Abstract: A dusting gun for removal of dirt and for cleaning purposes, where dirt, dust, oil and other loose or firmly sticking coats are removed with compressed air. The dusting gun comprises an oscillating pressure discharge valve which causes splitting up of the air flow into periodically repeated pressure discharges. The oscillating valve acts automatically under the influence of the static and dynamic pressures of the compressed air and is designed to oscillate with a frequency in the range of 2-50 Hz. The oscillating valve is connected to a nozzle by an elongated air duct.

Abstract: An apparatus for mounting and dismounting of tires based on the principle of a wedge-shaped tire lever forced in between the wheel rim and bead wire of the tire in order to force the bead wire inside or outside the rim by a relative movement along the edge of the rim, has a double set of tire levers (5) which by the use of associated rim gripping or damping devices (6, 7) on the ends of pivoted arms which are pivoted outwardly and inwardly by a main piston cylinder and linkage advance stepwise along the rim edge (K) by alternate activation of the rim clamps, the distance between the two tire levers being increased and reduced forcibly at the same time so that the tire levers work on the entire wheel rim circumference. The apparatus is operated by compressed air and a manually operated directional valve controls the working rate. The apparatus is mobile and can be carried and operated by a single person and requires no adjustment.