
Patent GB-189701541-A (GB)
Title: Improvements in Hoisting Appliances.
Inventor: WALKER GEORGE
Filed: 1897-01-20
Granted: 1898-01-15
Abstract: 1541. Walker, G., and Mitchell, A. H. Jan. 20. Cranes.-Mechanical or other appliances are used to manipulate the jibs of derricks and hoisting- apparatus. A chain fixed to the jib is guided round pulleys and coiled upon a drum. When this drum is rotated the amount of chain paid out on one side is equal to the amount coiled in on the other, and by this means the jib is slewed. In a modification shown in Fig. 3, the mast M and crosshead C are fixed and the jib J is pivoted at F, and a rod S, with right and left-handed screws mounted in bearings in the jib, has nuts N', N<2> which are connected to the crosshead by rods R', R<2>. When the rod S is rotated the nuts N', N' either approach or recede from one another and cause the jib to turn to the right or left. In another modification, the rams of two hydraulic cylinders are employed to slew the jib. In Fig. 7, the chain G, fixed at F, passes under the pulley B' of the compensating block B and round pulleys P<2>, P<3>, and is fastened to the traveller T. The hoisting-chain H passes round the pulleys B<2>, P and over the wheel of the traveller T to the load L. A third chain X is connected to T and passes over the pulley P<4>, rotatable wheel G, and pulley B<3>, its other end being fastened, say at P'. If the wheel G be rotated the chain X will pull down the block B or pull in T according to the direction of rotation. Provided the chain H is fixed the load L may be run in or out, parallel with the angle of inclination of the jib.
Patent GB-189705315-A (GB)
Title: Improvements in or relating to Pneumatic Tyres.
Inventor: HARMON NATHANIEL B
Filed: 1897-02-27
Granted: 1898-02-26
Abstract: 5315. Harmon, N. B. Feb. 27. Tyres, pneumatic ; felloes or rims.-The central circumferential rib A<1> divides the hollow of the rim A into two channels A<2>, A<3>, in one of which lies the inextensible edge C of the outer cover B. The cover passes round the air tube E, and overlaps the inextensible edge C so that the extensible edge D lies within the second channel A<3> of the rim. If desired, the inner air tube may be dispensed with.