Devices for dispensing solid powder or pellets

A device for solid material dispensing, comprising:

• a drive rod (2) linearly movable along, and rotationally movable around, an axis direction (12);
• wherein the drive rod is linearly movable to a first linear position at which the drive rod is in physical contact with an axis limit plate (1) and to a second linear position at which the drive rod is not in physical contact with the axis limit plate, along the axis direction around which the drive rod is rotationally movable;
• wherein an upper portion of the drive rod goes through, and stays above, an opening of the axial limit plate in a non-dispensing operational mode;
• wherein, in a dispensing operational mode, a downward force is exerted on the drive rod by an external drive shaft of a motor operationally coupled with the upper portion of the drive rod to cause the drive rod to be displaced downward along the axis direction and to be physically disengaged from the axial limit plate;
• a central rod (5) attached to the drive rod and drivable by the drive rod to rotate around the axis direction with the drive rod;
• a solid material container (10) having one or more compartments to store solid materials to be dispensed;
• a surface material remover (9) attached to the central rod and movable relative to one or more first interior surfaces of the one or more compartments of the solid material container in the dispensing operational mode, wherein the surface material remover is in a shape of a rectangle;
• a switch valve (6) rigidly attached to the central rod and drivable by the central rod to rotate around the axis direction with the central rod;
• wherein a container bottom (19) of the solid material container comprises one or more first component shapes (57) that form one or more first interstitial void spaces (58);
• wherein the switch valve comprises one or more second component shapes (54) that form one or more second interstitial void spaces (55);
• wherein the one or more second component shapes of the switch valve form a closure with the one or more first component shapes of the container bottom of the solid material container to prevent any of the solid material from being dispensed from the solid material container while the switch valve is positioned at one or more first rotational positions;
• wherein the one or more second interstitial void spaces form one or more dispensing channels with the one or more first interstitial void spaces to allow one or more units of the solid material to be dispensed from the solid material container to one or more outside receptacles while the switch valve is rotationally positioned differently from the one or more first rotational positions.