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US 9,545,711 B2Granted
Percussion mechanism
AssigneeHilti Aktiengesellschaft
InventorsAlexander Hoop, Michael Wierer, Albert Binder, Dieter Profunser, Stefan Battlogg, Juergen Poesel
Life of this patent
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Abstract
A percussion mechanism includes a first shaft and a second shaft. One or more vanes are fastened to the first shaft. The vanes are arranged so as to be rotatable in a chamber of the second shaft. The chamber is filled with a magnetorheological fluid. A magnetic field source on the second shaft generates a magnetic field that is spatially modulated in the circumferential direction inside the chamber.
Claims10
A percussion mechanism comprising:
- a first shaft, at least one vane fastened on the first shaft;
- a second shaft having a chamber, the at least one vane rotatably situated in the chamber, the chamber filled with a magnetorheological fluid;
- and
- a magnetic field source situated in the area of the second shaft, the magnetic field source, within the chamber, generating a spatially modulated magnetic field around the shaft in the circumferential direction.
1 more element
Dependencies are inferred from the claim text.