Abstract: A process for the epoxidation of propene involves reacting propene with hydrogen peroxide, in the presence of a methanol solvent and a shaped titanium zeolite epoxidation catalyst in a fixed bed reactor. The process then involves recovering methanol from the reaction mixture, treatment of the recovered methanol by passing it through a bed of an acidic ion exchange resin, and recycling the treated methanol to the epoxidation reaction; as well as regeneration of the acidic ion exchange resin. Catalyst breakage can be reduced or avoided by washing the regenerated bed of an acidic ion exchange resin with methanol until the methanol exiting the resin bed has an apparent pH higher than 1.8, before methanol treated with the acidic ion exchange resin is recycled to the epoxidation reaction.

Abstract: A vehicle has at least one component which is cooled by a cooling air mass flow delivered from a conveying device such as a fan or a spoiler. A nominal value is predetermined for the cooling air mass flow which, for an assumed maximum thermal loading of the component, cools adequately for operation of the component. A control device controls an intensity of the cooling air mass flow and dimensions it, taking into consideration thermal demands of the component at least in an upper driving speed range, such that a sum of a power consumption of the component, of the conveying device and of a portion of a traction power of the vehicle that is allotted to the delivery of the cooling air mass flow is smaller than a sum of the power consumption of the component, the conveying device and the portion that is allotted to the delivery of the cooling air mass flow at the predetermined nominal value thereof, of a traction power of the vehicle.

Abstract: An air duct system for a passenger rail vehicle has a first component venting duct with at least one opening to a second component venting duct and at least one air outlet for ventilating an inner space of the rail vehicle. Furthermore, a membrane that can be held in a formable and/or movable manner is arranged on the air duct system in such a manner that the membrane reduces and or closes the opening and opens the air outlet in a first state and reduces or closes the air outlet and opens the opening in a second state.

Abstract: A vehicle has at least one component which is cooled by a cooling air mass flow delivered from a conveying device such as a fan or a spoiler. A nominal value is predetermined for the cooling air mass flow which, for an assumed maximum thermal loading of the component, cools adequately for operation of the component. A control device controls an intensity of the cooling air mass flow and dimensions it, taking into consideration thermal demands of the component at least in an upper driving speed range, such that a sum of a power consumption of the component, of the conveying device and of a portion of a traction power of the vehicle that is allotted to the delivery of the cooling air mass flow is smaller than a sum of the power consumption of the component, the conveying device and the portion that is allotted to the delivery of the cooling air mass flow at the predetermined nominal value thereof, of a traction power of the vehicle.

Abstract: A vehicle, in particular electric wheelchair, having a chassis and a driver's seat which is fastened thereto and can be set in its inclination with respect to the chassis. The vehicle includes an inclination sensor which determines the angular position (?) of the seat surface of the driver's seat with respect to the horizontal (H), an adjusting device which is connected to the chassis and to the driver's seat, and a control and regulating device which is operatively connected to the inclination sensor and the adjusting device and via which the driver's seat can be pivoted by the adjusting device in such a manner that its seat surface is always situated essentially parallel to the horizontal (H).

Abstract: A decoating device for axially symmetric components, particularly from aircraft engines is provided, the decoating process being carried out through the use of a decoating fluid-which is brought on a localized basis into contact with the component to be decoated, a receptacle for holding the decoating fluid being provided that rotates at least about one axis of rotation, and the decoating fluid surface forming a rotation paraboloid in response to the rotation, the component(s) to be decoated on a localized basis being accommodated in the receptacle and being dipped on the radially outer side into the decoating fluid. A decoating device is thereby devised which makes it possible for radially symmetric components to be decoated in the radially outer region in a simple process.

Abstract: A running wheel arrangement for a wheelchair that can be driven by electric motor including a frame and wheels releasably connected. A driving motor being integrated in two wheels and the wheels are connected via a respective adapter arranged on the frame. The wheel is inserted into the adapter and mechanically lockable via a locking device which includes: a pivot plate fastened to the driving motor; the wheel is mounted rotatably in a pivot plate via an axle bolt; a link bolt pointing in the direction of travel arranged in the adapter; a cross-sectionally U-shaped tab arranged at one end of the pivot plate; the tab being placed onto the link bolt such that the wheel is shifted by means of a pivoting movement toward the frame until a locking bolt provided on the pivot plate engaged on the locking bush arranged on the adapter, and the wheel is locked mechanically with respect to the frame via the locking bolt and the locking bush.

Abstract: Disclosed is a wheelchair, particularly an electric wheelchair, comprising a frame (20), at least one steerable wheel (3), two non-steerable wheels (5) which are connected to the frame (20) at a wheelbase (R), and a seat (10) that is fastened to the frame (20) and is provided with a back rest (8). The inventive wheelchair is characterized by the fact that the wheelbase (R) is adjustable.

Abstract: Disclosed is a wheelchair, particularly an electric wheelchair, comprising a frame (20), at least one steerable wheel (3), two non-steerable wheels (5) which are connected to the frame (20) at a wheelbase (R), and a seat (10) that is fastened to the frame (20) and is provided with a back rest (8). The inventive wheelchair is characterized by the fact that the wheelbase (R) is adjustable.

Abstract: A running wheel arrangement for an in particular collapsible wheelchair which can be driven by electric motor, to whose frame (2) wheels (12) can be releaseably connected, with a respective driving motor (1) being integrated in two wheels (12), and the connection of these wheels (12) taking place via a respective adapter (7) arranged on the frame (2), and the wheel inserted into the adapter (7) being mechanically lockable via a locking device (5, 6), comprises the following features: a) a pivot plate (3) is fastened to the driving motor (1), b) the wheel (12) is mounted rotatably in the pivot plate (3) via an axle bolt (4), c) a link bolt (8) pointing in the direction of travel F is arranged in the adapter (7), d) a cross-sectionally U-shaped tab (31) is arranged at one end of the pivot plate (3), e) the tab (31) can be placed onto the link bolt (8) in such a manner that the wheel (12) can be shifted by means of a pivoting movement toward the frame (2) until a locking bolt (5) provided on the pivot plate

Abstract: A vehicle, in particular electric wheelchair, having a chassis and a drivers seat which is fastened thereto and can be set in its inclination with respect to the chassis, comprises an inclination sensor which determines the angular position (?) of the seat surface of the driver's seat with respect to the horizontal (H), an adjusting device which is connected to the chassis and to the driver's seat, and a control and regulating device which is operatively connected to the inclination sensor and the adjusting device and via which the driver's seat can be pivoted by means of the adjusting device in such a manner that its seat surface is always situated essentially parallel to the horizontal (H).

Abstract: A wheelchair having two driven wheels (40) and at least one castor (1) which is mounted in a rotatable manner in a fork (2) which can be pivoted about a vertical axis (H), the fork (2) being connected to a steering linkage (3, 3′, 30), is distinguished in that the connection between the fork (2) and the steering linkage (3, 3′, 30) is releasable.

Abstract: A diffusion collector for analytes contained in liquid phases includes a planar housing which has channel-like cavities. A collecting phase is inserted into these channel-like cavities. The collecting phase is covered by a diffusion membrane through which the analyte can pass. The housing has at least one incoming pipe and one outgoing pipe allowing the fluid medium to pass through the channel-like cavities perpendicular to the direction of diffusion.

Abstract: A manually propelled vehicle has a power assisted drive wheel assembly coupled to a stationary chassis and a control system for actuating the powering. The drive wheel assembly is integrated with a gearless electric motor. The motor includes a stator and a rotor rotatable relative to the stator. The drive wheel assembly includes a stationary wheel support coupled to the chassis and a rotatable drive wheel rotatably mounted to the stationary wheel support. The drive wheel has an outer rim and an inner ring, the outer rim being connected to the inner ring by support members. The stationary wheel support includes a first annular well for housing the control system and a power source, and a second annular well formed concentrically around the first annular well. The stator is mounted to the stationary wheel support in the second annular well and the rotor is mounted to the inner ring, which is rotatably coupled to the distal portion of the stationary wheel support via bearings.

Abstract: A rail vehicle has a longitudinal direction and includes an undercarriage, a crossbeam held against the undercarriage, extending transversely to the longitudinal direction of the superstructure and adapted for being seated on a bogie or similar structure. A mechanism is provided for elastically holding the crossbeam to the undercarriage.

Abstract: The invention relates to a center of gravity control display system for measuring the human body and/or prosthetic or orthotic fittings in their positions relative to the human body. According to the invention, this system consists of a measuring plate (1) for determining center of gravity (4) projected in the plane of measuring plate (1), of a person standing on measuring plate (1), and of a projection device (2) for projecting a perpendicular measuring line onto the body of said person, with measuring plate (1) being provided with pressure sensors (3) connected with one another by a circuit, said sensors delivering an electrical signal defining the determined center of gravity position, said signal controlling a drive that displaces an optical system in a plane parallel to that of measuring plate (1), said system projecting a light beam (19) as a vertical measuring line that defines a plane in which center of gravity (4) of the person being measured lies.

Abstract: A reactor apparatus for treating solid materials, liquids and gases, includes a plurality of units being assembled in modular form.

Abstract: A process of producing copper-cored titanium wire of less than 16 gauge comprising cold drawing, in a multiplicity of passes, a titanium tube filled with copper powder.