Dental machining device and method for monitoring sealing elements in dental machining devices
AssigneeSirona Dental Systems GmbH
InventorThomas Hasenzahl
Life of this patent
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Abstract
A dental machining device (1) having at least one shaft (2) which projects into a machining chamber (4) and is displaceable in both axial and radial directions includes a sealing element (7) having at least two axially spaced sealing lips (8, 9) bearing against the shaft (2) in its peripheral direction and enclosing an annular chamber (10) with the shaft (2). At least one fluid conduit (11) opens into the annular chamber (10) to supply a fluid (16) thereto. A pressure sensor (14) is provided for detecting a state variable of the fluid, which is detected and held ready for transmission to a control unit (14″).
Claims12
A dental machining device comprising at least one shaft which projects into a machining chamber and is displaceable in both axial and radial directions, and a sealing element for sealing said shaft, wherein said sealing element comprises:
- at least two axially consecutively spaced sealing lips bearing against said shaft in a peripheral direction and enclosing an annular chamber with said shaft,
- at least one fluid conduit opening into said annular chamber to supply a fluid thereto, and
- means for detecting a state variable of said fluid.
Dependencies are inferred from the claim text.