Abstract: A gate assembly includes a sliding gate, a drive having a motor and motor pinion gear for driving the sliding gate, and a force transmission element for transmitting a driving force from the drive to the sliding gate. The force transmission element includes at least one threaded bolt having a bolt head, and a toothed rack engaged with the motor pinion gear. The toothed rack includes a toothed element having a base defining a first side having teeth attached thereto, and a second side opposite to the first side and forming a groove extending in a longitudinal direction of the toothed element for accommodating the bolt head. The groove defines a groove width corresponding to a width of the bolt head. The toothed rack further includes a support element connected with the sliding gate using the at least one bolt, and that is adapted to receive the toothed element. The support element includes at least one through bore for receiving the at least one bolt.

Abstract: An insulated curtain slat for use in a roller curtain has inner and outer skins. The outer skin is typically made of a metal to protect against weather conditions, and the inner skin is generally made of a plastic material to minimize the transfer of heat between the inside and outside of the curtain. A space between the skins is foamed with an insulating material. The top and bottom of the outer skin are formed with hook-like ridges, so that neighboring slats may engage one another at a joint to form the roller curtain. A sealing edge is fastened to an edge of the inner skin of each slat. The sealing edge spans the joint between the neighboring slats and contacts the inner skin of the adjacent slat, thereby sealing the joint. The sealing edge is made of a rubber or elastic plastic material which, along with an air pocket created by the sealing edge, further reduces the transfer of heat between the inside and the outside of the roller curtain.