Patent ID: 6948671

Claim:
A pepper grinder, comprising a housing, the housing having a holding room, and a holed transverse support plate above the holding room; a grinding mechanism including both an outer wheel securely positioned in a lower end of the holding room of the housing and an angularly displaceable inner wheel positioned within the outer wheel; a rotary sleeve positioned above the grinding mechanism and supported on the transverse plate of the housing; the inner wheel being connected with a shaft joined to the rotary sleeve so as to be angularly displaceable together with the rotary sleeve; the rotary sleeve having a plurality of spaced spiral-curved guiding grooves on a cylindrical surface thereof, and upright guiding grooves spaced between the spiral-curved guiding grooves; each upright guiding groove being connected to two adjacent spiral-curved guiding grooves at upper and lower ends thereof; and a depressed sleeve positioned above the rotary sleeve for effecting angular displacement of the rotary sleeve; the depressed sleeve having a plurality of protrusions on an inner side; the depressed sleeve being biased upwards by a spring such that when it is not being depressed, it is fitted over an upper end portion of the rotary sleeve, and the protrusions are fitted in upper ends of corresponding spiral-curved guiding grooves; thus allowing the inner wheel to be turned in single direction relative to the outer wheel to crush pepper corns between the wheels when the depressed sleeve is moved up and down repeatedly.