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US 4,690,226 AGranted
Hammer drill
AssigneeMetabowerke GmbH
InventorsAlbrecht Schnizler, Manfred Schulz, Klaus Bartmann
Life of this patent
Estimating the term…
Abstract
A hammer drill has clamping jaws which are provided, in addition to clamping surfaces for radial clamping a cylindrical tool shaft, also with additional axially extending guiding surfaces for axially non-rotatably holding and guiding of the tool shaft, and the tool shaft is provided with guiding grooves associated with the clamping jaws.
Claims6
A tool for a hammer drill comprising a tool shaft having a profiled cross-section;
- and an adapter sleeve axially displaceable on said tool shaft and having an inner cross-section corresponding to said profiled cross-section of said tool shaft and also having a cylindrical outer surface, said outer cylindrical surface being fixedly clampable by clamping surfaces of clamping jaws, said profiled cross-section of said tool shaft having at least guiding grooves, said adapter sleeve having inwardly extending guiding surfaces cooperating with said guiding grooves, said tool shaft having two abutments, said adapter sleeve being arranged to be displaceable between said two abutments of said tool shaft.
Dependencies are inferred from the claim text.