Patent ID: 7993360

Claim:
A rotary shaver, comprising: a rigid distal tip having a plurality of teeth positioned proximate to a distal opening for cutting tissue, an opening at a proximal end of the rigid distal tip, and a flexible shaft connection device at the proximal end; a rigid drive member having a drive attachment device at one end and a flexible shaft connection device at another end; a flexible transmission shaft coupled to the rigid distal tip at the flexible shaft connection device of the rigid distal tip and extending from the rigid distal tip to the rigid drive member, wherein the flexible transmission shaft is attached to the flexible shaft connection device of the rigid drive member; wherein at least one of the flexible shaft connection device of the rigid distal tip and of the rigid drive member comprises at least one collar protruding radially outward from an outer surface and positioned between a stop and an end of the flexible shaft connection device to attach the flexible transmission shaft; wherein the flexible transmission shaft is positioned over the at least one collar and abuts the stop; wherein the flexible transmission shaft includes an inner, smooth, tubular surface that the at least one collar contacts; at least one linear groove positioned in the outer surface and positioned generally along a longitudinal axis of one of the flexible shaft connection device of the rigid distal tip and of the rigid drive member from which the at least one collar extends; and wherein a depth of the at least one linear groove on a first side of the at least one linear groove is greater than a depth of the at least one linear groove on a second side of the at least one linear groove.