Abstract: An air filtration system for a vehicle cab has an air recirculation circuit which includes an air recirculation blower arranged in an air recirculation channel system in order to draw air from the cab interior and to blow it back into the cab interior. An air recirculation filter is arranged in the air recirculation flow. In order to reliably avoid contamination of the cab interior during filter changes, the air recirculation filter is located in a portion of an outer wall of the cab roof behind a cover. The cover covers the air recirculation channel system hermetically from the cab exterior. When the cover is opened, the air recirculation filter is accessible from the outside.

Abstract: A hand tool for expanding hollow bodies contains a casing (2) having a laterally extending first hand lever (3). A second hand lever, (7) which consists of steel and is joined to the casing so as to pivot on a shaft (5), bears a pinion sector (6) surrounding the shaft (5). The two hand levers (3, 7) form a pliers In the casing (2) a bore is disposed for guiding a rack consisting of steel, one end of which cooperates within the bore with the pinion sector (6) such that an expansion wedge can be displaced outwardly by a closing movement of the two hand levers (3, 7). The casing has means by which an expansion head with radially moving expander jaws can be placed coaxially onto the outwardly tapered end of the spreading wedge. To reduce both the weight and the force required for operation, the casing (2) and its hand lever (3) consist of a light material from the plastic and light metal group. The casing (2) thus forms together with the rack a low-friction combination of light material and steel.

Abstract: A hand tool for expanding hollow bodies contains a casing (2) having a laterally extending first hand lever (3). A second hand lever, (7) which consists of steel and is joined to the casing so as to pivot on a shaft (5), bears a pinion sector (6) surrounding the shaft (5). The two hand levers (3, 7) form a pliers In the casing (2) a bore is disposed for guiding a rack consisting of steel, one end of which cooperates within the bore with the pinion sector (6) such that an expansion wedge can be displaced outwardly by a closing movement of the two hand levers (3, 7). The casing has means by which an expansion head with radially moving expander jaws can be placed coaxially onto the outwardly tapered end of the spreading wedge. To reduce both the weight and the force required for operation, the casing (2) and its hand lever (3) consist of a light material from the plastic and light metal group. The casing (2) thus forms together with the rack a low-friction combination of light material and steel.

Abstract: An air filtration system for a vehicle cab has an air recirculation circuit which includes an air recirculation blower arranged in an air recirculation channel system in order to draw air from the cab interior and to blow it back into the cab interior. An air recirculation filter is arranged In the air recirculation flow. In order to reliably avoid contamination of the cab interior during filter changes, the air recirculation filter is located in a portion of an outer wall of the cab roof behind a cover. The cover covers the air recirculation channel system hermetically from the cab exterior. When the cover is opened, the air recirculation filter is accessible from the outside.

Abstract: A cleaning device for beverage drafting and dispensing systems, especially dispensing systems for carbonated beverages such as sodas, colas and fruit juices, as well as beer, utilizes primarily water and a liquid chemical cleaning agent which can be induced into the drafting lines from a storage container, and from which it can be removed again after a prescribed settling time. The system includes a hydraulically controlled change valve, controlled via three solenoid valves, pressurized with tap water and enclosed in a valve housing which contains a hydraulically movable piston which, in the operating "tapping" position, provides the first flow. Such flow is intended for the beverage. On the lower part of the valve housing, the beverage container adaptor equipped with a check valve is connected and on the upper part of the housing, a line connection is made with the beverage line leading to the tapping cock.

Abstract: There is provided a copper free dental gold alloy that contains 25 to 40% silver, 40 to 60% gold, 5 to 20% palladium, 0.05 to 0.5% iridium, 0 to 6% indium, 0 to 6% tin and 0 to 2% zinc with the proviso that at least 2% of the named non-noble metals are present, all percents are weight percents.