Patent ID: 6494892
Filing Date: 2002-12-17
Classification: A61B,A61F

Abstract:
A surgical cutting instrument, comprising:a hollow hub having a working portion terminating at a working end and a connection portion terminating at a connection end, said connection portion defining a cavity and having a lock member projecting from an outer surface of said connection portion, an outer tubular member having a length sized for insertion into an anatomical space, said outer tubular member defining a central bore along said length of said outer tubular member, said outer tubular member having a proximal end attached to said working end of said hub and a distal end, said outer tubular member defining a cutting opening adjacent said distal end and sized to receive tissue therethrough; a cutting member slidably disposed within said central bore of said outer tubular member, said cutting member having a first operational end defining a cutting head and a second engagement end disposed proximal to said cavity of said hub; a powered hand-piece including a source of motion and an outer shell defining an outer gripping portion; a hollow hub connector having a length and a cylindrical wall with a hand-piece connection portion and a hub engagement portion, said hand-piece connection portion disposed within the hand-piece, said hub engagement portion defining a chamber for receiving said connection portion of said hub, said chamber having a longitudinal axis parallel to said length, said hub engagement portion further defining a channel through said cylindrical wall for receiving said lock member, said channel in communication with said chamber and having, a longitudinal section defined along the length of said hub connector, a second transverse section communicating with said longitudinal section at a first end and having a second opposite end, a locking recess defined in said wall perpendicularly to said transverse section and in communication with said opposite end of said transverse section, said locking recess sized to receive said lock member, whereby said connection portion of said hub is slidable within said chamber along said longitudinal axis when said lock member is disposed within said longitudinal section of said channel and said connection portion of said hub is rotatable within said chamber when said lock member is disposed within said transverse section of said channel and said connection portion of said hub fixed within said chamber when said lock member is disposed within said locking recess; anda spring element disposed on said connection portion of said hub, said spring element configured to urge said lock member into said locking recess when said lock member is rotated into said opposite end of said transverse section of said channel, said spring element having a squeezed position when said lock member is in said transverse section of said channel and a substantially at rest position when said lock members is in said locking recess, said spring element being a beam spring disposed at the connection end of said hub, said beam spring including a beam having a first surface facing said connection end and a second opposite face.