Abstract: A square tool holder (10) for an impact wrench is provided, including an anvil (1), on which a drive square (2) is situated for accommodating a tool, in particular an impact wrench socket, and including a safety bolt (3) for securing the accommodated tool, the safety bolt (3) being spring-mounted in the drive square (2) in such a way that the safety bolt is movable perpendicularly to the axis of rotation (D) of the anvil (1), the safety bolt (3) having a rounded, preferably hemispherical surface (3?), which protrudes from a holding surface (2?) of the drive square (2) in a state of spring-extension (AZ) of the safety bolt (3) and is at least partially countersunk in the holding surface (2?) in a state of spring-compression of the safety bolt (3), the safety bolt (3) being secured against falling out by at least one safety pin (4, 4?) situated in the drive square (2).

Abstract: A square tool holder (10) for an impact wrench is provided, including an anvil (1), on which a drive square (2) is situated for accommodating a tool, in particular an impact wrench socket, and including a safety bolt (3) for securing the accommodated tool, the safety bolt (3) being spring-mounted in the drive square (2) in such a way that the safety bolt is movable perpendicularly to the axis of rotation (D) of the anvil (1), the safety bolt (3) having a rounded, preferably hemispherical surface (3?), which protrudes from a holding surface (2?) of the drive square (2) in a state of spring-extension (AZ) of the safety bolt (3) and is at least partially countersunk in the holding surface (2?) in a state of spring-compression of the safety bolt (3), the safety bolt (3) being secured against falling out by at least one safety pin (4, 4?) situated in the drive square (2).

Abstract: A hand-held machine tool is disclosed. The tool has an electric motor and an output shaft which can be driven by the electric motor about a working axis. The output shaft has an intake space which is open on the output side for receiving a machine tool and which has two elongated holes cutting into the intake space in the radial direction. Blocking elements lie in the elongated holes and protrude into the intake space and are movable between an end on the output side of the elongated hole and an end on the drive side of the elongated hole. The blocking elements abut on a radial stop in the radial direction and are forced into the intake space in an engaging manner. The stop overlaps in a locked position with the ends on the output side of the elongated holes and can be moved in the withdrawal direction against a spring force of a spring for releasing a radial movement of the blocking elements from the engagement with the intake space.

Abstract: An electric screwdriver is disclosed. The screwdriver has a spindle, a locking body, a radial stop, a strap, and a spring. The spindle defines a receiving area and an oblong hole which is open into the receiving area in a radial direction. The locking body is disposed in the oblong hole, where the locking body is protrudable into the receiving area. The radial stop is engageable with the locking body where, when the radial stop engages with the locking body, the locking body protrudes into the receiving area. A first end of the strap engages behind the locking body on a drive end. The spring is disposed between a second end of the strap and the radial stop.

Abstract: A hand-held machine tool is disclosed. The tool has an electric motor and an output shaft which can be driven by the electric motor about a working axis. The output shaft has an intake space which is open on the output side for receiving a machine tool and which has two elongated holes cutting into the intake space in the radial direction. Blocking elements lie in the elongated holes and protrude into the intake space and are movable between an end on the output side of the elongated hole and an end on the drive side of the elongated hole. The blocking elements abut on a radial stop in the radial direction and are forced into the intake space in an engaging manner. The stop overlaps in a locked position with the ends on the output side of the elongated holes and can be moved in the withdrawal direction against a spring force of a spring for releasing a radial movement of the blocking elements from the engagement with the intake space.

Abstract: An electric screwdriver is disclosed. The screwdriver has a spindle, a locking body, a radial stop, a strap, and a spring. The spindle defines a receiving area and an oblong hole which is open into the receiving area in a radial direction. The locking body is disposed in the oblong hole, where the locking body is protrudable into the receiving area. The radial stop is engageable with the locking body where, when the radial stop engages with the locking body, the locking body protrudes into the receiving area. A first end of the strap engages behind the locking body on a drive end. The spring is disposed between a second end of the strap and the radial stop.

Abstract: An electrically adjustable variable capacitor device comprises a linear motor, at least one stator electrode and a movable electrode, thereby forming a variable capacitor. The linear motor comprises a piezoelectric transducer frictionally coupled to the movable electrode. Application of electrical signals to the piezoelectric transducer of the linear motor produces a motion of the surface of the piezoelectric transducer. The frictional coupling between the piezoelectric transducer surface and the movable electrode transmits a fraction of piezoelectric transducer motion to the movable piston electrode thereby changing the capacity of the variable capacitor. The amount and sign of the capacitance change is selectable by the operator through control of the electrical signals applied to the piezoelectric transducer.

Abstract: A cover device for partially covering a front, in an axial direction, side of a disc-shaped working tool (10) of a power tool includes a bearing element (22) securable on the shielding member (12), which partially radially covers the working tool (10), and having a bearing surface (28) abutting, at least regionwise, an outer surface (14) of the shielding member (12), a protective disc (30) extending substantially transverse to the bearing surface (28) of the bearing means (22), and engaging-from-behind elements (24) provided at opposite tangential ends of the bearing surface (28), respectively, with at least one of the engaging-from-behind elements (24) being elastically pivotal in a radial direction.

Abstract: A hand-held power tool, in particular an angle grinder, includes a housing (4) having, at its working tool side end, a tool head (6) to which a working tool (10) is secured; a main handle (14) connected to the housing (4) at its handle side end remote from the working tool side end of the housing (4), rotatable about a rotational axis (B), and having an adjustably inclined relative to the rotational axis (B).

Abstract: NMR coils are formed from transmission line comprising a tuned LC circuit determined substantially from the distributed capacitance and inductance of the transmission line operated in common mode. Introduction of gaps staggered between opposite conductors of 2-conductor transmission line contribute a desired distributed capacitance with reduced effective inductance to sustain resonant behavior at higher frequency than achievable with conventionally tuned coils and with relaxation of dimensional constraints as the resonant half wavelength approaches coil dimensions.

Abstract: A device for exhaust-gas purification utilizes reduction of nitrogen oxides which are present in the exhaust gas from internal combustion engines by way of gaseous ammonia with an SCR catalytic converter. The functions of the device are monitored with regard to their line paths with connections, valves and sensors by referring to these elements themselves using suitable control circuitry via the evaluation and control unit.

Abstract: NMR coils are formed from transmission line comprising a tuned LC circuit determined substantially from the distributed capacitance and inductance of the transmission line operated in common mode. Introduction of gaps staggered between opposite conductors of 2-conductor transmission line contribute a desired distributed capacitance with reduced effective inductance to sustain resonant behavior at higher frequency than achievable with conventionally tuned coils and with relaxation of dimensional constraints as the resonant half wavelength approaches coil dimensions.

Abstract: An exhaust gas purification system for denoxing exhaust gases of a combustion unit on an SCR catalyst 2 utilizing ammonia (NH3) additionally introduced into the exhaust gas flow before the SCR catalyst 2, which has at least one reducing agent container 4, in which the NH3 (5) to be supplied to the exhaust gas flow is stored, which container 4 is connected via a supply line 7 with the exhaust gas line 1, and is adapted so that at least one reducing agent container 4 is held in a docking device 15 as a portion of the exhaust gas purification system 3 and, via a coupling 20, 21, is connected with the supply line 7. Of coupling 20, 22 one coupling part 22 is associated with the docking device 15 and the other coupling part 20 with the container 4, so that both coupling parts 20, 22 can be engaged with one another via an axial movement directed toward one another.

Abstract: A device for exhaust-gas purification utilizes reduction of nitrogen oxides which are present in the exhaust gas from internal combustion engines by way of gaseous ammonia with an SCR catalytic converter. The functions of the device are monitored with regard to their line paths with connections, valves and sensors by referring to these elements themselves using suitable control circuitry via the evaluation and control unit.

Abstract: An exhaust gas purification system for denoxing exhaust gases of a combustion unit on an SCR catalyst 2 utilizing ammonia (NH3) additionally introduced into the exhaust gas flow before the SCR catalyst 2, comprising at least one reducing agent container 4, in which the NH3 (5) to be supplied to the exhaust gas flow is stored, which container 4 is connected via a supply line 7 with the exhaust gas line 1, and is adapted so that at least one reducing agent container 4 is held in a docking device 15 as a portion of the exhaust gas purification system 3 and, via coupling means 20, 21, is connected with the supply line 7. Of coupling 20, 22 one coupling part 22 is associated with the docking device 15 and the other coupling part 20 with the container 4, so that both coupling parts 20, 22 can be engaged with one another via an axial movement directed toward one another.

Abstract: A multi-cylinder air-compressing injection-type internal-combustion engine having a nitric oxide adsorber catalyst and an exhaust gas return device. In order to increase the hydrocarbon fraction in the exhaust gas in front of an exhaust gas aftertreatment device during a regeneration phase and to reduce the oxygen content, exhaust gas pipes of the cylinders are divided into at least two flows, which extend separately from one another at least along a distance. An increased hydrocarbon emission is generated exclusively in the cylinders of one of the flows at times. Another of the flows is connected by way of the exhaust gas return device with an air intake pipe of the internal-combustion engine.