Tool driving or impacting – Processes
Reexamination Certificate
2011-04-19
2011-04-19
Rada, Rinaldi I (Department: 3721)
Tool driving or impacting
Processes
C173S201000, C173S212000
Reexamination Certificate
active
07926584
ABSTRACT:
A hand-held power tool (1) includes a linear motor (2) having a rotor (3) which is movable along a percussion axis (A) in an axially limited manner between two reversal points (W) and which can be driven by the striking piston (5) of the power tool with the intermediary of an air spring (4), sensors designed for determining the actual state of the rotor (3) and connected to a computer (9) connected via power electronics (33) to at least one field coil (10) of the linear motor (2), with the rotor (3) being displaced against a contact element (11a,11b) at least at one reversal point (W) and being pressed against the contact element electromagnetically; and a control process for the hand-held power tool.
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patent: 5497555 (1996-03-01), Averbuch
patent: 6215206 (2001-04-01), Chitayat
patent: 6663348 (2003-12-01), Schwarz et al.
patent: 7025183 (2006-04-01), Steffen et al.
patent: 2004/0065455 (2004-04-01), Berger et al.
patent: 2008/0252150 (2008-10-01), Grunde
patent: 1396812 (1975-06-01), None
patent: WO 2007/000 344 (2007-01-01), None
Binder Albert
John Alexander
Sander Bernhard
Abelman ,Frayne & Schwab
Chukwurah Nathaniel
Hilti Aktiengesellschaft
Rada Rinaldi I
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