baber/WOPTO huggingface dataset:
Patent BR-0316581-B1 (BR)
Inventor: ZEVALLOS MANUEL LEGENDRE
IPC: C09K8/38
Filed: 2003-12-04
Abstract: Self-generating foamed fluids for circulation through a well during drilling operations and methods for circulating such self-generating foamed drilling fluids are provided for. The drilling fluid comprises an aqueous solvent, a polymer, a surfactant, a first foam generating agent, and a second foam generating agent. The first and second foam generating agents react to generate a gas within the drilling fluid and thereby to foam the drilling fluid. Preferably, the foam generating agents are selected such that they react to generate carbon dioxide. Preferably a base fluid comprising excess amounts of only one of the foam generating agents is pumped into the drill string using a hydraulic pump. The other foam generating agent then is injected in a controlled manner downstream of the circulation pump such that the drilling fluid is foamed after being pumped for circulation through the well. The novel drilling fluids preferably have a density of from about 5.8 lb/gal to about 0.83 lb/gal, and most preferably, from about 3.3 lb/gal to about 0.83 lb/gal.
Patent BR-PI9812104-B1 (BR)
Inventor: NG ART
IPC: H04N7/16
Filed: 1998-07-21
Abstract: A method and apparatus for presenting targeted advertisement to a user in an electronic program guide (EPG), comprising: displaying a plurality of television schedule information; simultaneously displaying the targeted advertisement with the displayed plurality of television schedule information, wherein the advertisement is targeted to the user responsive to the user's interests.
Patent WO-03034642-B1 (WO)
Title: Acces systeme et procedes de synchronisation pour systemes de communication mimo ofdm, paquet de couche physique et configuration de type preambule
Inventor: MA JIANGLEI
IPC: H04L5/02
Filed: 2002-10-15
Abstract: L'invention concerne un procédé et un appareil permettant d'effectuer une acquisition, une synchronisation et une sélection de cellule à l'intérieur d'un système de communication MIMO-OFDM. On effectue une synchronisation grossière pour déterminer une fenêtre de recherche. On effectue ensuite une synchronisation fine en mesurant les corrélations entre des sous-ensembles d'échantillons de signaux, dont le premier échantillon de signal se trouve à l'intérieur de la fenêtre de recherche, et des valeurs connues. Les corrélations sont effectuées dans le domaine fréquentiel du signal reçu. Dans un système OFDM à sorties multiples, chaque antenne de l'émetteur OFDM possède une valeur connue unique. Cette valeur connue est transmise sous forme de paires de symboles pilotes consécutifs, chaque paire de symboles pilotes étant transmise avec le même sous-ensemble de fréquences sous-porteuses à l'intérieur de la trame OFDM.
Patent CH-707719-B1 (CH)
Title: Bausatz zur Ausbildung einer Vorrichtung mit einer UV-Quelle für die UVC-Entkeimung.
Inventor: MARTIN GRAUPNER
IPC: C02F1/32
Filed: 2014-02-21
Abstract: Die Erfindung bezieht sich auf einen Bausatz zur Ausbildung einer Vorrichtung (1) mit einer Strahlungsquelle für die UVC-Entkeimung nach mindestens einer der Klassen im Bereich von IP52 bis IP68 nach EN 60 529, umfassend mindestens einen Röhrenkörper (2), der eine emittierende UV-Quelle mit elektrischen Anschlüssen (3) umfasst, mindestens einen Fassungsträger (4) zur Aufnahme der elektrischen Anschlüsse (3) des Röhrenkörpers (2) und einen elektrischen Steckverbinder (7) zur Übertragung von elektrischer Energie über den Fassungsträger (4) zum Röhrenkörper (2), ein Element zur Fixierung des Fassungsträgers (4) an den Röhrenkörper (2), mindestens ein Dichtungselement (10) zur Bereitstellung der gewünschten Dichtigkeit der elektrischen Steckverbindung und ein Reflektorelement (15) zur Aufnahme des Röhrenkörpers (2) und zur Anordnung an den Fassungsträger (4).
Patent CH-698747-B1 (CH)
Title: Movement i.e. timepiece movement, for e.g. automatic electronic watch, has bimetal blade including outer end portion extending from median portion to outside and arranged freely along radial direction with contact of connection unit
Inventor: KOUCH KEVIN
IPC: G04B47/06
Filed: 2005-03-29
Abstract: The movement has a connection unit i.e. screw (36), connecting a hairspring shaped bimetal blade (25) to a frame i.e. plate (20). A mobile device (23) comprises a shaft (15) pivotally mounted on the frame and is arranged to carry temperature display units. The blade has a median portion arranged between inner and outer end portions (28, 32). The inner end portion is secured to the mobile device. The outer end portion extends from the median portion to the outside and is arranged freely in translation along a radial direction with contact of the connection unit. An independent claim is also included for a watchmaking piece comprising a case in which a timepiece movement is arranged.
Patent CH-700844-B1 (CH)
Inventor: STEINER PETER
IPC: E04G21/32
Filed: 2009-04-23
Abstract: Die Erfindung betrifft einen Pfosten (1) für ein Sicherheitsgeländer. Der Pfosten weist einen Fussteil (2) und eine mit Mitteln (13, 14, 15) zum Fixieren von Geländerelementen versehenen Tragstange (3) auf. Die Tragstange (3) ist schräg an dem Fussteil (2) befestigt. Auf der Unterseite des Fussteils (2) ist ein Bolzen (4) angeordnet, mittels welchem der Pfosten (1) an unterschiedlichen Schalungen und in unterschiedlichen Öffnungen fixierbar ist. Der Bolzen (4) weist einen konisch zulaufenden Vorderteil (5) auf, der mit zumindest einer Bohrung (7) zur Aufnahme eines Sicherungselements (10) versehen ist. Das Sicherungselement (10) ist mittels einer Kette (11) an der Verstärkungsstrebe (12) verbunden.
Patent CH-709099-B1 (CH)
Title: Wagenkasten, Zugkomposition mit Wagenkasten und Verfahren zur Herstellung eines Wagenkastens.
Inventor: FORRER DANIEL
IPC: H02G3/00
Filed: 2014-06-10
Abstract: Ein Wagenkasten (1) eines Doppelstockzuges umfasst zumindest einen Oberstock (2) und einen Unterstock (3), wobei der Unterstock (3) einen Wagenboden (4) umfasst. Zumindest ein Leitungsstrang (5) ist unterhalb des Wagenbodens (4) angeordnet, wobei der Leitungsstrang 5 als vormontierte Montageeinheit montierbar ist. Durch die Verwendung einer vormontierten Montageeinheit unterhalb des Wagenbodens kann der Wagenkasten kostengünstig hergestellt werden und trotzdem möglichst viele Passagiere aufnehmen.
Patent CH-709760-B1 (CH)
Title: Strömungsturbine und Verfahren zu deren Betrieb.
Inventor: ROMAN BÜHLER
IPC: F03B17/06
Filed: 2014-06-13
Abstract: Die erfindungsgemässe Strömungsturbine dient zur Erzeugung von Energie aus der Fliesskraft eines flüssigen Mediums, insbesondere aus einem Fliessgewässer oder einem Kanal. Sie weist eine Mehrzahl von mit Abstand um eine gemeinsame Drehachse (6) entlang einer Umlaufbahn positionierten Flügelprofilen (1, 2, 3, 4, 5) mit dem Querschnitt einer Tragfläche auf. Diese sind zum Verstellen eines jeweiligen Anstellwinkels (10, 11) je um eine eigene Schwenkachse (12, 13, 14, 15, 16) bewegbar. Das Verstellen erfolgt kontinuierlich mittels je eines Gestänges (17, 18, 19, 20, 21), das das jeweilige Flügelprofil (1, 2, 3, 4, 5) mit einen Exzenter (22) an der Drehachse (6) der Strömungsturbine verbindet. Diese Strömungsturbine zeichnet sich durch eine hohe Effizienz aus, insbesondere auch bei schwachen Wasserströmungen. Die kompakte, niedrige Bauweise und die Durchlässigkeit für Fische wirken sich zudem positiv auf die Bewilligung von Baugesuchen aus.
Patent CS-259084-B1 (CS)
Inventor: SCHOVANEC JIRI
IPC: B65H49/00
Filed: 1986-12-30
Abstract: Zařízení pro upínání snovacích válů,
zejména u šlichtovacích strojů, sestávající
z pevného a posuvného upínače snovaního
válu. Posuvný upínač je přitom tvořen
upínacím kotoučem otočné uloženým na
jednom konci čepu, jenž je suvně a neotočně
uchycen v nosném tělese, které Je
upevněno ke stojanu odvíječe stroje. Cep je
současně ve svém axiálním směru opřen o tlačnou
pružinu, jejíž druhý konec Je opřen o
smykadlo suvně uložené gednak v nosném
tělese a jednak na druhem konci čepu.
K čepu je upevněn přestavitelný doraz,
o nějž je opřeno smykadlo opatřené úchytem,
kterým je ke smykadlu uchycen pákový
mechanismus. Pákový mechanismus je tvořen
ramenem uchyceným kloubem k nosnému
tělesu a dalším kloubem k dalšímu ramenu.
Další rameno je spojeno otočně s úchytem
a opatřeno fixačním kolíkem oproti odpružené
západce otočně uložená na západkovém
čepu, jenž je upevněn k nosnému tělesu.
Zařízení slouží k rychlému a snadnému upnutí
snovacích válů na stojan odvíječe,
přičemž se snadno seřídí u všech těchto
válů shodná upínací síla, která se též
snadno zajistí i při provozu zařízení.
Patent CY-2240-B1 (CY)
Title: Two-and three-component fungicidal mixtures
Inventor: NUNINGER COSIMA
IPC: A61K31/40
Filed: 2001-09-14
Abstract: When used in admixture with mancozeb, chlorothalonil, a copper salt, folpet, fluazinam or cymoxanil (it being possible for the latter to be used also together with one of the other five components), metalaxyl having a high R-enantiomer content of more than 70% by weight, or pure R-metalaxyl, exhibits a markedly increased fungicidal action against plant diseases as compared with a similar mixture in which metalaxyl is used in the form of the racemate.
Patent WO-0202642-B1 (WO)
Title: Composition pour des produits pharmaceutiques et cosmetiques
Inventor: KOBILKE HARTMUT
IPC: C07K16/12
Filed: 2001-07-05
Abstract: L'invention concerne une composition pour des produits pharmaceutiques et cosmétiques, ainsi que son utilisation pour le traitement de blessures, notamment d'inflammations chroniques aiguës et persistantes, par administration de la composition selon l'invention qui contient de l'immunoglobuline. La composition selon l'invention contient, comme constituants actifs principaux, des anticorps IgY de jaune d'oeuf (monovalents ou polyvalents) de poules exemptes d'organismes pathogènes spécifiques et des extraits de microalgues, de préférence de spirulines et de chlorelles, avec ou bien sans oxytétracycline. La composition selon l'invention est utilisée chez l'homme et les animaux sous forme liquide, pâteuse ou solide, notamment en tant que pommade, huile, emplâtre liquide et aérosol, ou bien sous forme de comprimé ou de poudre.
Patent ES-2048633-B1 (ES)
Title: Mecanismo volteador de contenedores ligeros.
Inventor: MUR GIMENO EMILIO
IPC: B65G47/248
Filed: 1991-10-29
Granted: 1996-12-01
Abstract: MECANISMO VOLTEADOR DE CONTENEDORES LIGEROS. EL INVENTO TIENE POR OBJETO UN MECANISMO DESTINADO A VOLTEAR UN CONTENEDOR LIGERO QUE SALE INVERTIDO DE LA MAQUINA EN QUE SE ARMA. ESTE MECANISMO, ESTA CONSTITUIDO POR UN BRAZO BASCULANTE QUE SE DESPLAZA, FORMANDO UN AMPLIO SECTOR DE CIRCULO, Y COMPORTA EN SU EXTREMO SUPERIOR, POR LO MENOS, UNA VENTOSA QUE SE APLICA Y ADHIERE SOBRE EL PLANO EXTERIOR DEL FONDO DE LOS CONTENEDORES YA ARMADOS A SU SALIDA DE LA MAQUINA QUE LOS ARMA. ESTE BRAZO EN SU MOVIMIENTO DE RETROCESO, VOLTEA EL CONTENEDOR Y LO DEPOSITA EN UNA RAMPA POR LA QUE ES GUIADO HASTA EL DISPOSITIVO O LUGAR ELEGIDO. LA FIGURA 3, DEBE CONSIDERARSE COMO PREFERENTE.
Patent ES-2051623-B1 (ES)
Title: Bastidor de ciclo.
IPC: B62K19/22
Filed: 1992-02-06
Granted: 1998-01-01
Abstract: BASTIDOR DE CICLO EL BASTIDOR O CHASIS DE CICLO QUE SE CARACTERIZA PORQUE POR UNA PARTE, A LA LA ESTRUCTURA ALTA (2) ESTA LIGADA, ESTRUCTURA BAJA POR UNA PARTE FRONTAL (15) Y, POR OTRA PARTE, A LOS TIRANTES POR UNA PARTE (14) DE UNION PERFILADA CONTINUA, EL ALOJAMIENTO (4) DE PIVOTE DE HORQUILLA DELANTERA ESTA FORMADO POR UNA CAJA (16) LLAMADA DE DIRECCION, ADAPTADA POR UN ENCAJE (17) SOBRE LA PARTE FRONTAL, Y EL ALOJAMIENTO DE TUBO DE SILLIN ESTA DELIMITADO POR UNA CAJA (30), LLAMADA DE SILLIN, ADAPTADA, POR UNA HORQUILLA (31) SOBRE LA PARTE DE UNION PERFILADA CONTINUA.
Patent ES-2078190-B1 (ES)
Inventor: VALLET MAS JOSE ALBERTO
IPC: C12N1/00
Filed: 1994-05-20
Granted: 1996-08-01
Abstract: The process comprises: (1) preparing a fine dispersion of droplets or particles which contain or are formed of a chemical or biologically active substance in a phase comprised of a solvent and a non solvent of the polymer forming the coating and optionally a surfactant or suspensor agent; (2) preparing a phase which contains the coat-forming polymer dissolved in a miscible solvent in any proportion with the prior dispersion; (3) mixing both phases continuously while maintaining constant the relationship between the phases and the mixture volume and simultaneously spraying the resultant mixture in an evaporation system with temperature and vacuum conditions which provide for the instantaneous evaporation of the solvent from the polymer, causing the deposition of the polymer around the particles or droplets. Application to pharmacy, medecine, cosmetics, veterinary, chemical industry, agriculture, etc. <IMAGE>
Patent ES-2133225-B1 (ES)
Title: Embrague de friccion de un transmisor de impulsos.
Inventor: SCHULZ-ANDRES HEIKO
IPC: F16D13/70
Filed: 1996-08-27
Granted: 2000-03-01
Abstract: Un embrague de fricción con un transmisor de impulsos está provisto de una masa centrífuga, que se puede fijar a un accionamiento, de una carcasa, que sirve para el alojamiento de un resorte de presión así como de una placa de presión y de una anillo, que, en combinación con un registrador de señales, actúa como transmisor de impulsos y que rodea el eje de rotación de la masa centrífuga y de la carcasa. Este anillo puede ser deformado, debido a su reducido espesor en la dirección radial, por medio de fuerzas radiales pequeñas, de manera, que, desde el punto de vista de su diámetro interior, puede ser adaptado al diámetro exterior del elemento de construcción por ensanchamiento o contracción sobre el elemento de construcción, tal como la masa centrífuga o la carcasa, previsto para su alojamiento, para la obtención de una unión por fricción entre el anillo y el elemento de construcción correspondiente. Figura 1.
Patent ES-2140300-B1 (ES)
Title: Aditivo para la introduccion de uno o mas metales en las aleaciones de aluminio.
Inventor: POSADA FERNANDEZ TOMAS
IPC: C22B1/244
Filed: 1997-05-09
Granted: 2000-10-16
Abstract: Aditivo para la introducción de uno o más metales en las aleaciones de aluminio. Se trata de la realización de unos elementos de adición en forma de briquetas o tabletas constituidas mediante la combinación de un polvo aglomerante que contiene, al menos, aluminio, un polvo de uno o más metales o aleaciones comprendiendo el metal o metales que se desea introducir, y un compuesto orgánico tipo cera, todos ellos en proporciones adecuadas, con lo que se logra aumentar la velocidad de disolución de los metales introducidos, aumentar la recepción del metal adicionado, una mejor agitación del caldo, así como una disminución de la cantidad de impurezas y de la cantidad de metal adicionado que es acumulado en el fondo del horno.
Patent ES-2154531-B1 (ES)
Title: Distractor superelastico para la neoformacion osea en defectos oseos mandibulares.
Inventor: GIL MUR FRANCISCO J
IPC: A61F5/04
Filed: 1997-12-12
Granted: 2001-11-16
Abstract: Distractor superelástico para la neoformación ósea en defectos óseos mandibulares. Distractor superelástico para la neoformación ósea de aplicación interna caracterizado porque incorpora un resorte (1) constituido por una aleación metálica con memoria de forma.
Patent ES-2154188-B1 (ES)
Title: Mejoras en los sistemas de obtencion de pavimentos industriales y similares.
Inventor: MORENO BORRAS ENRIQUE
IPC: E01C7/14
Filed: 1998-11-17
Granted: 2001-10-01
Abstract: Mejoras en los sistemas de obtención de pavimentos industriales y similares. Mediante las mejoras de la invención se consigue un pavimento a base de mortero de cemento, que resulta estable y sin fisuras, previéndose para ello que sobre dicho mortero de cemento (,1) se realicen cortes (2), mediante cuchillas o flejes especiales, cortes (2) que afectan a la totalidad del espesor del mortero (1), de manera que las distancias entre las parejas de cortes (2a-2b-2c) responden a retracciones nulas, repitiéndose dichas distancias en todas las direcciones al objeto de obtener pavimentos estables, fijándose las distancias entre los cortes con relación a las cantidades árido/cemento del mortero, al objeto de obtener una resistencia mecánica adecuada. Los cortes que se obtienen sobre el pavimento evitan la aparición de las convencionales fisuras una vez fraguado el mortero de cemento (1).
Patent FR-2801928-B1 (FR)
Inventor: SUZUKI NAOTO
IPC: F01L9/20
Filed: 2000-12-01
Granted: 2008-02-29
Abstract: A control apparatus for a motor vehicle detects a catalyst temperature during fuel cut. If the catalyst temperature is higher than a predetermined temperature, the control apparatus almost completely opens a throttle valve and increases an amount of intake air to thereby reduce pumping loss. If the catalyst temperature is equal to or lower than the predetermined temperature, the throttle valve is almost completely closed. Thereby it becomes possible to reduce pumping loss of the engine while preventing an excessive decrease in catalyst temperature.
Patent FR-2822810-B1 (FR)
Inventor: NUSBAUM PHILIPPE
IPC: B67D3/00
Filed: 2001-03-28
Granted: 2003-08-22
Abstract: The invention concerns a closure device for a carboy designed for a liquid dispenser of the water fountain type. The device comprises a cap (3) including a transverse wall (5) wherefrom projects an outer skirt (6). The transverse wall has, on its inner surface (29), an annular groove (30) coaxial with the cap, delimited by two ribs (31, 32) projecting from the transverse wall. The groove is designed to receive a cast or moulded joint (34), and to prevent the displacement thereof parallel to the transverse wall. The groove can also include on its inner surface means for catching said joint.
Patent FR-2838859-B1 (FR)
Inventor: PERROT CLEMENCE JULIA GENEVIEV
IPC: G10K11/172
Filed: 2002-04-22
Granted: 2004-07-16
Abstract: The acoustic panel is made with two honeycomb structures (30,50) separated by a septum (40). The septum is scanned by a digital camera and successive images transmitted to a computer, which monitors perforations of the septum, determining the rate of perforations by calculating the ratio of the number of holes to the number of pixels in the image.
Patent FR-2845980-B1 (FR)
Inventor: MARCELLI PIERRE
IPC: B66F9/12
Filed: 2002-10-21
Granted: 2005-09-23
Abstract: The rolling device (10) comprises a horizontal table (21) on which balls (23) are mounted. These are surmounted by a grille (31) with openings (32) opposite the balls. The grill can move relative to the table between a bottom position where is uncovers the top of the balls and a top position where it covers the balls. A handle (41) coupled to the grille enables the horizontal displacement. The grille openings are elliptical slots which combined with the spherical profile of the balls cause a vertical displacement of the grille simultaneously to its horizontal displacement.  Independent claims are included for load handling equipment.
Patent FR-2846817-B1 (FR)
Inventor: HUIGNARD JEAN PIERRE
IPC: G02F2/00
Filed: 2002-11-05
Granted: 2005-01-14
Abstract: The multiple frequency component signal generator has a beam generator (L), an optical modulator (MOD) and a photodetector (PD). There is a generation mechanism (GEN) from a first beam (F0) of a number of bifrequency beams generating beams towards independent channels of a multichannel modulator mechanism. The amplitude and function of each beam is calculated to provide the overall signal response required.
Patent FR-2834910-B1 (FR)
Inventor: HOLZER HELMUT
IPC: A63C10/22
Filed: 2003-01-17
Granted: 2005-02-25
Abstract: A snowboard binding comprises base plate with an extension in the peripheral regions on either side of its longitudinal axis, and a U-shaped support element, each extension retaining a respective leg of the support element, which supports a back support pivotably disposed in the region of the support element base and/or which is a stop restriction for a back support mounted on the extensions of the base plate. A pivot bearing mounts the support element so as to be pivotable in a limited pivot path about a pivot axis extending transversely to the longitudinal axis and parallel to the base plate. The binding comprises an adjusting and locking mechanism for fixing the support element in a desired angular position relative to the base plate, and/or an elastically resilient damping mechanism for rebounding the support element into a pre-defined angular position relative to the base plate.
Patent FR-2869866-B1 (FR)
Inventor: CANARD LOUIS
IPC: B62D25/24
Filed: 2004-05-04
Granted: 2006-07-14
Abstract: The invention relates to a fuel trap (1) for a motor vehicle comprising a movable vane (10) provided with a locking member (20) controllable by a cylinder lock (30), wherein said vane (10) is movably mounted in such a way that it is displaceable between closed and open positions, the locking member (20) is movably mounted in such a way that it is displaceable between locked and unlocked positions and the cylinder lock (30) controls the displacement of the locking member (20) between locked and unlocked positions. Said invention is characterised in that the fuel trap (1) also comprises first elastic return means (50) for driving the locking member (20) to the unlocked position, second elastic return means (60) for driving the movable vane (10) to the open position and sensor means (70) for determining the position of said movable vane (10).
Patent FR-2876460-B1 (FR)
Inventor: CHARTON JULIEN
IPC: G02B26/00
Filed: 2004-10-12
Granted: 2007-05-18
Abstract: An optoelectric device including a deformable membrane with an outer reflecting surface and an inner surface whereon a plurality of permanent magnets are fixed, and having a bottom surface entirely coated with a continuous layer of a flexible material; and a support including a plurality of electromagnets placed opposite the permanent magnets to exert an electromagnetic force thereon, locally displacing a zone corresponding to the deformable membrane.
Patent FR-2881954-B1 (FR)
Inventor: LAZZERI PASCALE
IPC: A61K8/72
Filed: 2005-02-11
Granted: 2007-03-30
Abstract: A hair treatment composition cationic surfactants, starch, non-silicone cationic polymer with cationic charge density of >=5 mEq/g, and nonionic non-polymeric solid compound with melting point and viscosity of >=35[deg]C and >=1 Pas at shear rate of 1 s ->1 and 40[deg]C, respectively. An independent claim is included for process for treating keratin material, which involves applying the composition to the keratin material (hair), and then optionally rinsing.
Patent FR-2883039-B1 (FR)
Inventor: PIARD CHRISTOPHE
IPC: F01N3/021
Filed: 2005-03-14
Granted: 2007-04-20
Abstract: The engine has a regulation unit comprising a valve (60) having two shutters (62, 63) that are displaced by a single actuator (61). The displacement of the shutter (62) obstructs an exhaust duct (21), so as to increase the pressure of a recirculation gas circulating in a low pressure exhaust duct (22). The displacement of the shutter permits regulating the flow of the recirculation gas circulating in the duct (22).
Patent FR-2883934-B1 (FR)
Inventor: RIVAL JEAN LUC
IPC: F04C18/12
Filed: 2005-04-05
Granted: 2010-08-20
Abstract: The device has a motor (1) driving a ROOTS type mechanical dry pump (2) with four-stages (5-8) comprising suction sides (5c-8c) and outlets (5d-8d). Inter-staged pipelines (9-11) connect the outlets (5d-7d) to the sides (6c-8c), respectively. Bypass lines (12, 13) are arranged between the side (5c) and the pipeline (9) and between the pipelines (9, 10), respectively. Bypass lines (14, 15) are arranged between the pipelines (10, 11) and between the pipeline (11) and the outlet (8d), respectively. Valves (16-19) are inserted in the pipeline (9, 11) and in the bypass lines (13, 15). An independent claim is also included for a method for vacuum pumping by a multi-staged mechanical dry pump.