Dental handpiece
AssigneeJ. Morita Mfg. Corp.
InventorsTakaaki NORICHIKA, Shinji MIKAMI
Life of this patent
Estimating the term…
Abstract
A dental handpiece includes a body and a head. The body includes a supply tube configured to supply air to the head. The head includes a housing, a rotor, and a holding portion configured to rotate a cutting tool with rotation of the rotor. The housing includes: an air supply port configured to supply the air supplied from the supply tube to the inside; an air discharge port disposed on a side closer to a tip end of the cutting tool than the air supply port and configured to discharge the air from the inside; a diffuser portion configured to change a flow direction of a part of the air supplied from the air supply port so as to direct the part of the air toward the rotor; and an air-retaining portion configured to retain the part of the air supplied from the air supply port.
Claims19
A dental handpiece comprising:
- a body configured to be grasped by a user;
- and
- a head provided at a tip end of the body, wherein
- the body includes a supply tube configured to supply air to the head,
- the head includes:
- a housing,
- at least one rotor rotatable in an inside of the housing, and
- a holding portion configured to hold a cutting tool and rotate the cutting tool with rotation of the at least one rotor, and
- the housing includes:
- at least one air supply port configured to supply the air supplied from the supply tube to the inside to rotate the at least one rotor in a first direction,
- an air discharge port disposed closer to a tip end of the cutting tool than the at least one air supply port in a direction along a rotation axis of the cutting tool and configured to discharge the air from the inside,
- at least one diffuser portion configured to change a flow direction of a part of the air supplied from the at least one air supply port to direct the part of the air toward the at least one rotor in a second direction opposite to the first direction, and
- at least one air-retaining portion configured to communicate with the air discharge port and retain the part of the air supplied from the at least one air supply port.
A dental handpiece comprising:
- a body configured to be grasped by a user;
- and
- a head provided at a tip end of the body, wherein
- the body includes a supply tube configured to supply air to the head,
- the head includes:
- a housing,
- two or more rotors rotatable in an inside of the housing, and
- a holding portion configured to hold a cutting tool and rotate the cutting tool with rotation of the two or more rotors, and
- the housing includes:
- two or more air supply ports configured to supply the air supplied from the supply tube to the inside to rotate the two or more rotors in a first direction,
- an air discharge port disposed closer to a tip end of the cutting tool than the two or more air supply ports in a direction along a rotation axis of the cutting tool and configured to discharge the air from the inside,
- two or more diffuser portions configured to change a flow direction of a part of the air supplied from the two or more air supply ports to direct the part of the air toward the two or more rotors in a second direction opposite to the first direction, and
- two or more air-retaining portions configured to communicate with the air discharge port and retain the part of the air supplied from the two or more air supply ports.
A dental handpiece comprising:
- a body configured to be grasped by a user;
- and
- a head provided at a tip end of the body, wherein
- the body includes a supply tube configured to supply air to the head,
- the head includes a housing and two or more rotors rotatable in an inside of the housing,
- the housing includes:
- two or more air supply ports configured to supply the air supplied from the supply tube to the inside to rotate the two or more rotors in a first direction,
- an air discharge port disposed closer to a tip end of the body than the two or more air supply ports in a direction along a rotation axis and configured to discharge the air from the inside,
- two or more diffuser portions configured to change a flow direction of a part of the air supplied from the two or more air supply ports to direct the part of the air toward the two or more rotors in a second direction opposite to the first direction, and
- two or more air-retaining portions configured to communicate with the air discharge port and retain the part of the air supplied from the two or more air supply ports.
Dependencies are inferred from the claim text.