Patent ID: 8783509

Claim:
A powder metering method for metering of powder material from a powder material source by a metering device connected to the powder material source, the method comprising: charging the device from the powder material source with a batch of powder material in a charging configuration of the device and discharging said batch of powder material from the device in a discharging configuration of the device; connecting the powder material source with a metering piston space in the charging configuration via a first channel of a fixed metering channel hub and controlling a volume of said space between a metering piston and a peripheral surface of the fixed metering channel hub by controlling a position of the piston in said space outside the peripheral surface, thereby charging the volume with powder material by gravity; rotating the metering space around the fixed metering channel hub and thereby leaving the charging configuration and enclosing said volume filled with powder material until reaching the discharging configuration; and connecting the metering piston space with a discharge opening via a second channel of the fixed metering channel hub for discharging the batch of powder material contained in the enclosed volume.