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:
Jun. 05, 2018
Filed:
May. 29, 2013
Hilti Aktiengesellschaft, Schaan, LI;
Dario Bralla, Buchs, CH;
Hilti Aktiengesellschaft, Schaan, LI;
Abstract
A machine tool and control method are disclosed. The machine tool has a tool receptacle which supports a chiseling tool so that it is movable along an axis of movement. A magneto-pneumatic striking mechanism has a primary drive, which is arranged around the axis of movement, and has a first magnetic coil and a second magnetic coil. On the axis of movement within the magnetic coils, the striking mechanism has a striker and riveting head. Furthermore, the striking mechanism has a pneumatic spring which acts on the striker. The control method provides for a pressure sensor which measures the prevailing pressure in the pneumatic spring during a movement of the striker in the direction opposite the striking direction. A controller initiates an acceleration phase at the start of a drop in pressure in the pneumatic spring. The primary drive accelerates the striker in the striking direction during the acceleration phase.