Abstract: A heating device operating with liquid fuel in the single-line mode includes a fuel pump which draws fuel from a supply tank and delivers it into a pressure line region communicating with an atomiser nozzle opening into a combustion chamber, wherein excess fuel is returned from the pressure region to the suction side of the fuel pump by way of a pressure regulator, a return line and a bypass line. Arranged between the return line and the bypass line is a venting apparatus including an actuating element which is reciprocable between an operating position and a venting position and which in the operating position connects the return line to the bypass line to reliably seal the medium in the lines towards the exterior and in the venting position connects the return line to the exterior of the heating device and in that case closes the bypass line.

Abstract: A heating device operating with liquid fuel in the single-line mode includes a fuel pump which draws fuel from a supply tank and delivers it into a pressure line region communicating with an atomiser nozzle opening into a combustion chamber, wherein excess fuel is returned from the pressure region to the suction side of the fuel pump by way of a pressure regulator, a return line and a bypass line. Arranged between the return line and the bypass line is a venting apparatus including an actuating element which is reciprocable between an operating position and a venting position and which in the operating position connects the return line to the bypass line to reliably seal the medium in the lines towards the exterior and in the venting position connects the return line to the exterior of the heating device and in that case closes the bypass line.

Abstract: A heater (10), especially a motor vehicle heater (10), which has device for determining the temperature and/or which works as overheating protection. It is provided that the device for determining the temperature and/or the work as overheating protection has a flow sensor (12) which works according to the calorimetric measurement principle. Furthermore, the flow sensor (12) which works according to the calorimetric measurement principle is used as a temperature sensor for determining the temperature and/or for making available overheating protection.

Abstract: A hatch for an opening in a fixed roof surface of a motor vehicle such as a bus, commercial vehicle or camping vehicle. The hatch includes a frame for insertion into the roof opening, a selectively movable cover supported by the frame, and a lining for at least partially covering or clearing the roof opening or the cover. The lining is attached roof-mounted by way of a connecting site which is made such that the lining can be manually removed without a tool in order to at least partially clear the roof opening or the cover.

Abstract: A hatch in a fixed roof surface of a motor vehicle with a frame (1) which is located in the roof cutout in the roof surface, with a cover (2) which can be opened and closed relative to the frame (1) via a raising mechanism, and with an actuating mechanism for the raising mechanism, the raising mechanism having a first pair of toggle joints (3 and 4) which are supported on the frame (1) to raise one edge of the cover (2) and a second pair of toggle joints (5 and 6) which are supported on the frame (1) to raise the opposite edge of the cover (2), and the actuating mechanism having a transmission mechanism (24) which can be moved along the frame (1), which is guided on the frame (1), and to which actuating elements (28, 29 and 30, 28′, 29′, 30′) are attached for simultaneous actuation of the toggle joints of a respective one of the first and second pairs of toggle joints (3, 4 and 5, 6).

Abstract: A device for treating internal surfaces of cylindrical objects by rubbing includes a plurality of rubbing pins each provided with two pin clamping devices one of which is displaceable relative to the other so that each pin can be adjusted relative to a workpiece.

Abstract: A device for coating metallic internal surfaces of cylindrical objects, particularly cylindrical sliding sleeves, by rubbing materials onto said surfaces includes one or a plurality of rubbing heads each including rubbing pins positioned in said rubbing head at an angle relative to each other. Each rubbing head is displaceable along an axis thereof. A rotationally-fixed housing carries a rotatable bevel gear. The rubbing head is rotational and provided with pinions meshed with said bevel gear.