US 12,115,635 B2
Control method for a percussive hand-held power tool
Markus Hartmann, Mauerstetten (DE); Franz Moessnang, Stadtbergen (DE); Laurent-Sebastian Kock, Poing (DE); Philipp Lorenz, Munich (DE); and Eduard Pfeiffer, Halblech (DE)
Assigned to Hilti Aktiengesellschaft, Schaan (LI)
Appl. No. 16/469,008
Filed by Hilti Aktiengesellschaft, Schaan (LI)
PCT Filed Dec. 6, 2017, PCT No. PCT/EP2017/081634
§ 371(c)(1), (2) Date Jun. 12, 2019,
PCT Pub. No. WO2018/108658, PCT Pub. Date Jun. 21, 2018.
Claims priority of application No. 16203920 (EP), filed on Dec. 14, 2016.
Prior Publication US 2019/0314970 A1, Oct. 17, 2019
Int. Cl. B25D 11/06 (2006.01)
CPC B25D 11/06 (2013.01) [B25D 2216/0015 (2013.01); B25D 2250/221 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A control method for a percussive hand-held power tool comprising the following steps:
detecting a switching state of an operating button;
detecting a temperature using a temperature sensor;
activating an electropneumatic striking mechanism in response to an actuation of the operating button, an exciter of the electropneumatic striking mechanism being moved forward and backward along a working axis at a repetition rate, a striker coupled to the exciter via a pneumatic chamber also being moved; and
if the temperature is greater than a limiting temperature, the repetition rate is continuously increased from idle up to a setpoint value of the repetition rate, a number of cycles of the exciter until reaching the setpoint value being shorter than 10 cycles, and if the temperature is less than the limiting temperature, the number of cycles of the exciter from idle until reaching the setpoint value is greater than 200 cycles.