Patent ID: 8205816

Claim:
A single-handled vertical solid material grinder comprising, a shell that has a material inlet and an outlet, which has a material chamber that contains the solid material particles and is connected to the inlet, a handle set with a motion handle and a mounted handle, the upper part of the motion handle and the mounted handle stretches outside the shell, the lower part of the mounted handle is mounted inside the shell, the lower part of the motion handle has a driving axis that is mounted inside the shell, the said motion handle can move back and forth around the said driving axis, between the said motion handle and the shell there is a elastic repositioning unit that pushes the motion handle away from the mounted handle; a grinding set that includes a sector unit with a sector surface inside the shell and a grinding unit that is placed outside the sector surface, wherein there are multiple parallel teeth on the said sector surface, wherein there is a spinning axis mounted inside the shell at a sector unit's spinning center, and is vertical to the plane of the motion handle and the mounted handle, wherein there is at least on fixed teeth on the said grinding unit that matches the said parallel teeth, the motion handle and the sector unit is a driving set that will driving the sector unit move back and forth around the spinning axis; wherein there is an aperture leading from the material chamber to the fixed teeth of the grinding unit above the grinding unit in the said shell, wherein there is an outlet beneath the fixed teeth on the grinding unit in the shell, wherein said sector unit's spinning axis and the motion handle's driving axis overlap each other, and wherein said sector unit fits into the motion handle via the driving set.