Blank holder for a dental milling machine
Assigneevhf camfacture Aktiengesellschaft
InventorMatthias Schumacher
Life of this patent
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Abstract
The invention relates to a blank holder for a dental milling machine. The blank holder has a clamping frame with a receptacle for a blank. The clamping frame includes a first frame part and a second frame part which are pivotable relative to one another to open the receptacle. A first clamping face is formed on the first frame part and a second clamping face is formed on the second frame part. The clamping faces engage an outer periphery of the blank with the clamping frame closed. To configure a blank holder so that the blank is fixed in the clamping frame in a play-free manner, provision is made to form one of the clamping faces on an annular clamping ring. The clamping ring is held on a frame part and is displaceable counter to a force in the axial direction.
Claims19
A blank holder for a dental milling machine, wherein a blank held by the blank holder has an outer edge defining a peripheral length, the blank holder comprising:
- a clamping frame having a receptacle for receiving the blank and said receptacle defining an axial direction;
- said clamping frame including a first frame component and a second frame component mounted so as to be pivotable relative to each other for opening said receptacle;
- said clamping frame having a lateral edge;
- said second frame component being pivotally connected to said first frame component in the region of said lateral edge to permit opening said receptacle;
- said first and second frame components having first and second clamping surfaces, respectively, for contact engaging said outer edge of said blank along all of said peripheral length thereof when said clamping frame is closed;
- a clamping ring held on one of said first and second frame components;
- one of said first and second clamping surfaces being formed on said clamping ring;
- said clamping ring having a height (r) measured in said axial direction;
- a positioning force device for applying a positioning force to said clamping ring;
- and,
- said clamping ring being mounted in said one of said first and second frame components so as to permit the entire clamping ring to be displaceable in said axial direction against the force applied by said positioning force device.
Dependencies are inferred from the claim text.