Medical drill bit
AssigneeNational Pingtung University of Science and Technology
InventorsWei-Hua Lu, Yung-Chuan Chen
Life of this patent
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Abstract
A medical drill bit comprises an accommodating slot disposed concavely on a main body of the medical drill bit, a separate board disposed in the accommodating slot to separate the accommodating slot into a first slot and a second slot, and a lid engaging with the separate board and covering the accommodating slot. The lid and the separate board do not rotate with the main body when the main body in rotation. The accommodating uses to fill with cooling liquid which able to be pumped out from the accommodating slot, and fresh cooling liquid is able to inject into the accommodating slot for cooling the drill bit in rotation.
Claims8
A medical drill bit including:
- a main body having a top portion, a ring wall and an accommodating hole disposed concavely on the top portion, wherein the accommodating slot comprises an opening on the top portion, an inner surface of the ring wall surrounds the accommodating slot and a cutting slot is disposed concavely on an outer surface of the ring wall;
- a separate board disposed in the accommodating slot to separate the accommodating slot into a first slot and a second slot communicating with the first slot, wherein the separate board comprises a head portion and a board portion connecting with the head portion, the head portion comprises a liquid inlet communicating with the first slot and comprises a liquid outlet communicating with the second slot, and a edge of the separate board does not contact with the inner surface of the ring wall;
- and
- a lid covering the opening of the accommodating slot and engaging with the separate board to seal the liquid inlet and the liquid outlet, wherein the lid and the separate board do not rotate with the main body when the main body is in rotation.
A medical drill bit including:
- a main body having a top portion, a ring wall and an accommodating hole disposed concavely on the top portion, wherein the accommodating slot comprises an opening on the top portion, an inner surface of the ring wall surrounds the accommodating slot and a cutting slot is disposed concavely on an outer surface of the ring wall;
- and
- a lid covering the opening of the accommodating slot, wherein the lid comprises a top surface, a bottom surface and a sealing ring disposed on the bottom surface, the sealing contacts with the top portion of the main body, and the lid does not rotate with the main body when the main body is in rotation.
Dependencies are inferred from the claim text.