Patent ID: 6951314

Claim:
A device for grinding granular material, comprising: a housing having first and second ends, and a chamber opening to the first and second ends of the housing for storing granular material therebetween, a grinding mechanism closing the first end of the housing and a drive member extending toward the second end of the housing; a cap to close the chamber at the second end of the housing; and a releasable interlocking arrangement that mates with the second end of the housing, comprising: a first cylindrical collar including a cylindrical skirt having an outwardly extending rim, and an inwardly extending rim, a second cylindrical collar having an upwardly extending cylindrical skirt, an intermediate external flange and a lower cylindrical skirt having three castellated slots spaced around the circumference thereof; a flexible ring shaped member having three feet extending downwardly and outwardly therefrom to fit in the castellated slots in the lower cylindrical skirt; and a disc shaped plug member having three longitudinally extending slots spaced equally around the circumference thereof, each slot having a flange extending therefrom, the disc shaped plug member having an opening extending longitudinally through a central portion of the plug, the longitudinally extending slots receiving the feet of the flexible ring shaped member.