baber/WOPTO huggingface dataset:
Patent TW-202243353-A (TW)
Title: Gas treatment apparatus
Inventor: SAEGUSA YUJI
IPC: H01R43/26
Filed: 2022-03-08
Abstract: There is provided a gas treatment apparatus for performing gas treatment on a substrate. The gas treatment apparatus includes: a chamber in which the substrate is accommodated; a gas supply mechanism configured to individually supply a fluorine-containing gas and an alkaline gas; and a gas introduction member configured to cause the fluorine-containing gas and the alkaline gas supplied from the gas supply mechanism to merge with each other and introduce a mixed gas in which the fluorine-containing gas and the alkaline gas are mixed into the chamber. A portion of the gas introduction member including a merging point of the fluorine-containing gas and the alkaline gas is made of an aluminum-based material. A resin coating is formed on at least the portion including the merging point.
Patent TW-202303225-A (TW)
Title: Pvh in-band chromatic correction using metasurface
Inventor: SILVERSTEIN BARRY DAVID
IPC: G02B27/44
Filed: 2022-04-07
Abstract: An optical device includes an optical component (e.g., a polarization volume hologram, a geometric phase device, or a polarization-insensitive diffractive optical element) having a uniform thickness and configured to modify a wavefront of a light beam that includes light in two or more wavelengths visible to human eyes, where the optical component has a chromatic aberration between the two or more wavelengths. The optical device also includes a metasurface on the optical component. The metasurface includes a plurality of nanostructures configured to modify respective phases of incident light at a plurality of regions of the metasurface, where the plurality of nanostructures is configured to, at each region of the plurality of regions, add a respective phase delay for each of the two or more wavelengths to correct the chromatic aberration between the two or more wavelengths.
Patent TW-202308689-A (TW)
Title: High concentration bispecific antibody formulations
Inventor: KNOBLAUCH ROLAND
IPC: A61P35/00
Filed: 2022-04-20
Abstract: Provided herein are stable aqueous pharmaceutical compositions comprising high concentration formulations of a bispecific epidermal growth factor receptor (EGFR)/hepatocyte growth factor receptor (c-Met) antibody and methods of preparing the same. Also provided herein are methods of treating cancer in a subject in need thereof by subcutaneously administering to the subject the stable aqueous pharmaceutical compositions as disclosed herein.
Patent TW-202319592-A (TW)
Inventor: LAI CHIA-SHENG
IPC: C25D5/08
Filed: 2022-04-25
Abstract: 提供一種電鍍系統中的基座結構。基座結構包含：包含：環形構件；接觸環，附接至環形構件的內表面且用以在電鍍製程中電連接至晶圓；及一對屏蔽結構，附接至環形構件的上表面且在垂直方向上延伸。該對屏蔽結構中的每一者包含：彎曲板材，包括複數個排放開口，其中電鍍液殘留物在清洗過程中經由複數個排放開口排放；及複數個斜面，複數個斜面中的每一者對應於複數個排放開口中的每一者且用以在清洗過程中朝向對應排放開口引導電鍍液殘留物。
Patent TW-202307954-A (TW)
Title: Cleaning method and plasma treatment method
Inventor: SASAKI JUNICHI
IPC: H01L21/683
Filed: 2022-05-18
Abstract: A cleaning method according to the present disclosure comprises a first cleaning step and a second cleaning step. The first cleaning step comprises a step for supplying a first treatment gas into a chamber, and a step for generating, in a space defined by a mounting region and an electrode, a first plasma from the first treatment gas to clean a region of the mounting base including the mounting region. The second cleaning step comprises: a step for holding the dummy substrate opposite to the mounting region at a predetermined position a predetermined distance away from the mounting region; a step for supplying a second treatment gas into the chamber; and a step for generating, in a space defined by the dummy substrate being held at the predetermined position and the electrode, a second plasma from the second treatment gas to clean a region of the mounting base including an area around the mounting region.
Patent TW-202302512-A (TW)
Title: Method for preparing 2, 5-hexanedione by catalyzing and converting biomass by one-pot synthesis
Inventor: Yang wei-min
IPC: C07C45/57
Filed: 2022-05-20
Abstract: Disclosed in the present invention are a biphasic solvent system for converting a biomass to prepare 2, 5-hexanedione and a method for using same to prepare 2, 5-hexanedione by catalyzing and converting a biomass by one-pot synthesis. The method comprises: in a multiphase system formed of an organic solvent, an inorganic salt, and water, using hydrogen as a hydrogen source, and making a biomass feedstock in contact with a hydrogenation catalyst for reaction to obtain 2, 5-hexanedione. The hydrogenation catalyst comprises a hydrogenation active component and a carrier, wherein the carrier is selected from one or more of hydrophobic activated carbon and graphene. According to the method of the present invention, high-efficiency conversion of the biomass can be achieved in the absence of an acid catalyst, and the selectivity of the product 2, 5-hexanedione is very high.
Patent TW-202305427-A (TW)
Title: Waveguide illuminator having slab waveguide portion
Inventor: KOSHELEV ALEXANDER
IPC: G02B6/122
Filed: 2022-05-25
Abstract: A waveguide illuminator includes adjacent linear and slab waveguide areas. An input light beam is guided in a linear waveguide, is split into a plurality of sub-beams to propagate in individual linear waveguides to a slab waveguide area and form an output light beam in the slab waveguide area. An array of out-couplers is disposed in the slab waveguide area. The array of out-couplers out-couples portions of the output light beam forms an array of out-coupled beam portions for illuminating a display panel. Locations of the array of out-couplers are coordinated with locations of individual pixels of the display panel, thereby improving efficiency of light utilization by the display panel.
Patent TW-202311356-A (TW)
Title: Di(meth)acrylate, photocurable resin composition and photocurable resin composition for adhesives
Inventor: NAGASAWA ATSUSHI
IPC: C08G65/332
Filed: 2022-06-28
Abstract: This invention provides a photocurable resin composition having low viscosity before curing, excellent in low-temperature storage, and having excellent water resistance, bending resistance, and transparency in the film obtained after curing, and provides a photocurable resin composition for an adhesive having excellent applicability to uneven surfaces and is transparent, capable of forming a cured product (adhesive layer) having excellent adhesiveness to uneven substrates, flexibility when bent, and high water-resistant adhesiveness. 
 
     Provided is a photocurable resin composition is a di(meth)acrylate represented by the following general formula (1), and contains Component (A): 30 to 100% by mass of the di(meth)acrylate (A), and Component (B1): urethane (meth)acrylate (B1) in an amount of 0 to 70% by mass based on 100% by mass of the monomer component. 
 
     
       
         
       
     
     (wherein, R represents a hydrogen atom or a methyl group, n represents the average number of added moles of oxytrimethylene groups, and is a real number of 5 to 90.) , and a photocurable resin composition for adhesives containing (A) component: the di(meth) acrylate (A); (B) 
component: polymerizable Oligomer (B) having two or more (meth)acryloyl groups in one molecule; and (C1) component: monofunctional (meth)acrylate monomer (C1); and based on 100% by mass of the total content of component (A), component (B) and component (C), the content of component (A) is 1 to 50% by mass, the content of component (B) is 15 to 98% by mass, and the content of component (C1) is 1 to 35% by mass.
Patent TW-202303794-A (TW)
Title: System for sorting silicon wafers
Inventor: ZHANG GE
IPC: H01L21/66
Filed: 2022-08-09
Abstract: The embodiment of the invention discloses a system for sorting silicon wafers, and the system comprises a conveyor belt which is used for conveying a plurality of silicon wafers to a processing station, a detector and a moving-out device; the detector is used for detecting the thickness value of each conveyed silicon wafer; and the moving-out device is arranged between the detector and the processing station, and is used for moving out the silicon wafers of which the thickness values do not meet the requirements of the processing station from the conveying beltt in the process of conveying the plurality of silicon wafers.
Patent TW-202322805-A (TW)
Title: Heterocyclic compounds with cyclin-dependent kinase inhibition activity, a preparation method and medical use thereof
Inventor: YAN XU
IPC: A61K31/435
Filed: 2022-09-26
Abstract: The present invention relates to heterocyclic compounds with cyclin-dependent kinase inhibition activity, a preparation method and medical use thereof. Specifically, the present invention relates to the compound represented by the general formula (I), its preparation method, the pharmaceutical composition containing the same, and its use as a cyclin-dependent kinase (CDK) inhibitor in the prevention and/or treatment of abnormal cell growth such as cancer. The definition of each group in the general formula (I) is the same as that in the specification.
Patent TW-202334429-A (TW)
Inventor: LIN KUO-I
IPC: C12N15/13
Filed: 2022-09-30
Abstract: 本發明係關於一種特異性結合至SARS-CoV-2之棘蛋白的抗體或其抗原結合片段。本發明亦關於一種醫藥組合物、一種用於治療及/或預防有需要之個體之由冠狀病毒引起之疾病及/或病症的方法及一種用於偵測樣品中之冠狀病毒的方法。
Patent TW-202320722-A (TW)
Inventor: WANG WILLIAM WEI
IPC: A61F9/008
Filed: 2022-10-18
Abstract: An optical system and an operating method thereof are disclosed. The optical system includes a light source device, a gaze module and a fundus detection device. The light source device includes a light source module, a light intensity modulation module and a lens module. The light source module is used to emit a therapeutic light to an eye. The light intensity modulation module is used to modulate an intensity of the therapeutic light. The lens module is used to control a depth of the therapeutic light. The gaze module is used to be gazed by the eye to fix a fundus of the eye. The fundus detection device and the light source device are integrated to detect the fundus to obtain a fundus image.
Patent TW-202333283-A (TW)
Title: Centering device, centering method and substrate processing apparatus
Inventor: UENO HIROYUKI
IPC: H01L21/68
Filed: 2022-10-28
Abstract: According to the present invention, a substrate is surrounded in a horizontal plane on an upper surface of a substrate support by a first abutting member located at a first reference position, a second abutting member located at a second reference position, and a third abutting member located at a third reference position. The three abutting members make tiny movements repeatedly to get closer to the substrate gradually while distances from the center of the substrate support are kept equally. While the abutting members make the movements of getting closer to the substrate, the abutting members abut on the substrate successively to move the substrate horizontally toward the center of the substrate support. As a result, at a time when the substrate is nipped with the three abutting members, the center of the substrate is aligned with the center of the substrate support to complete a centering operation.
Patent TW-202329006-A (TW)
Title: Electronic apparatus for providing information to terminal of delivery person and method thereof
Inventor: KIM NAM HEE
IPC: G06Q10/08
Filed: 2023-01-05
Abstract: Provided is an electronic apparatus for providing information to a terminal of a delivery person, and a method thereof. According to the present disclosure, the electronic apparatus identifies a reference location of the delivery person, identifies at least one piece of area information included in a first geographical range including the reference location, identifies delivery order information of each area, and provides the terminal of the delivery person with a first page including a map for the first geographical range, and at least one first type icon displayed on the map and corresponding to the each area.
Patent TW-202333221-A (TW)
Inventor: Tang han-yu
IPC: H01L21/306
Filed: 2023-01-10
Abstract: A method includes forming a plurality of semiconductor regions on a wafer, placing the wafer in an etching chamber, globally heating the wafer using a heating source, and projecting a laser beam on the wafer. When the wafer is heated by both of the heating source and the laser beam, the plurality of semiconductor regions on the wafer are etched.
Patent TW-202332236-A (TW)
Inventor: SHABARA YAHIA AHMED MAHMOUD MAHMOUD
IPC: H04L25/02
Filed: 2023-01-17
Abstract: 用於壓縮通道狀態資訊（CSI）的第一設備的第一處理電路將CSI元素分類成複數個CSI元素類別中的一個，每個CSI元素類別與複數個編碼器中的不同的一個相關聯。第一處理電路基於與複數個CSI元素類別中的一個相關聯的複數個編碼器中的一個壓縮CSI元素，並將已壓縮CSI元素和複數個CSI元素類別中的一個的類別索引發送到第二設備。用於解壓CSI元素的第二設備的第二處理電路接收已壓縮CSI元素和類別索引，每個CSI元素類別與複數個解碼器中的不同的一個相關聯，第二處理電路基於類別索引確定複數個解碼器中的一個，並根據確定的解碼器對CSI元素進行解壓縮，獲得已解壓縮CSI元素。
Patent TW-202330992-A (TW)
Inventor: KIM DUCK-HO
IPC: C23C16/455
Filed: 2023-01-30
Abstract: The present invention relates to a method of manufacturing a thin film, including: an adsorption step of injecting a source gas including a high-k dielectric material to adsorb the high-k dielectric material onto a substrate; a deposition step of injecting a reactant gas reacting on the source gas to deposit a thin film including the high-k dielectric material on the substrate; and a crystallization step of crystallizing the high-k dielectric material by using plasma, and a thin film.
Patent TW-202325880-A (TW)
Title: Alkoxydisiloxanes and dense organosilica films made therefrom
Inventor: XIAO MANCHAO
IPC: C23C16/40
Filed: 2021-10-20
Abstract: A method for making a dense organosilicon film with improved mechanical properties includes the steps of: providing a substrate within a reaction chamber; introducing into the reaction chamber a gaseous composition comprising alkoxydisiloxane; and applying energy to the gaseous composition comprising alkoxydisiloxane in the reaction chamber to induce reaction of the gaseous composition comprising alkoxydisiloxane to deposit an organosilicon film on the substrate, wherein the organosilicon film has a dielectric constant of from ~ 2.50 to ~ 3.30, an elastic modulus of from ~ 6 to ~ 35 GPa, and an at. % carbon of from ~ 10 to ~ 40 as measured by XPS.
Patent UA-40397-A (UA)
Title: Спосіб термічної обробки виробів
Inventor: BYKOV LEONID VSEVOLODOVYCH
Filed: 2001-01-03
Abstract: Реферат Спосіб термічної обробки виробів полягає у тому, що прокатування, гартування, та відпуск (самовідпуск) проводять у накопичувальній ємності з кришкою і завантажувальним отвором. При завантаженні й витримуванні виробів накопичувальну ємність тримають накритою кришкою.
Patent UA-50913-A (UA)
Inventor: KRYZHANIVSKYI YEVSTAKHII IVANOVYCH
Filed: 2001-02-27
Abstract: 灁汰慩据⁥潦⁲湩汣湩摥搠楲汬湩⁧景眠汥獬栠獡猠牰湩ⵧ畳灰牯整⁤汢摡獥椠獮慴汬摥椠⁮桳灡摥猠潬獴漠⁦桴⁥潨獵湩⁧楷桴瀠獯楳楢楬祴漠⁦楤灳慬散敭瑮椠⁮潬杮瑩摵湩污搠物捥楴湯愠⁴湡汧⁥潴琠敨愠楸⁳景琠敨愠灰楬湡散‬瑡琠慨⁴湩琠敨猠潬獴愠摮椠⁮汢摡獥椠⁮慰物⁳祣楬摮楲慣⁬灯湥湩獧漠⁦慳敭搠慩敭整⁲牡⁥牰癯摩摥‬硡敬⁳景琠潨敳愠敲椠⁮桴⁥潬杮猠捥楴湯漠⁦桴⁥灡汰慩据⁥湡⁤湩整獲捥⁴湯琠敨挠湯慴瑣漠⁦睴⁯敤慴汩ⱳ愠摮椠⁮慥档瀠楡⁲景漠数楮杮⁳⁡慢汬椠⁳汰捡摥※敢楳敤⁳桴瑡‬敤瑰⁨景琠敨漠数楮杮⁳慭敤椠⁮桴⁥汳瑯⁳湡⁤湩琠敨戠慬敤⁳獩爠獥数瑣癩汥⁹浳污敬⁲湡⁤慬杲牥琠慨⁮桴⁥慢汬⁳楤浡瑥牥㭳愠摮椠⁮桴⁥灵数⁲慰瑲漠⁦桴⁥汢摡獥‬祢洠慥獮漠⁦桴敲摡摥樠楯瑮ⱳ挠湯牴汯猠牣睥⁳牡⁥湩瑳污敬⹤䤠灭敬敭瑮瑡潩⁮景琠楨⁳灡汰慩据⁥桳污⁬慭敫椠⁴潰獳扩敬琠⁯牰癯摩⁥潣瑮潲汬湩⁧景搠晥敬瑣湩⁧潦捲⁥湯琠敨戠瑩愠摮‬獡愠爠獥汵ⱴ漠⁦湩整獮瑩⁹景琠敨眠汥⁬畣癲湩Ⱨ琠畨⁳硥慰摮湩⁧整档潮潬楧慣⁬潰獳扩汩瑩敩⁳景愠灰楬慣楴湯漠⁦桴⁥灡汰慩据⁥瑡搠楲汬湩⁧湩汣湩摥眠汥獬മ
Patent UA-43734-A (UA)
Title: Спосіб приведення експоната зброї до небоєздатного стану
Inventor: Kozlov Oleksandr Fedorovych
Filed: 2001-07-10
Abstract: Спосіб приведення експонатів зброї до небоєздатного стану полягає у жорсткій фіксації затворної рами до ствольної коробки. Після фіксації рухомих елементів зброї до її нерухомих частин, зразок зброї розрізають у площині симетрії вздовж подовжньої осі зброї на дві частини.
Patent UA-52277-A (UA)
Title: Method of forecasting early maturity of pigs in early age
Inventor: PAVLIV BOHDAN ANDRIIOVYCH
Filed: 2002-04-02
Abstract: A method of forecasting the early maturity of pigs in early age envisages the selection of boar pigs and female pigs at the age of two months according to their origin, the development and live weight and the selection thereof at the beginning of control growing according to the enzyme test. Indices of the activity of blood, phosphoglucomutase, glucose phosphatisomerase and aldolase are used as the enzyme test. Testing according to the activity of enzymes is carried out once at the age of 3.5-4 months.
Patent UA-53410-A (UA)
Title: Executive body of ripper
Inventor: BALADINSKYI VADYM LEONIDOVYCH
Filed: 2002-05-20
Abstract: Executive body of ripper machine has multi-chain suspension with wedge knife. Rear part of the wedge knife is fixed at the lower frame in a hinged way. At that, the hinges are connected with hydro-cylinder acting on front part of the wedge knife. The wedge knife in auto-vibration mode is connected to hydro-cylinder by means of special hydraulic units.
Patent UA-67982-A (UA)
Title: A method for the production of muscat sparkling wine
Inventor: KOVALIOV MYKOLA MYKOLAIOVYCH
IPC: C12G1/06
Filed: 2003-07-29
Abstract: A method for the production of Muscat sparkling wine provides for blending champagne wine materials and mixes with clarification thereof, reducing content of general nitrogen in the blend to 40-80mg/dm3 by fermentation of the latter and filtering thereof and subsequent carrying out the champagnization process. Reduction of general nitrogen content in the blend, clarification and filtering thereof are performed in one stage by introduction of starter to the blend at an amount of 3.0-5.0 mln.kl/cm3 with fermentation thereof to the required content of general nitrogen, additional introduction of aqueous suspension of natural disperse mineral paligorskite at an amount of 0.5-0.8 g/dm3, mixing the mixture and settling thereof.
Patent AP-1224-A (AP)
Title: Biphasic controlled release delivery system for high solubility pharmaceuticals and method.
Inventor: TIMMINS PETER
IPC: A61K31/155
Filed: 1999-03-10
Granted: 2003-11-14
Abstract: A biphasic controlled release delivery system for pharmaceuticals which have high water solubility, such as the antidiabetic metformin HC1 salt, is provided which provides a dosage form that has prolonged gastric residence and includes (1) an inner solid particulate phase formed of substantially uniform granules containing a pharmaceutical having a high water solubility, and one or more hydrophilic polymers, one or more hydrophobic polymers and/or one or more hydrophobic materials such as one or more waxes, fatty alcohols and/or fatty acid esters, and (2)an outer solid continuous phase in which the above granules of inner solid particulate phase are embedded and dispersed throughout, the outer solid continuous phase including one or more hydrophilic polymers, one or more hydrophobic polymers and/or one or more hydrophobic materials such as one or more waxes, fatty alcohols and/or fatty acid esters, which may be compressed into tablets or filled into capsules. Methods for informing the so-described biphasic controlled release delivery system and using such biphasic controlled release delivery system and using such biphasic controlled release delivery system for treating diabetes are also provided.
Patent DO-P2014000100-A (DO)
Title: Terapia de combinación para cáncer de ovario
Inventor: CHAN EDWARD MICHAEL
IPC: A61K33/243
Filed: 2014-05-09
Abstract: La presente invención se refiere a un método para tratar cáncer de ovario en un mamífero en necesidad de tal tratamiento que comprende administrar una cantidad efectiva de una combinación de gencitabina, cisplatino o carboplatino, y 5-[2-terc-butil-5-(4-fluoro-fenil)-1H-imidazol-4-il]-3-(2,2-dimetil-propil)-3H-imidazo[4,5-b]piridin-2-ilamina.
Patent EC-SP10010288-A (EC)
Title: Vectores de virus oncolíticos de viruela
Inventor: ERBS PHILIPPE
IPC: A61K35/768
Filed: 2010-06-18
Abstract: La presente invención se relaciona con un virus de la viruela que comprende un gen defectuoso F4L y/o I4L, con composiciones que comprenden tal virus de la viruela y con métodos y uso de tales composiciones y con virus de viruela para propósitos terapéuticos, y más particularmente para el tratamiento del cáncer.
Patent EC-SP11011164-A (EC)
Title: Derivados de 2-piridin-2-il-pirazol-3(2h)-ona, su preparación y su aplicación en terapéutica
Inventor: FOSSEY VALERIE
IPC: A61K31/4162
Filed: 2011-06-27
Abstract: La invención se refiere a los compuestos que responden a la fórmula (I), en estado de base o de sal por adición de un ácido: (I) en la cual n es igual a 0, 1, 2, 3 o 4 ; m es igual a 0, 1 o 2 ; o es igual a 0 o 1; X representa un grupo -CH2, -CH(R')-, -NH(R')- o un heteroátomo seleccionado entre O y S, entendiéndose que R' representa un grupo alquilo(C1-C5)alquilo, alcoxi(C1-C5), -CH2-arilo, -C(O)R5 o -COOR5; R1 representa un grupo oxo, -COOR5, -W-OH o -W-NR5R6; R2 representa un átomo de H o un grupo seleccionado entre los grupos (i) alquilo(C1-C5), (ii) alcoxi(C1-C5), (iii) -COOR5, (iv) -NR5R6, (v) -C(O)-NR5R6, (vi) -SO2-NR3R4, (vii) heteroarilo eventualmente sustituidos con un grupo alquilo(C1-C5), (viii)-W-arilo, (ix) -W-heteroarilo, (x) -O-W-arilo, (xi) -O-W-heteroarilo y (xii) -O-W-NR5R6 ; entendiéndose que R3 y R4, (i) que pueden ser idénticos o diferentes, representan, independientemente uno de otro, un átomo H, un grupo alquilo(C1-C5), cicloalquilo(C3-C6), arilo, heteroarilo, -CH2-heteroarilo, alquil(C1-C5)-NR5R6, -W-OH o -W-NR5R6 ; o (ii) forman junto con el átomo de nitrógeno que los porta un grupo heterocicloalquilo eventualmente sustituido con uno o varios grupos seleccionados entre los grupos alquilo(C1-C5) y -CH2-arilo ; W es un grupo alquileno-(C1-C5), eventualmente sustituido con uno o varios grupos hidroxi; R5 y R6, que pueden ser idénticos o diferentes, representan, independientemente uno de otro, un átomo de hidrógeno o un grupo seleccionado entre los grupos alquilo(C1-C5) y los grupos cicloalquilo(C3-C6), así como su procedimiento de preparación y sus aplicaciones en terapéutica.
Patent GB-189703641-A (GB)
Title: Improved Appliance to Prevent Spilling in Vessels Containing Liquids.
Inventor: ALLAN THOMAS WILLIAM
Filed: 1897-02-11
Granted: 1897-03-27
Abstract: 3641. Allan, T. W., and Adamson, A. G. Feb. 11. Gas exits.-Relates to a gas exit which prevents the liquid from splashing, running, or oozing out. It consists of a tube A, Figs. 1 and 2, which fits in an orifice in the cover of the vessel and the upper part of which is covered by a light ball c. Around the tube A is another tube B the upper end of which is closed except for a small perforation b. On the tube B is fixed a piece of rubber tubing D the sides of which are flattened together as shown in Fig. 1.
Patent GB-189716370-A (GB)
Title: Improvements in Gas or Vapor Cocks.
Inventor: CONIHE ORLANDO FERDINAND
Filed: 1897-07-10
Granted: 1897-08-21
Abstract: 16,370. Conihe, O. F. July 10. Locking gas valves and cocks.- The valve 18 is governed by the key 26 having a stem 27 provided with two projections 34, 35; a spring 36 presses on the latter and causes the former to pass through the slot 29 in the washer 28, when the gas is turned off. In this case the projection 34 is out of engagement with the groove 21 in the plug 18, and rests in the hollow 17. To turn the plug it is now necessary to press the key upwards and cause the projection 34 to pass through the opening 29 into engagement with the plug. The rotation of the plug is limited by the pin 31<1> which engages with the slot 22 in the plug, this pin also serving to prevent the washer 28 from turning. The spring 38 presses against the washer 13 and the packing. The casing consists of three parts, a base cap, a body portion 2 with the inlet and outlet ports, and a dome-shaped cap 3.