Abstract: A headrest for a vehicle seat includes an upholstered support surface for supporting an occupant's head and a neck rest. The neck rest is pivotable between a flat position and an angled position by a friction hinge such that an end region of the neck rest forms a part of the upholstered support surface in the flat position and the end region of the neck rest stands angled in relation to the upholstered support surface and delimits the upholstered support surface in the angled position.

Abstract: The invention relates to a cryogenic process for recovering valuable components, in particular hydrogen, from a hydrogen-rich feed gas, in particular a hydrogen-rich natural gas, comprising the following steps: in a first separation column (T1), hydrocarbons having two or more carbon atoms are separated off, in a second separation column (T2), methane is separated off, and in a third separation column (T3) nitrogen is separated off, the hydrogen-rich feed gas, after optional precleaning R, being fed to the separation columns T1 to T3 according to steps a) to c) and being separated in the separation columns into a liquid fraction, the bottom product, and a gas fraction, the overhead product. In the cryogenic process according to the invention, the cold supply preferably takes place at least partially through one or more refrigeration cycles.

Abstract: A system or a method for measuring flow of fluid or gas, has a flow duct with at least two transducers which generate at least one beam of ultrasound in the flow duct in which ultrasound transducers are placed in a fixed positions in a duct for flowing air where the electronic device for analyzing signal from the transducers is performed in a handheld device. A transmitter circuit is permanently connected to the transducers and a receiver circuit is placed in a handheld device. The transmitter circuit has calibration data representing the actual placement of the transducers in relation to the actual duct, which calibration data is communicated by every connection to the receiver circuit. Hereby can be achieved that transducers can be permanently placed in ventilation ducts in buildings, where placement of ultrasound transducers for measurement and for calibration of measurement of an air stream is nearly impossible.

Abstract: A system or a method for measuring flow of fluid or gas, has a flow duct with at least two transducers which generate at least one beam of ultrasound in the flow duct in which ultrasound transducers are placed in a fixed positions in a duct for flowing air where the electronic device for analyzing signal from the transducers is performed in a handheld device. A transmitter circuit is permanently connected to the transducers and a receiver circuit is placed in a handheld device. The transmitter circuit has calibration data representing the actual placement of the transducers in relation to the actual duct, which calibration data is communicated by every connection to the receiver circuit. Hereby can be achieved that transducers can be permanently placed in ventilation ducts in buildings, where placement of ultrasound transducers for measurement and for calibration of measurement of an air stream is nearly impossible.

Abstract: A system or a method for measuring flow in a flow duct has at least two ultra sound transducers. The flow of air in a duct is measured by one or more transducers transmitting beams of ultra sound controlled by a microcontroller based electronic system in which the microcontroller stores a vector of data samples for each direction of transmission, which vector includes an appropriate number of N samples forming a frame, the microcontroller multiplying each value of the frame which a complex number. Based on the result, the microcontroller calculates the flow in the duct. As a result, an efficient flow measurement of air flowing in a duct can be achieved.

Abstract: A system or a method for measuring flow in a flow duct has at least two ultra sound transducers. The flow of air in a duct is measured by one or more transducers transmitting beams of ultra sound controlled by a microcontroller based electronic system in which the microcontroller stores a vector of data samples for each direction of transmission, which vector includes an appropriate number of N samples forming a frame, the microcontroller multiplying each value of the frame which a complex number. Based on the result, the microcontroller calculates the flow in the duct. As a result, an efficient flow measurement of air flowing in a duct can be achieved.

Abstract: A method is described for separating off trace components from a fraction (1) containing at least nitrogen and helium, wherein this fraction is partially condensed (E) before enrichment of the helium. The partially condensed fraction (2) is fed at least in part to at least one separation column (T) and separated therein into a helium-rich gas fraction (6) and a nitrogen-rich liquid fraction which also contains the unwanted trace components (5).

Abstract: A method is described for separating off trace components from a fraction (1) containing at least nitrogen and helium, wherein this fraction is partially condensed (E) before enrichment of the helium. The partially condensed fraction (2) is fed at least in part to at least one separation column (T) and separated therein into a helium-rich gas fraction (6) and a nitrogen-rich liquid fraction which also contains the unwanted trace components (5).

Abstract: The invention relates to a method for liquefying a hydrocarbon-rich fraction (1, 1?) which contains substantially methane, hydrogen and nitrogen. In the inventive method, before the liquefaction (V) of the hydrocarbon-rich fraction (1, 1?), the hydrogen (2) is removed (M) by permeation. This removal (M) of the hydrogen (2) by permeation is effected in a single-stage or multistage removal process.

Abstract: The invention relates to a method for separating off nitrogen and lighter components, in particular hydrogen, carbon monoxide, neon and argon, from a feed fraction (e.g., natural gas) that is to be liquefied containing at least methane, nitrogen and hydrogen. The cooling and liquefaction of the feed fraction proceeds against the refrigerant or mixed refrigerant of at least one refrigeration cycle. In the inventive method, the feed fraction (1) is partially condensed (E1), and separated in at least one rectification column (T) into a methane-rich fraction (6) and a fraction (4) containing nitrogen and lighter components. The methane-rich fraction (6) is subcooled. Additionally, cooling of the top condenser (E2) of the rectification column (T) proceeds via a refrigerant or mixed refrigerant or a substream of the refrigerant or mixed refrigerant of at least one, refrigeration cycle (20-24).

Abstract: A process is proposed for liquefying a hydrocarbon-rich fraction (A), especially natural gas, by a) liquefying the hydrocarbon-rich fraction (A) against the coolant mixture of a cooling circuit, b) compressing the coolant mixture in at least two stages (C1, C2), c) partially condensing (E1) the compressed coolant mixture (2) at least downstream of the penultimate compressor stage (C1), d) compressing (C2) the lower-boiling gas fraction (2?) obtained to the final pressure, e) while cooling (E) the first higher-boiling liquid fraction (3) obtained, expanding it (a) to perform cooling and vaporizing it (E) against the hydrocarbon-rich fraction (A) to be cooled, f) partially condensing (E2) the coolant mixture fraction (4) compressed to the final pressure and separating the first lower-boiling gas fraction (5) obtained, after partial condensation (E), into a second lower-boiling gas fraction (7) and a second higher-boiling liquid fraction (6), and g) liquefying and subcooling (E) the second lower-boiling gas fra

Abstract: The present invention relates generally to a rigless well intervention apparatus and method for well completion, recompletion, servicing, workover and intervention. Specifically, the present invention relates to a rigless well intervention apparatus and method for performing various well completion, recompletion, servicing, workover and intervention operations that pertains to a range of products, services and techniques whether designed to be run through, or conducted within, the production tubing of an oil or gas well, or not, ranging from the ability to operate within a restricted diameter tubular with live-well intervention when the tubing is in place to the ability to drill the well.

Abstract: For liquefying a hydrocarbon-rich fraction, in particular natural gas, the hydrocarbon-rich fraction which is to be liquefied is merely cooled and liquefied against a coolant mixture, and the coolant mixture, before its cooling, is separated into a gas phase and a liquid phase, and wherein the gas (5) and the liquid phases (6) are cooled (E) separately and not until after cooling (E) has been performed are they expanded (a, b) and recombined (8).

Abstract: A process for separating a helium-rich fraction from a liquefied natural gas stream, is disclosed. In an embodiment, the process includes expansion of a liquefied natural gas stream and separation of the helium-rich fraction. The helium-rich fraction is heated countercurrent to a natural gas stream to be cooled and liquefied. The natural gas stream liquefied in a heat exchange countercurrent to the helium-rich fraction to be heated is fed prior to and/or in the separation of the helium-rich fraction. The total enthalpy of the mixture of the two aforementioned natural gas streams brought to the separation of the helium-rich fraction is variable.

Abstract: A method for liquefying a hydrocarbon-rich stream is disclosed. In an embodiment, the hydrocarbon-rich stream is liquefied in a heat exchanger countercurrent to a three component refrigerant mixture. The refrigerant mixture is compressed in a two stage compressor. The refrigerant mixture is separated into a higher boiling fraction and a lower boiling fraction. A fluid fraction is recovered from a partial stream of the lower boiling fraction. The fluid fraction is supercooled and expanded to a pressure of the higher boiling fraction and the fluid fraction is provided to a compressor stage to which the higher boiling fraction is taken.

Abstract: A process for simultaneous recovery of a pure helium and a pure nitrogen fraction from a feed stream containing at least methane, nitrogen and helium, is disclosed. The feed stream is partially condensed and separated into a helium-rich gas fraction and a nitrogen- and methane-rich liquid fraction. The helium-rich gas fraction is conveyed to a purification stage in which a pure helium fraction is recovered by adsorption, permeation and/or rectification. At least one partial stream of the nitrogen- and methane-rich liquid fraction is taken to a rectification process for recovery of a pure nitrogen fraction.

Abstract: A method for separating hydrogen, helium and/or neon from a nitrogen-rich liquid fraction present at a pressure of at least 10 bar is disclosed. The nitrogen-rich liquid fraction is expanded and undergoes phase separation where expansion takes place at a pressure which allows separation of hydrogen, helium and/or neon except for residues of less than 20 ppmV.

Abstract: The present invention relates generally to a rigless well intervention apparatus and method for well completion, recompletion, servicing, workover and intervention. Specifically, the present invention relates to a rigless well intervention apparatus and method for performing various well completion, recompletion, servicing, workover and intervention operations that pertains to a range of products, services and techniques whether designed to be run through, or conducted within, the production tubing of an oil or gas well, or not, ranging from the ability to operate within a restricted diameter tubular with live-well intervention when the tubing is in place to the ability to drill the well.

Abstract: A system for controlling the radiation dose in a pulse of radiation having a relatively large dose, in which a pulsed beam of radiation is divided into a plurality of pulsed sub-beams of radiation and the radiation dose of the pulses is adjusted after the radiation beam has been divided.

Abstract: Apparatus and methods for compensating for the movement of a substrate in a lithographic apparatus during a pulse of radiation include providing a pivotable mirror configured to move a patterned radiation beam incident on the substrate in substantial synchronism with the substrate.