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:
Feb. 25, 1992
Filed:
Jan. 23, 1991
Willi Haug, Freudenstadt-Musbach, DE;
fischerwerke Artur Fischer GmbH & Co. KG, Tumligen/Waldachtal, DE;
Abstract
The device for producing an undercut drilled hole includes a drilling machine, a drilling tool having a drilling head widening conically towards its front end; an adaptor connecting the drilling tool and the drilling machine so that the drilling tool rotates with the drilling machine; a sleeve fixedly connected to the drilling machine and having a circumferentially collar, the adaptor extending through the sleeve with the drilling tool protruding from the sleeve; a fixed bearing bush structured to receive the sleeve so that the sleeve is pivotable in the bearing bush, the circumferential collar including a first axial end face arranged in linear contact with a wall of the bearing bush; and a resiliently deformable element, especially a rubber ring, arranged between an annular disc member connected to the bearing bush and a second axial end face of the circumferential collar opposite to the first axial end face for axially holding the circumferential collar. The circumferential collar and the sleeve are provided with surfaces and structured, so that the drilling machine and the sleeve are pivotable by hand so that the drilling tool is pivotable to make the undercut by a gyrating or wobbling motion. A stand with a holding device which is movable toward and away from the facing panel can be provided. The holding device holds the bearing bush with the drilling machine and tool mounted in it.