Resecting tool with independent variable axial extension for tool implements and guide sleeves

A surgical resecting tool for cutting bone that is adapted to be driven by a motor for rotating a tool implement having a shaft and a tool head on one end of the shaft, comprising:

• a generally tubular base having a longitudinal axis and adapted to be attached to the motor;
• a drive chuck located inside the base for coaxial rotation relative thereto and adapted to be coupled to and rotationally driven by the motor;
• an implement collet mounted to the chuck and having an axial opening and a tapered exterior, the implement collet being radially expansible and contractible about the opening for closely receiving the shaft of a tool implement;
• a collet receiver having a tapered inner surface that slidingly engages the tapered exterior of the implement collet;
• a guide sleeve for closely receiving the tool implement;
• a guide sleeve collet located inside the front end of the base and having an open end that is adapted to closely receive the guide sleeve the guide sleeve, collet being radially expansible and contractible to selectively retain the guide sleeve;
• a collar located between the linkage and the collet receiver for axially moving the collet receiver in response to rotation of the sleeve;
• and wherein
• an amount of axial extension of a tool head of the implement from the resecting tool may be selected by a user by axially repositioning the shaft of the implement within the implement collet.

A surgical resecting tool for cutting bone that is adapted to be driven by a motor for rotating a tool implement having a shaft and a tool head on one end of the shaft, comprising:

• a generally tubular base having a longitudinal axis, a front end with an interior surface that is tapered, and a rear end that is adapted to be attached to the motor;
• a drive chuck coaxially mounted in the base and having a first end that is adapted to be coupled to and rotationally driven by the motor and a second end for closely receiving the shaft of the implement;
• an implement actuation mechanism mounted to the base and having an external, manually engagable portion that is movable between locked and unlocked positions for moving the second end of the drive chuck into and out of frictional engagement, respectively, with the shaft of the implement;
• a guide sleeve for closely receiving the tool implement;
• a collet nut rotatably mounted to the front end of the base and having an internal, circumferentially-extending rib;
• a guide sleeve collet located inside the front end of the base and the collet nut, the guide sleeve collet having a serpentine cut, an external taper for sliding engagement with the tapered interior surface of the base, an external annular recess for engaging the rib on the collet nut to prevent axial movement therebetween, and an open end for closely receiving the guide sleeve, the guide sleeve collet being radially expansible and contractible along its taper in response to axial movement of the collet nut relative to the base;
• and wherein
• an amount of axial extension of a tool head of the implement from the resecting tool may be selected by a user by axially repositioning the shaft of the implement within the second end of the chuck;
• and wherein
• an amount of axial extension of the guide sleeve from the resecting tool may be selected by the user, independently of the axial extension of the implement, by axially repositioning the guide sleeve within the guide sleeve collet.

A method for varying the amount of axial extension of a tool implement and a guide sleeve from a surgical resecting tool, comprising:

• (a) providing a resecting tool with a mounting end, an opening on an opposite end, a guide sleeve actuation member, an implement actuation mechanism, and an internally rotatable chuck with a motor end and an implement end located opposite the motor end;
• (b) attaching the mounting end of the resecting tool to a motor such that the motor end of the chuck couples to and rotationally engages the motor;
• (c) moving the guide sleeve actuation member to an open position;
• (d) inserting a guide sleeve into the opening in the resecting tool;
• (e) selecting a desired length of axial extension of the guide sleeve from the opposite end of the resecting tool by axially moving the guide sleeve relative to the guide sleeve actuation member;
• (f) moving the guide sleeve actuation member to a closed position to prevent the guide sleeve from moving relative to the resecting tool;
• (g) moving the implement actuation mechanism to an unlocked position;
• (h) inserting a shaft of the tool implement into the guide sleeve and the opening in the resecting tool;
• (i) selecting a desired length of axial extension of the implement from the opposite end of the resecting tool and the guide sleeve by axially moving the shaft of the implement relative to the implement end of the chuck;
• and
• (j) moving the implement actuation mechanism to a locked position to prevent relative axial and rotational motion between the implement and the chuck.

A surgical resecting tool for cutting bone, comprising:

• a generally tubular base;
• a drive chuck for rotatably driving a tool implement, the drive chuck located within the base for coaxial rotation relative thereto;
• a guide sleeve for closely receiving a tool implement;
• and
• a guide sleeve collet located inside the front end of the base, the guide sleeve collet having an open end that is adapted to closely receive the guide sleeve and being radially expansible and contractible so that an amount of axial extension of the guide sleeve from the resecting tool may be selected by a user.