baber/WOPTO huggingface dataset:
Patent KR-20070043553-A (KR)
Inventor: LEE DONG SUN
IPC: F25B1/00
Filed: 2005-10-24
Abstract: 본 발명은 히트펌프식 난방장치에 관한 것으로, 팽창변을 통과한 냉매가 상온의 상태를 유지토록 하여 팽창변의 작용으로 인한 주변 공기의 냉각을 막는 한편 압축기의 성능향상을 도모하여 높은 수준의 난방을 구현하고, 불필요한 증발기 등을 제거한 간단한 구성을 갖는 것이다. 
     이를 위한 본 발명은, 냉매를 압축하여 고온고압의 증기상태로 내보내는 압축기와, 상기 압축기와 연결되고 압축기에서 보내지는 증기상태의 냉매를 상온고압의 액체상태로 전환하여 열을 발생시키는 응축기와, 응축기 및 압축기와 연결되고 응축기에서 보내지는 냉매를 팽창시켜 압축기로 보내는 팽창변과, 응축기와 팽창변 사이에 설치되고 팽창변으로 들어가는 냉매를 가열하여 팽창변을 통과한 냉매의 상태가 상온저압이 되게 하는 메인히터를 포함하여 구성된다. 
       
     난방기, 히터, 냉난방기
Patent KR-20070044978-A (KR)
Inventor: KANG HYUNG JONG
IPC: G06F3/14
Filed: 2005-10-26
Abstract: 본 발명은 문서 파일의 내용을 디스플레이하는 방법 및 장치에 관한 것으로서, 그 방법은 선택된 문서파일의 기재내용을 추출하는 단계; 추출한 기재내용을 디스플레이하는 단계; 및 추출한 기재내용을 문서파일의 등록정보에 추가하는 단계를 포함함을 특징으로 한다. 
     본 발명에 의하면, 문서파일을 열지 않아도 사용자가 임의의 문서파일에 마우스를 통해 화살표만 갖다대면 화살표가 가리키는 상기 문서파일의 기재내용을 추출하여 사용자에게 디스플레이한다. 따라서 기존에 사용자가 문서파일의 내용을 확인하기 위해서는, 문서파일을 직접 열어보거나 미리 문서파일의 등록정보창에서 문서에 대한 정보를 입력해야 하는 불편을 없앨 수 있다.
Patent KR-20070045554-A (KR)
Inventor: HAM YOUNG BOG
IPC: F16K15/16
Filed: 2005-10-27
Abstract: 본 발명은 체크밸브에 관한 것으로, 더욱 상세하게는 압전 펌프나 다이아프램 펌프와 같이 고주파 펌핑 작용이 일어나는 소형 펌프에 사용되는 것으로 유체의 역류를 방지하고 응답성능이 우수하여 고속응답이 가능한 힌지형 박판 체크밸브에 관한 것이다. 
     본 발명에 따른 소형펌프에 장착되는 힌지형 박판 체크밸브는 유로관 내의 측벽에 고정되는 고정부와 상기 유로관의 유체 유입부 내경 보다 직경이 크고 유로를 개폐시키는 개폐부와 상기 고정부와 상기 개폐부를 연결시키는 탄성체로 이루어진 연결부로 구성되는 것을 특징으로 한다. 
       
     박판, 탄성 힌지, 체크밸브, 압전 펌프, 소형 펌프
Patent KR-20060052410-A (KR)
Inventor: DESOS PATRICE
IPC: C07D285/24
Filed: 2005-11-02
Abstract: 하기 화학식(I)의 화합물, 이의 이성질체 또는 이의 부가염 또는 약물: 
     
       
     
     상기 식에서, 
     R 1 은 하나 이상의 할로겐 원자로 치환되는 알킬기이고, 
     R 2 는 수소 원자, 할로겐 원자, 또는 OH이고, 
     R 3 는 비치환되거나 치환된 아릴기이다.
Patent KR-20070053984-A (KR)
Inventor: KIM JONG SOO
IPC: C09K11/55
Filed: 2005-11-22
Abstract: 본 발명은 근자외선에서 청색광 사이 영역의 광을 흡수하여 청색, 녹색 및 적색의 삼색을 발광하는 형광체 X 3   -y-   z MgSi 2 O 8     : yEu 2   +  : zMn 2   +  (여기서, X는 Ca, Sr, Ba로부터 선택되는 1종 이상의 금속이고, 0.005≤ y+z ≤0.3임)와 형광체 X 1   -y-   z MgSiO 4     : yEu 2   +  : zMn 2   +  (여기서, X는 Ca, Sr, Ba로부터 선택되는 1종 이상의 금속이고, 0.005≤ y+z ≤0.3) 및 형광체 X 1   -y-   z MgSi 2 O 6     : yEu 2   +  : zMn 2   +  (여기서, X는 Ca, Sr, Ba로부터 선택되는 1종 이상의 금속이고, 0.005≤ y+z ≤0.3임)와 그 제조방법에 관한 것이다. 또한 상기 각각의 형광체를 발광소자 칩의 파장 변환용으로 적용하여 발광 휘도 및 연색성이 우수한 백색광을 제공하여 LCD용 백색 광원 및 가정용 백색 조명등 등에 응용될 수 있는 백색 발광장치에 관한 것이다. 
       
     백색 발광 형광체, GaN 계열의 LED, 파장 전환, 백색 발광장치
Patent KR-20070056541-A (KR)
Title: T-dmb receiver test method
Inventor: PARK SANG GYU
IPC: H04N17/04
Filed: 2005-11-30
Abstract: A method for testing a terrestrial DMB(Digital Multimedia Broadcasting) receiver is provided to simultaneously identify a DMB receiving part and a DMB processing part by processing service data obtained from the DMB receiving part, thereby quickly identifying which part has a problem when an error occurs in the receiver. An external interface part(3) of a terrestrial DMB receiver outputs service data. A serial-to-USB(Universal Serial Bus) signal conversion part(4) transmits the outputted service data to a PC(Personal Computer). A part processes the service data received from the PC and outputs the processed service data to a screen. The serial-to-USB signal conversion part converts serial data of a high speed into parallel data of a low speed, converts the parallel data into a USB signal and transmits the USB signal to the PC.
Patent KR-20070056546-A (KR)
Title: Method and apparatus for controlling tuner
Inventor: PARK JIN SUCK
IPC: H04N5/50
Filed: 2005-11-30
Abstract: An apparatus and a method for controlling a tuner of an image device are provided to supply a clear image even in a weak electric field by detecting a correct electric field level according to a channel band and correctly operating a booster. A tuner circuit part(100) selectively amplifies a wireless frequency of a certain channel. An AGC(Automatic Gain Control) voltage/band determination part(200) detects an AGC value of the amplified wireless frequency and determines whether a booster(110) for amplifying a wireless frequency signal of the tuner circuit part to set electric field intensity is turned on or off in accordance with channel band information of a selected channel. A channel information storage part(400) stores channel band information of the wireless frequency. A control part(300) reads the channel band information of the certain channel from the channel information storage part, transmits the read channel band information to the AGC voltage/band determination part, and generates a control signal for turning on and off the booster according to the booster turning-on/off information from the AGC voltage/band determination part.
Patent KR-20070058148-A (KR)
Title: Method of streaming a melody selected by user to door-phone and home gateway system using the same
Inventor: CHO JI YOUNG
IPC: H04L12/66
Filed: 2005-12-01
Abstract: A method for streaming a melody selected by a user to a door phone and a home gateway system applied with the method are provided to stream the melody stored by being selected by the user to the door phone through a streaming server if the door phone connected through a home network senses a pressed state of the door phone. A user interface(110) provides an interface for enabling a user to select a desired melody. A memory unit(125) stores the melody selected through the user interface(110). A home gateway interface(130) receives a pressing detection signal generated by sensing a pressing action from a door phone(200). A streaming server(120) streams the pre-stored melody to the door phone(200). If the home gateway interface(130) receives the pressing detection signal, a controller(140) controls so that the streaming server(120) streams the melody to the door phone(200).
Patent KR-20070058816-A (KR)
Title: Silver organo-sol ink for forming conductive patterns
Inventor: HEO SOON YEONG
IPC: G03G9/08
Filed: 2005-12-05
Abstract: Provided is a silver organo-sol ink for forming conductive patterns, which has good physical properties and is applicable to the conventional printing method including an ink jet printer. The silver organo-sol ink for forming conductive patterns comprises an effective amount of an aromatic carboxylic acid represented by the following formula(1) and the balance of solvent for dissolving the aromatic carboxylic acid. In the formula(1), R1, R2, R3, R4, and R5 each is COO-Ag+, hydrogen, a hydroxyl group, or a C1-9 alkyl group and is identical to or different from one another. The organic solvent comprises a reactive organic solvent which forms a chelating agent or a complex with silver, and a polar or nonpolar dilution solvent for controlling viscosity.
Patent KR-20070059365-A (KR)
Title: Variable orifice structure of shock absorber
Inventor: AN CHANG SEOP
IPC: F16F9/12
Filed: 2005-12-06
Abstract: A variable orifice structure of a shock absorber is provided to automatically and appropriately adjust a diameter of an orifice hole to simplify structure of the shock absorber. A variable orifice structure of a shock absorber includes a piston rod(10), a piston head(11), and a plurality of orifice holes(12). The piston rod is provided with the piston head formed at its tip part and having a circular shape. The plurality of orifice holes are formed at the piston head. An arcuate adjustment projection(13) are formed at a center part of the orifice hole in a longitudinal direction that a diameter of the orifice hole can be reduced. The adjustment projection is formed of a rubber material or a spring projection having elasticity. An upper adjustment plate(14a) and a lower adjustment plate(14b) are installed at an upper surface and a lower surface of the piston head to be in contact with upper and lower edges of the adjustment projection.
Patent KR-20070087807-A (KR)
Title: Method and apparatus of storing and playing broadcasting program
Inventor: CHO EUN HYUNG
IPC: H04N5/78
Filed: 2005-12-15
Abstract: A method and an apparatus for storing and reproducing presentation information are provided to configure, store, and reproduce presentation information with at least one or more information of presentation AV(Audio/Video) data, photographing video data during a presentation, OSD(On Screen Display) data, and audio data, thereby satisfying various desires of a user. A method for storing and reproducing presentation information comprises the following steps of: receiving and storing presentation data(204); storing audio data inputted from a microphone to be synchronized with the storage of the presentation data(206); and reading and reproducing the presentation data and reading and outputting the audio data by synchronizing the presentation data.
Patent KR-20070063808-A (KR)
Title: Phase change ram device and method of manufacturing the same
Inventor: CHANG HEON YONG
IPC: H01L27/115
Filed: 2005-12-15
Abstract: A phase change memory device and its manufacturing method are provided to reduce effectively the current necessary for a phase change by reducing a contact area between a phase changeable layer and an upper electrode using a porous hemi-spherical Al2O3 layer. A lower pattern is formed on a semiconductor substrate(21). A first electrode is formed on the resultant structure to contact the lower pattern. A phase changeable layer(24a) is formed on the first electrode. A porous hemi-spherical Al2O3 layer(25a) is formed on the phase changeable layer. The porous hemi-spherical Al2O3 layer is capable of exposing partially the phase changeable layer to the outside. A second electrode is formed on the resultant structure.
Patent KR-20070063820-A (KR)
Title: Method of manufacturing semiconductor device
Inventor: KIM JUN KI
IPC: H01L21/28
Filed: 2005-12-15
Abstract: A method for fabricating a semiconductor device is provided to prevent resistance of a contact plug from being increased by forming a sacrificial seed layer on a surface of a contact hole which is removed by reaction of source gas. An interlayer dielectric(420) is formed on a semiconductor substrate(400) having a lower conductive layer(410), and then is etched to form a contact hole(H) exposing the lower conductive layer. A sacrificial seed layer is formed on a surface of the contact hole and the interlayer dielectric. The sacrificial seed layer formed on the interlayer dielectric is converted into a bonding film(430a). The contact hole is filled with a metal film, and the metal film is formed on the bonding film.
Patent KR-20070063845-A (KR)
Title: Steering column vibration prevented motor driven power steering system in vehicle
Inventor: CHA WOO JIN
IPC: B62D7/22
Filed: 2005-12-15
Abstract: A steering column vibration isolation structure of a motor-driven power steering system for a vehicle is provided to prevent the vibration and noise occurrence and to make an assembling work simple by removing the play of components when fastening a power head. The invention relates to a steering column vibration isolation structure of a motor-driven power steering system for a vehicle, which includes a power head(4) with a built-in reduction gear converting the turning force of a motor driven by sensor measurement values according to the operation of the steering wheel into vehicle steering force to a steering column(2) provided with a tilt-telescopic device(3) adjusting the axial length of a steering shaft(1) or the angle of a steering shaft, wherein a fastening member for fixing the power head on a vehicle body comprises a hinge bracket(5) locating a motor and a reduction gear of the power head on the steering column and penetrating with the steering shaft, a hinge fastening end(6) formed to the appointed thickness to have a through hole from the top of the hinge bracket to the inside, lower mounting brackets(7) located on two ends of the hinge fastening end and a hinge fixing member fitted to get out of the other side after passing through the hinge fastening end from one side of the lower mounting bracket to generate the fixing strength of the steering column by the lower mounting bracket.
Patent KR-20070066775-A (KR)
Title: Tray structure of a car
Inventor: CHO JOUNG HWAN
IPC: B60R7/04
Filed: 2005-12-22
Abstract: A tray structure of a vehicle is provided to prevent a tray from being optionally opened due to sudden start or braking by installing a rotating member preventing a backing of a tray. A tray structure of a vehicle includes a tray housing portion(2), a tray(4), a latch member(6), and a rotating member(10). The tray housing portion is provided inside of the vehicle. The tray is mounted at the tray housing portion to advance or back. The latch member is mounted inside the tray housing portion to advance or back. When the tray advances or backs, the latch member advances or backs to engage or separated with or from the tray. The rotating member is eccentrically hinge-coupled to the latch member. A stopper is formed at a predetermined position of the rotating member. When the vehicle is accelerated, the rotation member rotates to prevent a backing of the latch member by the stopper.
Patent KR-20070068518-A (KR)
Title: Apparatus for detecting condition power-train in heavy equipment
Inventor: KIM KYEONG KEUN
IPC: B60W50/02
Filed: 2005-12-27
Abstract: An apparatus for detecting condition of power-train in heavy equipment is provided to sense the abnormality inside the power-train in advance and warns a user of such abnormality to prevent damage of a rotating body. The apparatus for detecting condition of power-train in a heavy equipment includes an input shaft, plural rotating bodies, a first sensor unit(100), a second sensor unit(110), an analyzer(120), a memory portion(140), a control portion(150) and plural warning lamps(160). The control portion(150) compares the reference frequency value and the reference vibration value of each rotating body of the memory portion(140) and the frequency or vibration of each rotating body of the second sensor unit(110), and decides that the rotating body is abraded and damaged and outputs a control signal when the frequency and vibration of each rotating body input from the second sensor unit are greater.
Patent KR-20060004639-A (KR)
Inventor: KIM SUEK HYUN
IPC: C02F1/58
Filed: 2005-12-29
Abstract: 본 발명은 불소가 함유된 폐수를 처리하는 시스템에 관한 것으로서, 보다 상세하게는 생산 공정에서 발생하는 일반적인 불소를 포함한 폐수뿐만 아니라 분해가 잘 되지 않는 난분해성 불소 화합물도 함께 처리할 수 있는 불소함유 페수 처리 시스템에 관한 것이다.  
     본 발명에 따른 난분해성 불소함유 폐수 처리 시스템은, 집수조, 반응조와 침강조로 구성되어 불화칼슘의 형태로 불소를 제거하는 제1 공정과, 난분해성 불소화합물을 가수분해하여 분해가 용이한 불소로 분리한 후 불화칼슘의 형태로 불소를 제거하는 제2 공정으로 이루어지는데, 이때 상기 난분해성 불소 화합물의 가수분해를 수행하는 고온고압 반응기는 반응에 최적의 온도, 압력, pH를 가지도록 폐수를 이송하는 폐수이송관과, 고압의 공기를 주입하는 공기주입관과, 뜨거운 공기를 주입하는 스팀주입관과 연통되고, pH조절 및 난분해성 불소 물질의 분해효율을 높이기 위한 약품을 주입하는 약품주입관과, 내부에 교반장치와 검침계, 배출관을 포함하여 구성한다.  
     이와 같이 구성한 본 발명은, 난분해성 불소 화합물을 처리가 용이하도록 가수분해하기 때문에 불소함유 폐수로부터 불소제거효율을 극대화한다.  
     또한, 고농도 불소함유 폐수처리에 적용가능(원수 HF농도 5000~10000ppm)하여 원수 농도변화에 영향 받지 않고 안정적으로 처리 가능하고, 보통의 경우 1차공정의 1단처리만으로도 불소농도 10ppm 이하 처리가 가능하다.  
       
     붕불화수소산, 난분해성 불소함유 폐수, 불소, 고온고압 반응기, 가수분해.
Patent KR-20070071306-A (KR)
Title: Substrates adhesion apparatus
Inventor: LEE YOUNG JONG
IPC: G02F1/1339
Filed: 2005-12-30
Abstract: An apparatus for bonding substrates is provided to remove external particles remaining on an electrostatic chuck when the substrates are loaded on or unloaded from the electrostatic chuck, by activating molecules of gas, which is continuously jetted to the electrostatic chuck. An apparatus bonds an upper substrate and a lower substrate by using an upper electrostatic chuck(124) and a lower electrostatic chuck(126) installed within a chamber. Gas supply lines(128,130) are respectively installed on surfaces of the electrostatic chuck to supply gas to the electrostatic chuck. An ultrasonic wave generator(140) generates ultrasonic vibration in the gas supplied to the electrostatic chuck. A driver is installed to move the ultrasonic wave generator on the surfaces of the electrostatic chuck within the chamber.
Patent KR-20050035871-A (KR)
Inventor: CLIFFORD NICHOLAS GUY
IPC: A63B69/00
Filed: 2003-07-29
Abstract: A recreation range system (10) including a field (11) and a rotatable range carousel (13).
Patent KR-20050059118-A (KR)
Title: Information processing device and method, recording medium, and program
Inventor: URANO NAOMI
IPC: G06Q50/10
Filed: 2003-08-27
Abstract: An information processing device and method, a recording medium, and a program capable of easily adding, deleting, and replacing use condition items set for a digital content. A data acquisition section (91) requests a content distribution device to supply a digital content. The digital content supplied in response to this and use condition information are output to a data storage section (95). Furthermore, in response to a request from a use condition judgment section (93), the data acquisition section (91) requests the content distribution device to supply use condition plug-in modules (94). The use condition judgment section (93) activates only those corresponding to the use condition item among the use condition plug-in modules (94) and reports to a reproduction section (92) a judgment result whether the use condition item is satisfied. According to this judgment result, a reproduction section (92) reproduces a digital content.
Patent KR-20050035297-A (KR)
Title: Method for controlling the current consumption of an electronic appliance
Inventor: ELSHOLZ KARSTEN
IPC: G06F1/32
Filed: 2003-09-03
Abstract: The invention relates to a method for controlling the current consumption of an electronic appliance comprising a data interface suitable for data transfer. Data transfers occurring during said method are controlled and detected and the current consumption of the electronic appliance is controlled according to the detected data transfers. The invention also relates to an electronic appliance comprising at least the following elements: a data interface for carrying out data transfers, a control unit for controlling and detecting data transfers, and a regulating unit which is coupled to the control unit and is used to control and adjust the current consumption according to the detected data transfers.
Patent KR-20050043940-A (KR)
Title: Pixel structure in an electroluminescent display device
Inventor: LIEDENBAUM COEN T H F
IPC: H01L27/32
Filed: 2003-08-04
Abstract: An electroluminescent device (200) for use, e.g., in a colour matrix display unit is presented. Picture elements comprise a plurality of electroluminescent sub-pixels (201,202,203) capable of emitting light when subject to electric current. The sub- pixels each have a degradation lifetime and an emissive area (211,212,213) and, for any pair of first and second sub-pixels in a picture element, the ratio between the first sub-pixel emissive area and the second sub- pixel emissive area is inversely proportional to the ratio between the degradation lifetime of said first sub-pixel and the degradation lifetime of the second sub-pixel.
Patent KR-20050057465-A (KR)
Title: Improvement in and relating to gas cleaning devices
Inventor: KUKLA PETER
IPC: F01N13/02
Filed: 2003-09-22
Abstract: There is disclosed a gas cleaning device (4) comprising a gas inlet (6), a gas outlet (8) and a path of fluid communication (10) between the gas inlet and gas outlet, a filter (14) in the path of fluid communication and ionising means (16), which ionising means is at least partly within the filter. A vehicle (3) incorporating such a gas cleaning device in the exhaust gas flow path of an exhaust (2) thereof is also disclosed.
Patent KR-20050053760-A (KR)
Title: Paste ejection apparatus
Inventor: SASAGURI SHINJI
IPC: F04B1/20
Filed: 2003-09-19
Abstract: In a seal mechanism which constitutes a port switching portion in a pump mechanism of a paste ejection apparatus that ejects paste, and which prevents leakage of the paste from a seal portion between a plunger block rotating with a plunger and a fixed seal block (between a seal surface and a sliding surface), a housing portion is formed by opposing an outer surface provided for the seal block to an inner surface extending axially from the cylinder block, and a ring- shaped external seal member formed by combination of an 0-ring and self- lubricant material such as PTFE is attached into the housing portion. Hereby, it is possible to prevent the paste that has leaked from the seal portion from leaking to the outside of the housing portion by the external seal member.
Patent KR-20050053761-A (KR)
Title: Association of the h2 haplotype of the p2y12 receptor with an increased risk for thrombosis and peripheral arterial disease
Inventor: FONTANA PIERRE
IPC: C12Q1/68
Filed: 2003-10-14
Abstract: The invention relates to an in vitro method for determining the risk of developing thrombosis in a subject, and to an in vitro method for determining sensitivity of a subject toward a thienopyridine therapy. Both methods involve identifying a particular haplotype of the P2Y12 receptor gene.
Patent KR-20050084081-A (KR)
Title: Multi-point service injection in a broadcast system
Inventor: VERHAEGH WILHELMUS F J
IPC: H04N7/173
Filed: 2003-11-06
Abstract: A broadcast system for broadcasting data streams includes a hierarchical network of data distributors starting from one central distributor (110) through at least one layer of intermediate distributors (120, 130, 140) to a plurality of broadcast receivers (150). Data streams are broadcast through downstream channels (160) of the network to the plurality of broadcast receivers. At least one distributor hierarchically below the central distributor is operative to insert broadcast data in at least one up-stream channel (170) of the network towards the central distributor. The central distributor is arranged to re-distribute broadcast data received via at least one up- stream channel through at least one downstream channel of the network.
Patent KR-20050103277-A (KR)
Title: Method for producing polyorganosiloxane particles and for producing silica particles
Inventor: SUZUKI TARO
IPC: C01B33/18
Filed: 2004-02-24
Abstract: A method for producing polyorganosiloxane particles wherein such particles are produced through a step of subjecting a silicon compound having a non-hydrolyzable group and a hydrolyzable alkoxy group both bonded to a silicon atom to hydrolysis and condensation in the presence of a catalyst, to thereby form seed particles comprising polyorganosiloxane particles and prepare a fluid containing above seed particles and a step of adding an aqueous fluid for enhancing the particle diameter thereof comprising the above silicon compound or a hydrolyzate thereof to said fluid containing seed particles, characterized in that it comprises measuring a particle diameter continuously or at predetermined periods of time in the above seed particle growth step and stopping the reaction at the time when an objective particle diameter is achieved.
Patent KR-20050093844-A (KR)
Title: Embedding multiple watermarks
Inventor: BRUEKERS ALPHONS A M L
IPC: G10L19/018
Filed: 2003-12-16
Abstract: In order to enable a data signal, such as an audio or video signal, to be marked with multiple watermarks a set of different codes or keys is used within a given application field. The set of codes/keys is known to a watermark embedder (20) and a watermark detector (22). In each watermark embedding step, whether it is a first embedding step or a subsequent embedding step, a different key is used. The embedder (22) includes a data extractor (24) for determining which key or keys has or have been used previously. A data generator (26) then selects a new key from the set of known keys.
Patent KR-20050109516-A (KR)
Title: Riser pipe support system and method
Inventor: WYBRO PIETER G
IPC: B63B21/50
Filed: 2004-02-27
Abstract: A system and method for mating risers or umbilicals extending vertically or near vertically from the ocean floor to a floating offshore system such as a TLP or semisubmersible platform. The risers or umbilicals are suspended vertically above the vessel's keel and are supported laterally near the platform's keel by keel guides or riser receptacles positioned along the submerged perimeter of the vessel's hull, or within the hull by production riser slots disposed in the bottom of the hull. The keel guides or production riser slots each receive a keel joint assembly which laterally supports a. riser or umbilical passing therein while providing a bearing surface for free vertical movement of the riser.