Abstract: The invention relates to a spray gun comprising the following: a gun body (1); a nozzle assembly (9) arranged on said gun body (1); a compressed air supply channel (19, 20) located in the gun body (1), equipped with a valve assembly (17) for controlling the compressed air supply to the nozzle assembly (9), a regulator (6, 13) for adjusting the supply of the spray material, an actuating element (12) for actuating the valve assembly (17) and the regulator (6, 13) and a pressure measuring device (27) for detecting and displaying the pressure in the a compressed air supply channel (19, 20), The aim of the invention is to create a practical spray gun comprising a pressure measuring device which is resistant to dirt. To achieve this, the inventive pressure measuring device (27) contains a pressure sensor (28), which is integrated into the gun body (1) and which is connected to the compressed air supply channel (19, 20) via a capillary (43) located within the gun body (1).

Abstract: The invention relates to a spray pistol comprising a pistol body (1); a nozzle system (9) which is ranged on the pistol body (1); a compressed air supply channel (22, 23) which is arranged in the pistol body (1) and which comprises a valve system (17) for controlling the supply of compressed air to the nozzle system (9); a regulating device (6, 13) for regulating the supply of the substance to be sprayed; an actuating element (12) for actuating the valve system (17) and the regulating device (6, 13); a device (31, 33, 37) for regulating the supply of compressed air to the nozzle system (9); and a pressure-measuring device (35, 38, 39) for detecting and indicating the pressure in the compressed air supply channel (22, 23). The aim of the invention is to create a compact and handy spray pistol comprising a pressure-measuring device which is easy to monitor when spraying.

Abstract: The invention relates to a paint spray gun with a paint nozzle placed on a gun body, an air nozzle placed around the paint nozzle, a compressed air valve placed within a piston borehole in the gun body, a compressed air borehole running through a handgrip of the gun body to the piston borehole, and a pressure-sensing and pressure display device placed in the hand grip. For sensing and displaying the spray pressure, a tube is placed in the compressed air borehole at a distance from its inner wall. The tube forms, in the interior, a channel for the compressed air supply to a part of the piston borehole placed upstream of the compressed-air valve, and borders an intermediate space between its exterior and the inner wall of the compressed air borehole.

Abstract: The invention relates to a paint spray gun with a paint nozzle placed on a gun body, an air nozzle placed around the paint nozzle, a compressed air valve placed within a piston borehole in the gun body, a compressed air borehole running through a handgrip of the gun body to the piston borehole, and a pressure-sensing and pressure display device placed in the hand grip. For sensing and displaying the spray pressure, a tube is placed in the compressed air borehole at a distance from its inner wall. The tube forms, in the interior, a channel for the compressed air supply to a part of the piston borehole placed upstream of the compressed-air valve, and borders an intermediate space between its exterior and the inner wall of the compressed air borehole.

Abstract: This invention is directed towards a paint spray gun having a gun body with a male thread and having an air nozzle ring with a female thread which can be screwed onto the male thread of the gun body. The diameter of the thread is between about 30 and about 40 mm. The thread of the invention is a trapezoid thread with a flank angle in the range of about +/−20% of 30°. The thread has a thread height within the range of about +/− 20% of 1.1 mm, a root to crest clearance within the range of about +/−20% of 0.1 mm and a flank clearance within the range of about +/−20% of 0.15 mm. The effect of these modifications to a standard trapezoid thread with a flank angle of about 30° is that the thread is optimally adjusted to serve as a thread connecting the body of a paint spray gun and a nozzle ring.

Abstract: A nozzle structure for a paint spray gun, is comprised of a central outlet for paint, an annular slot surrounding the central outlet, the annular slot being connected inside the nozzle structure via an annular duct to a number of virtually axially parallel bores, the bores being situated on at least one circle about a central axis of the nozzle structure, apparatus for providing, compressed air via the bores for delivery to the annular duct, and an air reversing disk located inside the annular duct and opposite the bores.

Abstract: A drying nozzle is comprised of a tube for mounting on a nozzle head of a spray gun. The body contains inlet slits for ambient air entering one tube end which taper in a direction of the interior of the tube. The body expands toward the other tube end. Upon mounting the body on the nozzle head the narrowest region of the tube between the tapering region of the inlet slits and the expanding region of the tube lies directly behind an air outlet opening when seen in direction of flow of the air passing out of the air outlet opening of the nozzle head. Upon supplying compressed air in the center of the tubular body a negative pressure in the tube interior is produced and as a result of which ambient air is drawn into one tube end and passes out at the other tube end together with the compressed air.

Abstract: In order to largely prevent formation of mist in a nozzle head which is attached to a high-pressure paint spray gun, a small spigot from which the paint issues has a very small thickness of less than 0.5 mm. A circular air jet nozzle which surrounds the spigot and beyond whose outlet area the spigot projects, is provided with a depression which fans out the circular air jet. The circular air jet nozzle is surrounded by a rim of air bores which open to the same annulus as the circular air jet nozzle and which have a smaller total cross-sectional area than the area of the circular air jet nozzle and which produce a rotary air umbrella encircling the circular air jet.