EP 2527091 A3 20160914 - Screwdriver and method for controlling a screwdriver
Title (en)
Screwdriver and method for controlling a screwdriver
Title (de)
Schrauber und Verfahren zum Steuern eines Schraubers
Title (fr)
Tournevis et procédé de commande d'un tournevis
Publication
Application
Priority
DE 102011102275 A 20110523
Abstract (en)
[origin: EP2527091A2] The screw driver has a drive (12) including electric motor (14) connected to drive shaft (20) for driving a tool (22), and current sensor (38) to detect motor current. A control unit (36) calculates threshold value for motor current by transferring the electric motor to waiting state, based on preset torque. The motor current is monitored, and the brake criterion is determined based on preset torque, when monitored motor current exceeds threshold value. The drive is decelerated when brake criterion is satisfied and the motor is not energized during brake operation of drive. An independent claim is included for a method for controlling screw driver.
IPC 8 full level
B25B 21/00 (2006.01); B25B 23/147 (2006.01)
CPC (source: EP)
B25B 21/00 (2013.01); B25B 23/147 (2013.01)
Citation (search report)
[A] DE 102004021930 A1 20051201 - BOSCH GMBH ROBERT [DE]
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
EP 2527091 A2 20121128; EP 2527091 A3 20160914; EP 2527091 B1 20171004; CN 102794732 A 20121128; CN 102794732 B 20160803; DE 102011102275 A1 20121129
DOCDB simple family (application)
EP 12165857 A 20120427; CN 201210163235 A 20120523; DE 102011102275 A 20110523