Abstract: A hoop lock comprises a lock body and a hoop which is lockable to the lock body. The hoop comprises a metal tube having a cavity extending in a longitudinal direction of the tube. In the cavity is a reinforcing filling. At least one hoop end comprises a locking structure for a locking engagement with a locking device of the lock body. The locking structure is formed at an outer side of the tube without forming an opening to the cavity of the tube.

Abstract: An electronic two-wheeler lock includes a latch element movable between an open position and a closed position, a blocking mechanism that blocks the latch element in a latched state against departing from the closed position and releases it for a departure from the closed position in an unlatched state, an electric drive unit configured to move the blocking mechanism into the unlatched state, and a control unit configured to control the drive unit. The two-wheeler lock has a modular structure and includes a drive module and a communication unit, with the drive module including a module housing in which at least the blocking mechanism, the drive unit, and the control unit are received. The control unit is configured to receive control signals from the communication unit in encrypted form and to control the drive unit in response to the control signals.

Abstract: An electronic two-wheeler lock includes a latch element movable between an open position and a closed position, a blocking mechanism that blocks the latch element in a latched state against departing from the closed position and releases it for a departure from the closed position in an unlatched state, an electric drive unit configured to move the blocking mechanism into the unlatched state, and a control unit configured to control the drive unit. The two-wheeler lock has a modular structure and includes a drive module and a communication unit, with the drive module including a module housing in which at least the blocking mechanism, the drive unit, and the control unit are received. The control unit is configured to receive control signals from the communication unit in encrypted form and to control the drive unit in response to the control signals.

Abstract: An intake air filter (1) is for an internal combustion engine, especially in a motor vehicle. The filter has a filter housing (2) having a raw air inlet (4), a pure air outlet (5), and an annular filter element (3) which is arranged in the filter housing (2) and through which air can flow in a radial manner from the outside towards the inside. The filter element has a first end disk (10) on the axial end thereof, said disk has an opening (12) by which means the pure air outlet (5) communicates with the inside (8) of the annular filter element (3). The purpose is to reduce the influence of a secondary air induction on the fresh air supply of the internal combustion engine. To this end, the filter housing (2) has a secondary air outlet (6), on the pure air side, and the annular filter element (3) has a second end disk (11) on an axial end opposing the first end disk (10).

Abstract: The invention relates to an intake air filter (1) for an internal combustion engine, especially in a motor vehicle. The inventive filter comprises a filter housing (2) having a raw air inlet (4), a pure air outlet (5), and an annular filter element. (3) which is arranged in the filter housing (2) and through which air can flow in a radial manner from the outside towards the inside. Said filter element comprises a first end disk (10) on the axial end thereof, said disk comprising an opening (12) by which means the pure air outlet (5) communicates with the inside (8) of the annular filter element (3). The aim of the invention is to reduce the influence of a secondary air induction on the fresh air supply of the internal combustion engine. To this end, the filter housing (2) comprises a secondary air outlet (6), on the pure air side, and the annular filter element (3) comprises a second end disk (11) on an axial end opposing the first end disk (10).