Patent ID: 11787119

Abstract:
There is provided a powder feeder (10, 10′) comprising a main chamber (12, 12′) with a gas inlet (14, 14′) and a powder outlet (16), at least one secondary chamber (20, 20′) configured to receive powder and a shaver element (22, 40, 50), wherein the shaver element (22, 40, 50) is positioned directly above an opening (26, 26′) in the at least one secondary chamber (20, 20′). The secondary chamber (20, 20′) further comprises a piston (28, 28′) movable towards the shaver element (22, 40, 50) so as to urge powder upwards. Examples of a shaver element include a rotatable screw (22), a conveyor belt (40) and a rotating disc (50) with protrusions (54).