baber/WOPTO huggingface dataset:
Patent EP-0674502-A1 (EP)
Title: Flexible spacers for use in disposable absorbent articles.
Inventor: FREELAND MARY ELAINE
IPC: A61F13/15
Filed: 1993-12-09
Abstract: A spacer for use in a disposable absorbent article is disclosed. The spacer has an outer cover and a plurality of discrete elements enclosed by the outer cover. The discrete elements can move relative to one another within the outer cover. Relative movement of the discrete elements permits the spacer to plastically deform in response to flexural loading, while maintaining a fecal void space in the absorbent article under compressive loading.
Patent EP-0690746-A1 (EP)
Inventor: BERGMAN CARL
IPC: B21J9/12
Filed: 1994-03-16
Abstract: PCT No. PCT/SE94/00227 Sec. 371 Date Sep. 19, 1995 Sec. 102(e) Date Sep. 19, 1995 PCT Filed Mar. 16, 1994 PCT Pub. No. WO94/21370 PCT Pub. Date Sep. 29, 1994A high-pressure press is provided with a high-pressure chamber and an end member located at one end of the high-pressure chamber which serves as a packing holder. The end member is provided with a support surface which, under maximum pressure condition in the high-pressure chamber, faces an opposite end surface on the low-pressure cylinder which serves as a stationary part of the press. In this way, forces acting in a direction from the high-pressure chamber are transmitted to the stationary part when the support surface on the end member is brought into contact with the supporting end surface on the low-pressure cylinder.
Patent EP-0690998-A1 (EP)
Inventor: KIEHNE DOUGLAS A
IPC: G03B21/64
Filed: 1994-02-22
Abstract: L'invention concerne une enveloppe perfectionnée pour transparents utilisés avec des rétroprojecteurs. Ladite enveloppe est constituée d'une pochette rectangulaire en matériau en feuille transparent dont les deux bords latéraux longitudinaux sont liés par des bords plus courts, au moins un bord latéral étant ouvert de manière à permettre l'insertion d'un transparent. Par ailleurs, au moins un volet opaque est fixé de manière pliable le long d'un des bords latéraux au moyen d'une bande adhésive flexible, la bande se composant d'un support en polyester flexible de 5 à 15 micromètres d'épaisseur recouvert d'un côté d'une couche d'adhésif et présentant une mesure de flexibilité d'environ 1,8 grammes. Le volet peut rester en position non pliée sur la plaque d'un rétroprojecteur avec un transfert d'adhésif minimum à la température de fonctionnement du rétroprojecteur.
Patent EP-0693226-A1 (EP)
Title: Electrolyte solide et piles
Inventor: PELED EMANUEL
IPC: H01M10/052
Filed: 1994-04-07
Abstract: L'invention concerne de nouveaux électrolytes solides, composites (CSE) (44) obtenus à partir d'une combinaison qui comprend des particules d'oxyde non conducteur de la taille du micron, un sel métallique alcalin, un élastomère électroniquement isolant et jusqu'à un certain pourcentage d'un solvant exempt de protons. L'invention concerne également des piles primaires et secondaires (15) qui contiennent l'électrolyte composite. L'invention concerne aussi une pile électrochimique ayant un nombre de transfert des ions de métal alcalin inférieur à 0.5.
Patent EP-0696188-A1 (EP)
Title: Antiperspirant stick compositions exhibiting improved wash-off performance
Inventor: SAWIN PHILIP ANDREW
IPC: A61K8/39
Filed: 1994-04-11
Abstract: Antiperspirant stick compositions made from a solidifying agent which may include a gellant such as n-acyl amino acid amides, 12-hydroxystearic acid, esters of 12-hydroxystearic acid, amides of 12-hydroxystearic acid, and mixtures thereof; or a wax; a liquid base material including a non-volatile, non-polar emollient oil; an antiperspirant active; and a wash-off agent made of selected polyoxyethylene ethers; polyoxyethylene esters and diesters; and polyoxyethylene glyceryl esters and diesters. Such antiperspirant stick compositions exhibit improved wash-off performance, particularly with regard to the solidifying agent and the non-polar, non-volatile oils. These compositions are easily prepared by conventional techniques.
Patent EP-0696303-A1 (EP)
Inventor: HUGHES MORGAN M
IPC: C08L23/08
Filed: 1994-04-25
Abstract: Mélanges de polymères d'éthylène sensiblement linéaires, par exemple, des polyéthylènes préparés au moyen de catalyseurs à géométrie commandée, qui sont greffés avec un ou plusieurs composés organiques oléfiniquement insaturés, par exemple, de l'anhydride maléique, et un autre polymère thermoplastique, par exemple, un polyester ou un polyamide. Ces mélanges présentent des caractéristiques excellentes de résilience à température ambiante et à basse température (par exemple -30 °C).
Patent EP-0699157-A1 (EP)
Inventor: GORLICH MICHAEL P
IPC: B65B7/16
Filed: 1994-05-16
Abstract: An apparatus for making a modified atmosphere package includes a plurality of packaging stations. A rotary conveyor is provided for moving trays from one station to the next. The rotary conveyor has a platform which carries a plurality of trays. One of the packaging stations is adapted to load the trays on to the platform. Another station is adapted for loading a food product into the trays. A further station is adapted to unload the trays from the platform. An apparatus is provided for replacing the ambient atmosphere in the trays with an atmosphere reduced in oxygen content before the trays are covered with a film.
Patent EP-0656133-A1 (EP)
Title: Gas pressure controller
Inventor: CHAMBONNET BERNARD
IPC: G05D16/10
Filed: 1994-06-21
Abstract: A controller including a piston (13) with a hollow rod (21) extending through an inner partition wall (6) defining a high pressure chamber (3) and an inner chamber (5) and co-operating with a valve seat (24) arranged inside the high pressure chamber (3) on a sealing member (25) in one end (2) of the controller body. The inner chamber (29) is in communication with a side chamber (9) separated from the outside by a membrane (10). Both chambers (9 and 5) are filled with an incompressible fluid (29), typically a silicone oil, which transmits the pressure of the surrounding medium to the piston (13). The controller may be used in underwater breathing apparatuses, especially for cold water diving.
Patent EP-0710255-A1 (EP)
Inventor: ATWELL RAY W
IPC: C08F2/02
Filed: 1994-07-22
Abstract: Procédé de polymérisation sans solvant de styrènes bromés comprenant le mélange de monomères de styrènes bromés avec un initiateur de polymérisation, l'introduction du mélange monomère/initiateur de polymérisation dans un dispositif de prépolymérisation dans lequel les monomères commencent à se polymériser et l'introduction du mélange monomère/initiateur de polymérisation et du bromostyrène partiellement polymérisé dans une extrudeuse à vis, de façon à conduire le processus de polymérisation vers un degré élevé d'achèvement en une durée limitée. Les monomères peuvent être éventuellement préchauffés avant leur mélange avec l'initiateur ou bien le dispositif de polymérisation peut comporter un dispositif de chauffage.
Patent EP-0663792-A1 (EP)
Title: Substrat de culture hors-sol
Inventor: KAFKA BERNARD
IPC: A01G31/00
Filed: 1994-07-27
Abstract: L'invention est relative aux substrats à base de feutres minéraux, utilisés pour la culture hors-sol. Les substrats selon l'invention sont formés à partir d'un feutre de fibres minérales disposées en strates, lesquelles sont, au moins partiellement, plissées dans le substrat, cette structure résultant d'une ou plusieurs opérations de compression longitudinale du feutre d'origine, ledit feutre à strates partiellement plissées étant disposé dans le substrat de manière que la direction de compression longitudinale reste parallèle au plan horizontal correspondant au sol pendant son utilisation.
Patent EP-0669972-A1 (EP)
Title: Procede de depistage d'agents antiviraux susceptibles d'etre efficaces en therapeutique
Inventor: BONYHADI MARK L
IPC: C12Q1/18
Filed: 1994-08-19
Abstract: Procédé de dépistage d'activités potentiellement antivirales dans des agents par évaluation de leur capacité de suppression de la réplication virale et/ou d'une pathologie virale dans des cellules thymiques obtenues par culture in vitro dans un organe thymique. On a également prévu des procédés d'étude de l'infectivité et des pathologies virales.
Patent EP-0677120-A1 (EP)
Inventor: MARINI INGO
IPC: C08L27/18
Filed: 1994-09-28
Abstract: PCT No. PCT/AT94/00139 Sec. 371 Date Jun. 7, 1995 Sec. 102(e) Date Jun. 7, 1995 PCT Filed Sep. 28, 1994 PCT Pub. No. WO95/12698 PCT Pub. Date May 11, 1995Monoaxially stretched moulded article made of polytetrafluorethylene (PTFE) containing talc and/or mica and/or a high temperature resistant polyimide and/or whiting as filler, and having strength values in the stretching direction of at least 10 cN/tex. The moulded article according to the invention may be formed into dental floss if it contains whiting as filler.
Patent EP-0665409-A1 (EP)
Inventor: RAFELD KARL
IPC: F24D19/08
Filed: 1995-01-19
Abstract: Each down-pipe (4,5) has an air collection chamber (7) near its upper end. This is ventilated directly into the return pipe (6). The chamber is limited by a connection pipe section (8). One end (9) of the section is connected to the heating tube coil (10), and the other end (11) is connected to the return pipe (6) via a ventilation channel (12). The channel is part of a T-shaped ventilation piece (13). The two aligned connection parts (14,15) of the T-shape are built into the return pipe. The vertical part (16) contains the connection pipe section. The channel also has a small bore, which passes through the wall into the connection pipe section.
Patent EP-0727252-A1 (EP)
Inventor: NAZIMEK DOBIESLAW
IPC: B01D53/62
Filed: 1995-02-20
Abstract: An agent for neutralization of toxic gases being produced during combustion of organic fuels, contains 3 to 10% of alkali metal carbonate, 7 to 15% of zinc oxide and 75 to 90% of MgO by weight. Aluminium oxide or/and calcium carbonate or/and urea are used as preferable additions. The agent can be added either to fuel or straight into a furnace. 
The agent in an alternative solution is in a form of suspension in a liquid, preferably a combustible liquid. 
The agent, apart from decreasing of emission of acid gas contaminations and CO, increases fuel combustion temperature and self-clearing of the furnace and outlet system. It is especially suitable for use in power generating stations.
Patent EP-0678255-A1 (EP)
Inventor: RIOJA CALVO MIGUEL ANGEL D
IPC: A47B88/00
Filed: 1995-03-24
Abstract: The runner-rails (2,3) are joined to the drawer front (4). The drawer has a removable, single-piece shell (1) which has a collar (1a) on its long sides, extended by a protruding skirt (1b) containing assembly ducts. Each guide (2,3) has a front (6) and back (7) fixture fitting into the ducts with a seating for the top of the ducts. The back of the drawer front has a coupling (8). The front holders have a vertical cavity (10) opening forwards into the connecting plane with the drawer front. The two side surfaces of the cavity have guide rails matching guide grooves in the back couplings. <IMAGE>
Patent EP-0694587-A1 (EP)
Inventor: KUEHLWEIN JUERGEN DR
IPC: C09B67/22
Filed: 1995-05-23
Abstract: The new monoazo-indole dyes (claimed) of formula (I) are obtd. by diazotising an aromatic amine and coupling with an appropriate indole. X = (i) 1-4C alkylsulphonyl, mono- or di-1-4C alkylaminosulphonyl, 1-4C alkoxycarbonyl or mono- or di-1-4C alkylaminocarbonyl (each opt. substd. by OH, CR, Br, CN, Ph, PhO, 1-4C alkoxy, or 1-4C alkylcarbonyloxy this latter substit. itself opt. substd. by OH, 1-4C alkoxy, PhO, Ph, Cl, Br or CN); (ii) phenylsulphonyl, phenylaminosulphonyl, phenylcarbonyl or phenylaminocarbonyl (each opt. substd. once or twice by Me, Et, MeO, EtO, MeO.CO, EtO.CO, F, Cl or Br; (iii) 1-4C alkylcarbonyl opt. substd. by OH, Cl, Br, CN, 1-4C alkoxy, PhO or Ph; (iv) phenoxycarbonyl opt. substd. once or twice by Me, MeO or Cl; or (v) aminosulphonyl, aminocarbonyl, CF3, F, Cl, Br, CN or H; X<1> and X<2> = Cl or Br; R = (i) H or allyl; or (ii) 1-6C alkyl opt. substd. by CN, OH, Cl, Br, 1-4C alkoxy, 1-6C alkoxyalkoxy, hydroxyethoxy, hydroxyethoxyethoxy, PhO or Ph; or (ii i) 1,4-alkylcarbonyloxy or 1-4C alkoxycarbonyl each opt. substd. by OH, 1-4C alkoxy, Ph, PhO, Cl, Br or CN; R<1> = (i) H or 1-4C alkyl; or (ii) Ph opt. substd. once or twice by Me, MeO or Cl; and Y = NO2, F, Cl or Br.
Patent EP-0691382-A1 (EP)
Inventor: BECKMANN STEFAN DR
IPC: C09B23/06
Filed: 1995-06-27
Abstract: 2-Aminothiazol-5-yl-methine dyes of formula (I) are new: T-CH=CH-CH=Q (I); T = a 2-amino-thiazole gp. of formula (II); R<1>,R<2> = H, opt. substd. 1-8C alkyl, opt. with 1 or 2 ether O atoms in the chain; 3-4C alkenyl; 5-7C cycloalkyl; phenyl; or tolyl; or NR<1>R<2> = 5-6-membered satd. heterocyclyl, opt. contg. other hetero-atom(s); R<3> = H; halogen; 1-8C alkyl; opt. substd. phenyl or benzyl; cyclohexyl; thienyl; OH; or 1-8C monoalkylamino; Q = the radical of a CH-acid cpd.
Patent EP-0734807-A1 (EP)
Inventor: SAPPOK MANFRED DR
IPC: B23K37/02
Filed: 1995-08-01
Abstract: The process concerns removal of casting defects, according to which the region (12) with a defect is hollowed out and is filled with a weld material. The region is preheated to 400-700 degrees C. Welding takes the form of arc-welding with a cast iron electrode. The casting (11) is placed under a crane with a vertically movable lifting table. An electrically driven electrode feeder (6) is used. The electrode is positioned by means of the crane. After the arc is ignited, the electrode is automatically advanced by the electrode feeder. An operator uses a guide bar (13) to impart a pendulum motion to the electrode. Also claimed is an appts. for carrying out the above process.
Patent EP-0701791-A1 (EP)
Inventor: BALLENDAT MARTIN
IPC: A47C3/025
Filed: 1995-08-31
Abstract: The chair has two spaced parallel flanges (30,30') protruding down from underneath the seat (22). The seat is fixed on a support frame (10) so that it can be inclined to several sides. Two spaced parallel flanges (20,20') project up from the support frame. The seat flanges and support frame flanges are parallel and spaced from each other. Elastic buffer elements (32) which allow the incline adjustment are mounted with their axes at least approximately horizontal between a seat flange and support flange. The flanges can be arranged in the longitudinal direction of the seat and the buffer elements across same.
Patent EP-0705636-A1 (EP)
Inventor: BAKSH MOHAMED SAFDAR ALLIE
IPC: B01D53/053
Filed: 1995-10-06
Abstract: An improved PSA process for separating at least one non-preferentially-adsorbable first gas, such as oxygen and argon, from a gas mixture, such as air, containing said first gas and one or more selectively-absorbable second gases. It involves novel steps of simultaneous equalization and evacuation followed by simultaneous feed and product gas repressurization of PSA beds. This results in an overall faster and more efficient cycle with 100% utilization of a pressure-reducing means, such as a vacuum blower, and a reduction in power use of about 15%. The invention involves overlapping of various steps of the PSA cycle to reduce total cycle time and thus improve productivity.
Patent EP-0771017-A1 (EP)
Inventor: MABUCHI HIROSHI
IPC: H01J37/32
Filed: 1995-10-27
Abstract: A plasma processing apparatus comprises means of supplying the microwave, a reaction chamber having a microwave lead-in opening, a microwave window for introducing the microwave provided by the microwave supply means into the reaction chamber through the microwave lead-in opening, and a supporting member having beams for supporting the microwave window. The apparatus has its microwave window divided in correspondence to areas of the supporting member divided by the beams. The apparatus can have a larger microwave window which is reinforced by the beams against the pressure at plasma generation, and is capable of processing large semiconductor substrates and glass substrates for liquid crystal display panels stably and uniformly.
Patent EP-0719763-A1 (EP)
Inventor: MUELLER ULRICH DR
IPC: A61K31/535
Filed: 1995-11-27
Abstract: 4-(Quinolin-2-yl-methoxy)phenyl acetic cid derivs. of. formula (I) and their salts are new. A, D = H, 3-8C cycloalkyl, N3, OH, halo, 1-6C alkyl, 1-6C alkoxy, 2-6C alkenyl or 5-6-membered heterocycle (opt. unsatd.) contg. 1-3 Het; Het = N, S and/or O. R1 = H, OH or 1-4C alkyl; R2 = H, OH, halo, 2-8C alkenyl, 1-8C alkoxy, 3-14C cycloalkyl, 1-8C alkyl (opt. substd.), or indenyl; or R1+R2 = 5-7C satd. carbocycle or a gp. of formula (a); a = 2-6; E = NH-CHL-R7, NR3-CHL-CH2OH, NR4-CHLCH2OR5 NH-CHL-(CH2)bT, NH-CHV-R6, NH-CHR8-CH2OH, NH-CHV-CONR9R10, NR4-W-OH, -X-CHL-Y, NHR11 or a gp. of formula (b); R3 = phenyl, Me or amino-protecting gp.; R4 = H or as R3; R5 = 1-4C acyl or 1-4C alkyl; L = phenyl, benzyl or naphthyl (all opt. substd.); b = 0-2; R12 = 1-4C alkyl or phenyl; T = 5-7 membered, opt. benzo-fused, opt. (partly or fully) unsatd. heterocycle with 1-3 Het, (both rings opt. substd.); V = as L or T, or a gp. of formula (c); d = 1-3; R6 = R13 or CH2R13; R13 = OH, COOH or up to 4C alkoxycarbonyl; R7 = H, CN CF3, 2-7C alkenyl, 1-7C alkyl (both opt. substd.), 1-6C alkoxy or CONH(CH2)fNR14R15; f = 1-3; R21,R22,R14,R15 = H, phenyl, or 1-4C alkyl; R8 = H, COOH, up to 4C alkoxycarbonyl, or 1-5C alkyl (opt. substd.); R9,R10 = H, 3-6C cycloalkyl, phenyl, 1-6C alkyl (opt. substd.); or NR9R10 = a gp. of formula (d); Z = O, CH (sic) or NR18; R18 = H, acetyl, protective gp. or SO2R19; R19 = 1-4C alkyl, benzyl or phenyl (opt. substd. by phenyl or tolyl); W = 2-7C alkyl (opt. substd.), OR20 or NR21R22; R20 = 1-6C alkyl; X = O or S; Y = CHO or CHR23R24; R23 = H and R24 = OH, 1-4C alkoxy, or 1-4C acyl; or R23,R24 = 1-4C alkoxy; R11 = 1-6C alkyl (opt. substd.), phenyl (opt. substd.) etc.; with exclusions.
Patent EP-0717354-A1 (EP)
Inventor: GUZAK CHRISTOPHER J
IPC: G06F13/00
Filed: 1995-12-12
Abstract: A computer system provides expanded clipboard formats that embellish the number of formats that may be used with a clipboard. These expanded clipboard formats enable users in applications to broaden their use of the clipboard and other data transfer mechanisms. The clipboard formats may be utilized by a conventional clipboard, by drag-and-drop mechanisms and by OLE data transfer mechanisms. Certain of the expanded clipboard formats are adapted for use in the data transfer of non-file system objects.
Patent EP-0673970-A1 (EP)
Inventor: MARIS CATHERINA AUGUSTA LOUIS
IPC: C08L53/02
Filed: 1995-03-20
Abstract: Conveyor belt, obtainable by application of a block copolymer composition, comprising at least:
     (a) an optionally modified block copolymer, containing at least two terminal poly(vinylaromatic) blocks and at least one internal poly(conjugated diene) block,   (b) a non-aromatic plasticizing oil, and   (c) a terminal block compatible resin; 
on at least one side of a fabric having from 5 to 25 threads per cm and process for the manufacture of it, while the threads in said fabric have a thickness in the range of from 2 µ to 300 µ, process for the preparation and block copolymer composition suitable for the manufacture of conveyor belts.
Patent EP-0765985-A1 (EP)
Inventor: DRAXLER OLIVER
IPC: E05D1/02
Filed: 1995-09-29
Abstract: The invention relates to a constructional element comprising a central hinging member (60,67,68,73-75) and a first and second connection plate (61,62,65,66,71,72), wherein the central member comprises at least a first arm (60,67) which is on each side hingingly connected to the connection plates, at least one of the connection plates comprising connection means (25,25') for attaching the at least one connection plate to a rigid body. A preferred embodiment of a constructional element comprises a central hollow member (2) and a first and second connection plate, wherein the central member comprises four arms (5-8), each arm having a base end (9,10) and a free end (15,16),
     a first and a second arm (5,6) being with their base ends (9) connected to the first connection plate (3) in a first lateral hinge point (21),   a third and a fourth arm (7,8) being connected with their base ends (10) to the second connection plate in a second lateral hinge point (22),   the free ends (15) of the first and third arm (5,7) being mutually connected in a first free hinge point (23),   the free ends (16) of the second and fourth arm (6,8) being mutually connected in a second free hinge point (24), wherein at least one of the connection plates (3,4) comprises connection means (25,25',26,26';27,27') for attaching to a rigid body.   
     The constructional element can be used as a door- or window frame and can connect window panes to a building at different orientations and can be adapted to different geometries. The constructional element can also be used to form constructions such as platforms, pyramids or geodesic domes.
Patent EP-0700965-A1 (EP)
Inventor: ROZKUSZKA KENNETH PAUL
IPC: C08K5/37
Filed: 1995-08-17
Abstract: Poly(vinyl chloride), when impact modified with a core/shell impact modifier whose shell is predominantly formed from a C₁ to C₄ alkyl methacrylate and whose core is a copolymer of butyl acrylate and a specific compositional range of certain higher alkyl acrylate monomers, exhibits improved toughness, especially at lower use levels of the modifier or lower test temperatures for the blend, than when the core of the impact modifier is either substantially formed from butyl acrylate alone or substantially formed from the higher alkyl acrylate alone.
Patent EP-0707186-A1 (EP)
Inventor: SPENCER ROBERT M
IPC: F26B5/00
Filed: 1995-10-10
Abstract: The method is advantageously  applied in plasma sterilization processes  in particular. Articles to be sterilized are  placed in a sealed chamber (11) and the  chamber is evacuated. A plasma of residual gas  species is generated in the chamber  during an initial evacuation step (44). This promotes  drying of the articles and advantageously  allows a desired pressure to be attained more  quickly than without the plasma. Sterilizing gas  is injected into the chamber (11), and a  second plasma is generated to activate the  sterilizing gas plasma, thereby sterilizing  the articles in the chamber.
Patent EP-0718291-A1 (EP)
Inventor: OHI HIDEO
IPC: C07D249/12
Filed: 1995-12-18
Abstract: The use of, as a reaction solvent in the reaction of a 1,3,5-trialkyl-2-halogenobenzene and an alkali metal salt of 3-mercapto-1H-1,2,4-triazole in the presence of a copper catalyst for the preparation of a 3-(2,4,6-trialkylphenylthio)-1H-1,2,4-triazole useful as an intermediate in the preparation of herbicide compounds, a compound represented by the general formula
       
 in which R is a lower alkyl group, Y is a methylene group or an N-(lower alkyl)imino group and Z is a divalent hydrocarbon group to form a 5-membered ring or 6-membered ring together with the group -N-CO-Y-, such as N-methyl-2-pyrrolidone, N,N'-dimethyl-2-imidazolidinone and N,N'-dimethyl propylene urea, gives the product in high yield without the danger of explosion.
Patent EP-0697293-A1 (EP)
Inventor: HABAR GERARD
IPC: B41M5/165
Filed: 1995-07-24
Abstract: Microcapsule useful for pressure sensitive copying paper contains an organic soln. of a hydrophobic chromogen. The microcapsule is characterised in that the solvent is a mixt. obtd. by transesterification of a vegetable oil. Also claimed is the pressure sensitive paper coated on one side with the microcapsule.
Patent EP-0707894-A1 (EP)
Inventor: BEHAR ALAIN
IPC: B05B11/00
Filed: 1995-10-13
Abstract: The pump consists of a cylindrical body (1) with a lower intake (2) and inlet valve (12), a collar (6) to retain a spring (5) and a piston (2) with a nozzle (3) which has its outlet channel controlled by a valve (4). The nozzle has an inner shoulder (33) at its upper end, and a lower end which broadens beneath the collar, forming a cap (30) which engages with the upper end of the piston (2) to form an inner chamber (26) containing the outlet valve(4). The lower part (22) of the piston has an axial channel (23) which acts a seat for the outlet valve. The outlet valve (4) and its spring (41) are fitted into the nozzle from its lower end before the piston is fitted.