Hand operated surgical instrument having an improved tool bit connector
AssigneeCharles Buist, DMD, PA
InventorCharles Buist, SR.
Life of this patent
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Abstract
The present invention relates to a hand operated dental instrument that allows a user to manually operate tool bits that are ordinarily operated by a power operated tool or a unitary hand-held device. The invention includes a handle that carries a shaft; a bore-hole extending through at least a portion of the shaft for receiving a portion of a tool bit; and a spline receiving slot defined in the shaft. The invention also includes a tool bit having a flange that may carry a spline extending along a portion of a longitudinal axis of the tool bit so that when the tool bit is placed in the bore-hole, the spline receiving slot receives the spline so that when the shaft is rotated, the tool bit rotates.
Claims19
A hand operated instrument comprising:
- a handle;
- a shaft having an outer surface, a distal end and a proximal end wherein said proximal end is carried by said handle;
- a bore-hole defined in at least a portion of said shaft and extending from said distal end of said shaft towards said proximal end of said shaft, wherein said bore-hole is defined by at least one inner side wall;
- a spline receiving slot defined in said outer surface of said shaft and including a first side wall and a second side wall, both of which extend from said distal end of said shaft towards said handle, so that said spline receiving slot extends in a direction that is generally parallel to a longitudinal axis of said shaft;
- a tool bit having a body, a shank and a flange interconnecting said body and said shank, wherein said tool bit further includes a spline extending from a point that is adjacent to said flange and in a direction that is parallel to a longitudinal axis of said shank, said spline being adapted to be received by said spline receiving slot so that when said shank is inserted into said bore-hole and said handle is rotated, said spline engages at least one of said first side wall and said second side wall of said spline receiving slot so that rotation of said handle causes said tool bit to rotate.
A hand operated dental instrument comprising:
- a handle;
- a shaft having an outer surface, a distal end and a proximal end wherein said proximal end is carried by said handle;
- a bore-hole defined in at least a portion of said shaft and extending from said distal end of said shaft towards said proximal end of said shaft, wherein said bore-hole is defined by at least one inner side wall and is adapted to receive a first portion of a tool bit;
- an elevated stop defined in said bore-hole for engaging the first portion of the tool bit, wherein said elevated stop comprises:
- a first stop wall that extends from said at least one inner side wall of said bore-hole in a direction that is generally perpendicular to the longitudinal axis of said shaft;
- and,
- a second stop wall the extends from said first stop wall in a direction that is generally parallel to the longitudinal axis of said shaft;
- a securing ring receiving slot defined in said shaft, wherein at least a portion of said securing ring receiving slot extends through said at least one inner side wall of said bore-hole so that said securing ring receiving slot is in fluid communication with said bore-hole;
- and,
- whereby when the first portion of the tool bit is inserted into said bore-hole said elevated stop engages the first portion of the tool bit so that rotation of said handle causes the tool bit to rotate.
A hand operated instrument comprising:
- a tool bit comprising:
- a body, a shank and a flange interconnecting said body and said shank,
- wherein;
- a spline extending along at least a portion of a longitudinal axis of said shank;
- a first shank stop wall defined in said shank and extending in a direction that is generally perpendicular to the longitudinal axis of said shank;
- a second shank wall extending from said first shank stop wall to a distal end of said shank in a direction that is generally parallel to the longitudinal axis of said shank;
- a handle having a distal end and a proximal end;
- a bore-hole defined in at least a portion of said handle and extending from said distal end of said handle towards said proximal end of said handle, wherein said bore-hole is defined by at least one inner side wall;
- whereby when at least a portion of said shank is inserted into said bore-hole, at least one of said spline and said second shank wall engages said inner side wall of said bore-hole so that rotation of said handle causes said tool bit to rotate.
Dependencies are inferred from the claim text.