The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 18, 2006
Filed:
Dec. 03, 2001
Frank Filser, Oberengstringen, CH;
Ludwig Gauckler, Schaffhausen, CH;
Peter Kocher, Wallisellen, CH;
Heinz Luethy, Neuchâtel, CH;
Peter Schaerer, Zurich, CH;
Heiner Hoerhold, Budingen, DE;
Peter Kreuder, Bad Nauheim, DE;
Stefan Fecher, Johannesberg, DE;
Frank Filser, Oberengstringen, CH;
Ludwig Gauckler, Schaffhausen, CH;
Peter Kocher, Wallisellen, CH;
Heinz Luethy, Neuchâtel, CH;
Peter Schaerer, Zurich, CH;
Heiner Hoerhold, Budingen, DE;
Peter Kreuder, Bad Nauheim, DE;
Stefan Fecher, Johannesberg, DE;
Abstract
A holding device comprises a cylindrical or prismatic, porous ceramic blank and elements for clamping in a machine tool for processing the blank by removing material, in order to produce a ceramic workpiece. A narrow frame is fixed by an adhesive connection over at least part of the periphery of the blank, which is held without stresses, in the area of a plane encompassing the longitudinal middle axis (A) of the blank. The frame only covers a small part of the surface of the blank and can be detached and held in a stable holder with a clamping adapter, in such a way that it cannot slide. The entire combination is fixed in the machine tool in such a way as to be resistant to twisting and sliding. The ceramic workpiece emerges continuously form the ceramic blank without predetermination of the advance direction, until holding segments which can then only be freely selected according to number and location have been formed. The holding segments end on the residual material of the blank in the area of the frame or on the frame itself. The holding device is used especially as a workpiece for producing fully ceramic dental prostheses, particularly crowns or bridges.