Disposable hub for a surgical cutting instrument

摘要

A surgical cutting instrument includes a hollow hub 15 that has a working portion 16 which terminates at a working end 17 and a connection portion 18 which terminates at a connection end. The connection portion 18 defines a cavity 20 and a lock member 22, which projects from an outer surface 21 of the connection portion 18. A surgical cutting element extends from the working end 17 and is operationally connected to a source of motion. A hollow hub connector 60 has a cylindrical wall 61 with a hand-piece connection portion 62 and a hub engagement portion 65. The hub engagement portion defines a chamber 70 for receiving the connection portion 18 of the hub 15. The chamber 70 has a longitudinal axis A1 parallel to the length of the hub connector 60. The hub engagement portion 65 further defines a channel 75 through the cylindrical wall 61 for receiving the lock member 22. The channel is in communication with the chamber 70 and has a longitudinal section 76 defined along the length L of the connector. The channel also has a second transverse section 77 communicating with the longitudinal section 76 at a first end 78 and having a second opposite end 79. Further, the channel has a locking recess 81 defined in the wall 62 perpendicularly to the transverse section 77 and in communication with the opposite end 79 of the transverse section 77. The locking recess 81 is sized to receive the lock member 22. A spring element 100 urges the lock member 22 into the locking recess 81 when the locking member 22 is rotated into the opposite end 79 of the transverse section 77 of the channel 75.