A conveying device is provided for the conveying of coating powder and includes a powder reservoir container that includes, on the bottom, a powder outlet channel. The powder outlet channel is connected to a first powder conveyor for conveying powder out of the powder reservoir container back to a powder storage container. Moreover, a second powder conveyor is provided for conveying powder out of the powder reservoir container to a powder applicator.

The present invention concerns a pump for high-density powder transfer. The pump for high-density powder transportation according to the present invention has four-stroke operation, in which four pumping chambers in reality constitute a system of two pairs of chambers in line with each other. This makes it possible to divide the overall flow rate per minute over four tanks. Each of the four tanks has a reduced capacity, to the benefit of the compactness of the pump and the reduction of the loading/emptying times of the single tank, by exploiting the fluid-dynamic principle of communicating vessels the system of pairs of chambers in line increases the overall powder storage volume, thanks to a constant depression.

A cloud tower (11) receives microscopic particles (18) impelled by an inert gas (17) for deposition on a porous substrate (29) having vacuum (34) disposed on opposite side. To alter the size and/or shape of the deposition field without changing the entire tower structure, a pair of flaps (43, 44) are hinged (47, 48) on one side or on a pair of opposed sides of the cloud primary tower. Another embodiment places selectable tower inserts (36, 38) within the primary tower structure, fitting therein and sealing thereto.

A powder-dispensing device in the form of a dense-phase powder pump or of a powder injector is provided to deliver coating powder from a powder reservoir to a powder-spraying device. To make the spray coating operation easier for the customer and to be able to make it more cost-effective, without having to compromise on good coating quality and good coating efficiency, a control device is integrated in the powder-dispensing device or is connected, in particular directly, to the powder-dispensing device and is designed to establish at least one parameter that is characteristic of a spray coating procedure carried out with the powder-coating device.

A powder conveying device for the conveying of coating powder to a powder applicator includes a working container that is designed and operable appropriately such that it can be pressurized. The working container further includes a powder inlet and a powder outlet, whereby the powder outlet is connected to a powder outlet valve. In addition, a powder conduit is provided that is connected, on the inlet side, to the powder outlet valve and includes, on the inlet side, an inlet for transport air. The powder conduit can be connected, on the outlet side, to a powder applicator. Moreover, a control is provided that is designed and operable appropriately such that it controls the amount of powder to be conveyed by repeatedly opening and closing the powder outlet valve.

A sprayer system includes a diluent tank, a mounting bracket mounted to the diluent tank and a concentrate tank mounted to the mounting bracket and diluent tank. A mixing manifold is mounted to the mounting bracket and has a first inlet fitting to receive a fixed amount of diluent and a second inlet to receive a liquid concentrate. The diluent and concentrate are then combined to form a mixed solution. The mixing manifold includes an outlet. A positive displacement pump is mounted to the mounting bracket and has a suction port fluidly coupled to the mixed solution outlet. A pressure port may fluidly couple with a spray device. The second tank may be separable from the first tank and mounting bracket without requiring removal of the mixing manifold or positive displacement pump.

An active surge chamber for use in a paint supply system comprising a paint channel, a fluid chamber connected to a pressurised fluid supply, a diaphragm, a spring, and means responsive to movement of the diaphragm for effecting connection and disconnection of the pressurised fluid supply to the fluid chamber and for relieving pressure of fluid in the chamber. The paint channel is sealingly separated from the fluid chamber by the diaphragm. The spring has a spring rate such that the force exerted on the diaphragm by the spring restricts movement of the diaphragm over a selected range of pump outlet pressures in order to attenuate the movement of the diaphragm and reduce the susceptibility of the system to unwanted oscillation. Pressure fluctuations in a paint flow induced by usage of a reciprocating pump upstream of the active surge chamber are minimised.

A device and method for transferring solid particles between zones of different ambient conditions is disclosed. A piston chamber comprising a solids inlet, a solids outlet, and a piston is provided. The solids inlet is adjacent to a source of solid particles, the source being at a first ambient condition. The solids outlet is adjacent to a solids receptacle, the solids receptacle being at a second ambient condition. The piston comprises a hollow. The piston traverses back and forth across the piston chamber such that the hollow is moved alternately adjacent to the solids inlet and the solids outlet. The solid particles pass into the hollow as the hollow is adjacent to the solids inlet, and pass out of the hollow as the hollow is adjacent to the solids outlet.

A method and a dense phase powder pump for conveying coating powder from a first powder reservoir to a second downstream powder reservoir or to a downstream powder spray-coating gun or the like installation for spraying coating powder are disclosed. In order to reduce the number of components of the dense phase powder pump that require maintenance, the dense phase powder pump is designed as a single-chamber dense phase powder pump and has only a single powder conveyor chamber for conveying coating powder.

A powder conveying chamber for a dense-phase powder pump for conveying powder, in particular coating powder, has an end region via which the powder conveying chamber is or can be fluidically connected to a powder line, wherein the end region of the powder conveying chamber is configured as a transition region and designed to reduce an effective flow cross-section of the powder conveying chamber to an effective flow cross-section of the powder line and/or to an effective flow cross-section of a valve arranged between the powder conveying chamber and the powder line, in particular a pinch valve. In particular, a cleaning system is associated with the end region, with which the end region can be supplied with cleaning air in the form of pressurized air, in order to keep the end region free of powder deposits or in order to remove powder deposits in the end region.