Abstract: The present invention relates to a reaction chamber (12) for an IMR-MS apparatus or a PTR-MS apparatus, comprising an essentially gaslight outer housing (14), comprising at least two ion lenses (16) with essentially constant orifice dimensions and/or at least two ion lenses (17) with different orifice dimensions arranged around the reaction region (20), and at least one at least partly gaslight sealing (19), characterized in that the ion lenses (16,17) are placed inside the essentially gaslight outer housing (14), wherein between at least two adjacent ion lenses (16,17) an at least partly gaslight sealing (19) is mounted, wherein the room between at least other two ion lenses (16, 17) is such to allow a gas flow through said room from the reaction region (20) into the outer space (21). The present invention further relates to a method to operate an apparatus according to the invention.

Abstract: The present invention relates to an apparatus and a method for IMR-MS and/or PTR-MS, comprising a sample gas inlet (202, 206), a first ion source (209), a reaction chamber (203), a mass analyzer (204), wherein the reaction chamber (203) and the mass analyzer (204) are arranged along a central axis (A), characterized by a second ion source (209), wherein the sample gas inlet (202, 206) is arranged to introduce gas essentially along the central axis (A) and is connected to the reaction chamber (203); wherein the first ion source (209) and the second ion source (209) are arranged so as to emit reagent ions essentially perpendicularly to the central axis (A); said apparatus further comprising at least one electrode (302, 303, 304, 305), such that the reagent ions emitted from the first or second ion source (209) can be deflected into the reaction chamber (203) essentially in the downstream direction of the central axis (A).

Abstract: The present invention relates to an apparatus and a method for IMR-MS and/or PTR-MS, comprising a sample gas inlet (202, 206), a first ion source (209), a reaction chamber (203), a mass analyzer (204), wherein the reaction chamber (203) and the mass analyzer (204) are arranged along a central axis (A), characterized by a second ion source (209), wherein the sample gas inlet (202, 206) is arranged to introduce gas essentially along the central axis (A) and is connected to the reaction chamber (203); wherein the first ion source (209) and the second ion source (209) are arranged so as to emit reagent ions essentially perpendicularly to the central axis (A); said apparatus further comprising at least one electrode (302, 303, 304, 305), such that the reagent ions emitted from the first or second ion source (209) can be deflected into the reaction chamber (203) essentially in the downstream direction of the central axis (A).

Abstract: The present invention relates to a reaction chamber (12) for an IMR-MS apparatus or a PTR-MS apparatus, comprising an essentially gaslight outer housing (14), comprising at least two ion lenses (16) with essentially constant orifice dimensions and/or at least two ion lenses (17) with different orifice dimensions arranged around the reaction region (20), and at least one at least partly gaslight sealing (19), characterized in that the ion lenses (16,17) are placed inside the essentially gaslight outer housing (14), wherein between at least two adjacent ion lenses (16,17) an at least partly gaslight sealing (19) is mounted, wherein the room between at least other two ion lenses (16, 17) is such to allow a gas flow through said room from the reaction region (20) into the outer space (21). The present invention further relates to a method to operate an apparatus according to the invention.

Abstract: Ion-molecule-reaction—mass spectrometry (IMR-MS) device, comprising an ion source, an adjacent reaction chamber and a mass spectrometer subsequent to the reaction chamber, wherein the reaction chamber comprises an RF device for creating a temporally changing electromagnetic field and wherein an adjustable reduced electric field strength (E/N) can be applied to the reaction chamber, characterized by an input device for entering a desired reduced electric field strength (E/N) by an operator when operating said IMR-MS device for analyzing a sample, and a controlling device that operates the IMR-MS device by adjusting the settings of the IMR-MS device relating to a defined data set of a pseudo reduced electric field strength (PE/N1,2) for the entered reduced electric field strength (E/N), wherein the pseudo reduced electric field strength (PE/N1,2) has been determined by analyzing a first analyte (A1) in the IMR-MS device, wherein intensity signals (RS1) of at least two product ions of the analyte (A1) are record

Abstract: Ion-molecule-reaction-mass spectrometry (IMR-MS) device, comprising an ion source, an adjacent reaction chamber and a mass spectrometer subsequent to the reaction chamber, wherein the reaction chamber comprises an RF device for creating a temporally changing electromagnetic field and wherein an adjustable reduced electric field strength (E/N) can be applied to the reaction chamber, characterized by an input device for entering a desired reduced electric field strength (E/N) by an operator when operating said IMR-MS device for analysing a sample, and a controlling device that operates the IMR-MS device by adjusting the settings of the IMR-MS device relating to a defined data set of a pseudo reduced electric field strength (PE/N1,2) for the entered reduced electric field strength (E/N), wherein the pseudo reduced electric field strength (PE/N1,2) has been determined by analysing a first analyte (A1) in the IMR-MS device, wherein intensity signals (RS1) of at least two product ions of the analyte (A1) are record

Abstract: The invention provides a method and system for analyzing a gas for the presence of a reactant compound via reaction of primary ions of a specific type. A source gas is introduced to a reaction chamber and ionized in this chamber. The pressure in the reaction chamber is adjusted to avoid the formation of protonated species and other impurities. The primary ions generated in the reaction chamber are transferred to a drift tube. The gas to be analyzed is diluted with a carrier gas and the resulting mixture is introduced into the drift tube. The ionization energy of the carrier gas is equal to or higher than the ionization energy of the primary ions. The product ions resulting in the drift tube from a reaction of the primary ions with the reactant present in the gas to be analyzed are then detected, for example using a mass spectrometer. Preferably, an existing PTR-MS setup is used to perform the method of the present invention.

Abstract: Instrument for analysing compounds, comprising an ion source, an adjacent drift tube and a mass spectrometer including an ion detector for separation and detection of product ions, wherein instrumental parameters of the instrument can be altered by actuating elements for actuating variables of at least one of the group consisting of ion source, adjacent drift tube, mass spectrometer and ion detector, characterized by a controlling unit which is connectable to a storage device, wherein the storage device comprises a specification for certain compounds, the specification for each compound comprising a set of data comprising at least two different instrumental parameters and corresponding intensity signals for product ions detected with the ion detector, wherein the controlling unit alters the actuating elements in accordance with the specification for each compound, wherein a correspondence signal is displayed on a display unit if the detected intensity signal for the product ion corresponds with the stored int

Abstract: The invention provides a method and system for analyzing a gas for the presence of a reactant compound via reaction of primary ions of a specific type. A source gas is introduced to a reaction chamber and ionized in this chamber. The pressure in the reaction chamber is adjusted to avoid the formation of protonated species and other impurities. The primary ions generated in the reaction chamber are transferred to a drift tube. The gas to be analyzed is diluted with a carrier gas and the resulting mixture is introduced into the drift tube. The ionization energy of the carrier gas is equal to or higher than the ionization energy of the primary ions. The product ions resulting in the drift tube from a reaction of the primary ions with the reactant present in the gas to be analyzed are then detected, for example using a mass spectrometer. Preferably, an existing PTR-MS setup is used to perform the method of the present invention.

Abstract: A control clutch mechanism embodying a first aspect of the invention has an inner clutch part and an outer clutch part defining an annular space therebetween, with a viscous control unit and a frictional clutch unit being provided which consist of two sets of plates arranged in the annular space, each set of plates including plates alternately nonrotatively connected with one of the clutch parts, respectively. An axially movable annular piston is slidingly arranged in fluid-tight engagement between the viscous control unit and the frictional clutch unit and a pressure plate is located between the annular piston and the frictional clutch unit. A first stop is provided for the annular piston and a first spring acts between the piston and the pressure plate.

Abstract: A sealing assembly for a universal joint formed as an annular disc made of resilient material extending in sealing engagement between an inner joint member or a shaft part thereof and an outer joint member with the annular disc being in sealed engagement with the outer joint member and having a central bore formed with a diameter smaller than the diameter of the shaft of the inner joint member extending therethrough in order to effect sealing engagement with the shaft, the central bore being surrounded by a reinforcing annular portion which is dimensioned with an enlarged thickness for reinforcing purposes thereby to enable large angles of articulation to be endured even when the central bore is under extreme loads thereby to provide a rugged construction for the sealing assembly.

Abstract: A wheel assembly for a motor vehicle including a bearing assembly rotatably mounting a wheel and a universal joint for driving the wheel. An inner bearing ring of the wheel assembly is fitted in rotative driving engagement with the outer joint member of the universal joint and an outer circumferential portion of the inner bearing ring is formed with a configuration generally corresponding with the configuration of an inner contour of the outer joint member to establish a form-fitted rotative driving connection between the universal joint and the bearing assembly. A securing ring is provided for maintaining the inner bearing ring and the outer joint member axially fixed relative to each other and the fitted connection is formed with interfitting recesses and projections.

Abstract: A wheel hub assembly includes an internally ventilated brake disc. The brake disc is mounted on a flange-like extension of the inner bearing ring of the assembly. Slots are formed in the flange-like extension and the brake disc acts as a cover over the slots forming cooling channels extending radially outwardly in the wheel hub assembly to the cooling apertures in the radially outer part of the brake disc. A heat insulated cover disc can be positioned between the brake disc and the slots in the flange-like extension.

Abstract: A pair of torque-transmitting members are joined together in torque-transmitting relationship at an inner and outer tubular connecting part of each by connecting elements interposed within an annular recess formed between said inner and outer connecting parts, said connecting elements having acuminated portions and being formed of a material harder than the material of the connecting parts in order to penetrate the surface thereof when the connecting parts are pressed together thereby to hold the first and second members in torque-transmitting engagement.

Abstract: A bearing assembly for use with a motor vehicle wheel includes an inner sealing ring located within an outer sealing ring, and a constant velocity universal joint located within the inner bearing ring for driving a wheel hub. A contact seal is positioned between the spherical outside surface of the outer joint member of the universal joint and the inside surface of the inner bearing ring. The contact seal extends in the axial direction of the universal joint and has one end fitted into a groove in the inside surface of the inner bearing ring. A plurality of sealing lips extend inwardly from the inner surface of the contact seal into contact with the spherical outside surface of the outer joint member. The lips are spaced apart in the axial direction of the universal joint and extend perpendicularly to the spherical outer surface of the outer joint member. A reinforcing ring laterally encloses the outer surface of the contact seal.

Abstract: A universal joint assembly including an inner joint member, an outer joint member and torque transmission means interposed therebetween is formed with a tubular drive sleeve locked in engagement about the outer peripheral portion of the outer joint member. Axially extending grooves and at least one annular or circumferential groove are formed in the outer peripheral portion of the outer joint member and the tubular drive sleeve is shaped to conform with these grooves in order thereby to effect locking engagement between the outer joint member and the sleeve. A shaping roller may be used to mold the drive sleeve into conformity with the grooved configuration of the outer joint member.

Abstract: A constant velocity universal joint has an outer joint member with a cavity therein and an inner joint member within the cavity. A plurality of torque transmitting balls are positioned within opposed grooves formed in the facing surfaces of the inner and outer joint members. The balls are retained in a ball plane by a cage which has an inner concave surface guided upon a convex spherical surface of the inner joint member and an outer spherical surface guided within a spherical surface of the cavity. A portion of the outer face of the cage has a cylindrical configuration and is so positioned on the cage that the axis of the cylinder forms an angle with respect to the axis of the cage. The diameter of the cylindrical portion is less than the opening in the outer joint member to the cavity.