Kopperschmidt-mueller Gmbh & Co. Kg

Wolfgang Kuhn

Karl Rapp

Karsten Juterbock

Norbert Lauter

Norbert Buchholz

A spray gun or fuel nozzle wherein the underside of the pistol grip handle is formed with a socket for a rotary insert which is connected to two or more supply conduits for flowable materials. The insert has passages which convey flowable materials from the respective conduits to discrete channels in or on the housing of the gun or nozzle. One of the passages can extend from the respective conduit to the inner end face of the insert to admit flowable material into a channel of the handle, and one or more passages can extend from the respective conduit or conduits to annular spaces which are provided in the peripheral surface of the insert and/or in the adjacent internal surface of the handle and each of which communicates with a discrete channel. At least one channel can be provided in a guard in front of the trigger which is actuatable by the hand holding the handle. The insert is rotatably installed directly in the handle or in a cupped receptacle which is non-rotatably but separably installed in the handle.

Apparatus for simultaneously discharging a plurality of fluids

The nozzle assembly of an electrostatic spray gun has an adapter which is made of an electrically insulating material and has a front surface facing in the direction of propagation of material issuing from the orifice of the nozzle. The adapter has a frustoconical extension which surrounds the orifice and whose external surface defines with the front surface of the adapter an annular space for the tips of electrodes which ionize air flowing toward the spray of material that issues from the orifice. The locations of the tips of electrodes (preferably very close to the front surface of the adapter) and the inclination of the external surface of the frustoconical extension determine the location of contact of ionized air with the spray. The tips of the electrodes are shielded from mechanical damage by being located in the annular space.

Nozzle assembly for spray guns

Apparatus for simultaneously pumping two or more different liquids to a spraying device has a pair of discrete diaphragm pumps for each liquid. The pumps of each pair are connected in parallel and operate alternatingly so that one pump delivers a metered quantity of liquid while the pumping chamber of the other pump receives a metered quantity of the same liquid and vice versa. The capacities of pumps of at least one pair are adjustable in a simultaneous operation, and all pumps are operated by a common prime mover.

Apparatus for simultaneously pumping a plurality of liquids

An electrostatic spray gun wherein the barrel is formed by two tubes which define an annular gap for gaseous or pulverulent material. An electrode is installed in the inner tube between the front and rear ends of such tube and has two or more prongs extending outwardly into the gap. The central portion of the electrode has one or more discharging portions in a path for the flow of pulverulent or gaseous material toward a deflector which is releasably mounted at the front end of the inner tube. The electrode is connected with a high-voltage conductor which is mounted in a tubular shield within the inner tube.

Electrostatic spray gun

A portable electrostatic spray gun for liquid and/or pulverulent materials has a body with a grip and a second portion which carries a detachable barrel and has an inlet for admission of material to be sprayed. The rear side of the grip has a socket for a first unit of the high-voltage generator. A second unit of the generator is installed in a chamber provided in the second portion of the body and being accessible upon separation of the second portion from the grip. The grip contains a proximity switch which is actuatable by the trigger and can be deactivated by rotating it in the grip. The first unit of the generator has a transformer and an oscillator connected to a low-voltage input, and the second unit has a voltage multiplier connected with two high-voltage electrodes, one in the inlet and the other in an air admitting channel which is provided in the second portion of the body and includes a passage in the second unit of the generator.

Growing community of inventors

Schloss Holte-Stukenbrock, Germany

Wolfgang Kuhn