Abstract: The invention relates to a gear unit with hollow shaft for gate drives, preferably for driving sectional and roller gates. According to the invention the gear unit comprises a hollow shaped part which can be introduced into the hollow shaft, the outside and inside of which are made in such a way that the connection with a shaft to be accomodated in the hollow shaped part and with the hollow shaft accomodating the hollow shaped part is form-locking in the turning direction.

Abstract: The present invention relates to a drive system for closing elements, preferably for doors, roller blinds or windows, with a motor, with a position pick-up to detect certain positions of the closing element, with an operating unit which allows authorized persons to open or close the closing element, and with a control unit with the control unit being actively linked to the motor, the position pick-up and the operating unit. To solve the object of preventing any arbitrary opening in such a drive system without using additional locking elements and without any self-locking effect of the drive system, the motor can be driven by the control unit at times where no command to open exists from the operating unit in such a way that a closing force can be exerted on the closing element which closing force depends on the position and/or change in position of the closing element.

Abstract: A connecting element for holding at least one profiled belt end comprises at least two parts which can be connected to one another and in the installed state, enclose the belt end. One or more of the parts have sections with a negative profile corresponding to the belt end. The belt end is inserted into one or more of the parts in manner such that connection is formed-locking in all directions that deviate from the direction of the joint.

Abstract: The invention refers to a door or gate leaf having a plurality of plates hingedly connected to each other via hinge connections, said plates being pivotable with respect to each other when they are moved from the open position to the closing position or viceversa, wherein the plates each have a front wall and a rear wall as well as at least one plate edge resting against a respective plate edge of an adjacent plate, wherein a first plate edge has a profile with a profile section having a substantially concave design, wherein a second plate edge lying opposite thereto has a convex-shaped profile section being complementary to the concave-shaped profile section, wherein the curvatures of the concave-shaped or convex-shaped profile sections partially extend in a curved manner, in particular in a circular manner, or extend in a polygonal form approximately tracing the course of the curve, and, with its or their center(s) of the circle, lie approximately in or near the adjacent hinge axis or, with its or their pol

Abstract: The invention concerns contact components for a limit switch for gate dri, namely at least one first contact component and at least one second contact component, wherein one of the contact components is arranged to move when the gate is opened or closed. At least the first contact component has a preferably arc-shaped side extending in the direction of contact with the second contact component; the second contact component is flexible in this direction.

Abstract: A remote control for the wireless transmission of control commands from a ansmitter to at least one receiver, with an encoding device provided in the transmitter which effects an encoding of the control commands to be transmitted. In a first transmitter different codes are stored for each receiver. Via a data link between the first transmitter and a second transmitter, which data link can be made temporarily, at least one code is transferred from the encoding device of the first transmitter to the encoding device of the second transmitter.

Abstract: A control system for an electrical motor drive for moving a door between end positions. The two end positions are detected by the control system, and an increment detector associated with the motor drive reproduces the movement cycle of the door. A stop associated with the motor drive marks an end position of the door that corresponds to the open position thereof. This open position is treated as a reference point. A pulse storage device is set to a specific value at this reference point and initiates the beginning of a pulse sequence to reproduce movement of the object between the end positions. The pulse sequence is compared for coincidence with pulses produced by the increment detector upon movement of the door into the opposite end position that corresponds to its closed position.

Abstract: Drive mechanism for a drive carrier (17) which is drivable for back and fh movement along a guide rail (10), which is connectable to a correspondingly drivable object, having a drive system (1) with a reducing gear (3) and output head (4) and having a drive web (11) driven by same and connectable to the drive carrier which is looped over a turn-around device intended to be located at the end of guide rail (10) facing away from drive system (1), which drive mechanism is so constructed for the purpose of space-saving storage and/or transportation and also orderly final assembly after connection of the guide rails without the risk of a faulty drive web run, in such manner that the drive system (1) or its output head (4) has a storage section (8) in which the drive web (11), looped over the output head and dimensioned for the total guide rail length, shortened in its lengthwise direction by wavelike folds (13,14) is contained in a small space, together with the turn-around device (12), to which storage section (8

Abstract: The invention relates to apparatus for driving a door or the like guided in t least two guides using a drive (1) located in a channel formed as a guide track (2) and which consists of at least one turn-around pinion (5), a chain extending over drive pinion (4) and turn-around pinion (5) and at least one carrier element for a door panel or the like attached to the chain. A structurally simple apparatus which is installable in simple manner is achieved by forming the drive pinion (4), the turn-around pinion (5) and the chain together with the guide track (2) as completely preassembled unit (1).(FIG.

Abstract: A sliding door which is moveable back and forth by a stationary drive motor nit, which has a drive pinion meshing with a gear rack attached to the door or the door's bottom rail, the gear rack being made of a series of adjacent rack segments extending in the sliding direction of the door and inserted in a retaining channel affixed to the door, the segments being manufactured as finished molded pieces and attached to each other with uniform tooth pitch along the rack, whereby the rack is low in cost, adaptable to various door displacement distances, and parts which are subject to heavy wear are readily replaceable.