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US 12,588,968 B2Granted
Dental handpeice
OwnerKazuyoshi Suzukiinventor
Life of this patent
Estimating the term…
Abstract
Provided is an air turbine type dental handpiece capable of reducing a generated sound volume. An air turbine 2 is rotationally driven by compressed air that is supplied to the internal space of a housing 11, and the treatment such as cutting of the tooth of a patient is performed by a cutting tool 4. A blade 22 is a toroidal type blade (a blade having a shape in which a first blade portion 221 and a second blade portion 222 are continuous with each other at a bridge portion 224). Therefore, the generation of a large eddy current around the air turbine 2 is suppressed, and the generated sound volume is reduced.
Claims4
A dental handpiece comprising:
- a housing;
- an air turbine built in the housing and configured to rotate a cutting tool for cutting a tooth;
- a handle-side housing attached to the housing and provided with an air supply passage and an exhaust passage for the air turbine,
- wherein a blade of the air turbine is configured by toroidal blades,
- the air supply passage is connected to the housing such that compressed air is introduced above the blade of the air turbine inside the housing, and
- the exhaust passage is connected to the housing such that the compressed air is led out from below the blade of the air turbine inside the housing.
3 more elements
Dependencies are inferred from the claim text.