Bone harvesting device
View Patent ↗A bone harvesting device is disclosed as including a drill body for drilling into bone, the drill body being rotatable about its central longitudinal axis, and a saw pivotable relative to the drill body about a pivoting axis parallel to the central longitudinal axis of the drill body, the drill body including a cavity which opens at a lower open longitudinal end of the drill body, and the saw being pivotable relative to the drill body between a first position in which the saw is clear of the lower open longitudinal end of the drill body and a second position in which the saw blocks part of the lower open longitudinal end of the drill body.
1. A bone harvesting device including:
a drill for drilling into bone, said drill being a cylinder having a forward edge at an end thereof, the drill being rotatable about its longitudinal axis, for making a longitudinal circular cut into the bone for forming a cylindrical drilled bone portion as the drill is advanced into the bone, the drill having a cavity for receiving the drilled bone portion therein, the cavity having an opening at the forward end of the drill through which the cylindrical drilled bone portion passes into the cavity,
a cutter disposed in proximity to the opening which is pivotable relative to said drill about a pivoting axis which is substantially parallel to said longitudinal axis of said drill
wherein said cutter is pivotable relative to said drill between a first position in which said cutter is clear of said opening to permit the drilled bone portion to pass through the opening into the cavity and a second position in which said cutter blocks at least part of said opening to hold the drilled bone portion in the cavity, and
wherein, during movement of said cutter between said first position and said second position, said cutter moves across a plane which is substantially perpendicular to said pivoting axis, thereby cutting through and detaching the drilled bone portion from the bone, for removal with the drill.
2. A device according to claim 1 wherein said pivoting axis is fixed relative to said drill.
3. A device according to claim 1 further including an actuator for moving said cutter between the first position and the second position.
4. A device according to claim 3 wherein said actuator is movable relative to said drill between a first locking position and a second locking position, wherein when said actuator is in said first locking position, said cutter is in said first position and relative movement between said cutter and said drill is prevented, and wherein when said actuator is in said second locking position, said cutter is in said second position and relative movement between said cutter and said drill is prevented.
5. A device according to claim 4 wherein said actuator is rotatable relative to said drill about said longitudinal axis of said drill between said first locking position and said second locking position.
6. A device according to claim 4 wherein, during movement of said actuator relative to said drill from said first locking position to said second locking position, said cutter is adapted to move from said first position to said second position.
7. A device according to claim 4 wherein said actuator is movable relative to said drill between either of said first and second locking positions and an unlocked position in which movement of said actuator between said first and second locking positions is allowed.
8. A device according to claim 7 wherein said actuator is movable relative to said drill axially between either of said locking positions and said unlocked position.
9. A device according to claim 7 further including at least one spring for biasing said actuator towards either of said locking positions.
10. A device according to claim 9 wherein said actuator is connected with said drill via the at least one spring.
11. A device according to claim 1 wherein said cutter is fixedly engaged with a gear member for simultaneous rotational movement about said pivoting axis, wherein said gear member is in mesh with teeth of said actuator, and wherein upon rotation of said actuator about said longitudinal axis of said drill, said gear member is adapted to rotate relative to said drill about said pivoting axis.
12. A device according to claim 1 wherein said cavity of said drill is adapted to receive a block of bone harvested by said device.
13. A device according to claim 1 wherein said cutter includes at least one saw member.
14. A device according to claim 13 wherein said cutter includes a plurality of saw members.
15. A device according to claim 1 further comprising a bone biasing spring for biasing a block of bone received within said cavity away from said cavity.
16. A device according to claim 15 wherein said bone biasing spring extends at least in part into said cavity.