US Patent 11779057 Herb grinder

An herb grinder comprising a receptacle grinding for receiving herbs and an insertable grinding member for being inserted into the receptacle grinding member. The receptacle grinding member comprises a receptacle grinding surface and a peripheral wall structure circumscribing the receptacle grinding surface. The insertable grinding member comprises an insertable grinding surface for rotatably interfacing with the receptacle grinding surface. The grinding surfaces comprise define a respective plurality of elongate grooves forming a respective contiguous protruding structure therebetween. Impartment of a mutual rotational movement of the insertable member within the receptacle grinding member provides for grinding herbs between the interfacing grinding surfaces by the grinding action of the respective contiguous protruding structures thereof.