EP 4021683 B1 20231220 - POWER TOOL FOR GENERATING AN INSTANTANEOUS TORQUE
Title (en)
POWER TOOL FOR GENERATING AN INSTANTANEOUS TORQUE
Title (de)
ELEKTROWERKZEUG ZUR ERZEUGUNG EINES UNMITTELBAREN DREHMOMENTS
Title (fr)
OUTIL ÉLECTRIQUE DESTINÉ À GÉNÉRER UN COUPLE INSTANTANÉ
Publication
Application
Priority
CN 2019102722 W 20190827
Abstract (en)
[origin: WO2021035512A1] A power tool (10) including a transmission mechanism (12), an output shaft (14) driven by the transmission mechanism (12), and a hydraulic unit (16) filled with a working fluid. The hydraulic unit (16) is disposed coaxially with the output shaft (14), and defines a rotatively driving mechanism (18), a first fluid chamber (20), and a second fluid chamber (22). The first fluid chamber (20) is in intermittently fluid connection with the second fluid chamber (22) via a fluid channel (28). A relative rotation between the hydraulic unit (16) and the output shaft (14) causes the rotatively driving mechanism (18) to axially compress or expand a volume of the second fluid chamber (22) for raising or decreasing a fluid pressure of the second fluid chamber (22), generating a pressure difference between the first fluid chamber (20) and the second fluid chamber (22) to cause an instantaneous torque to the output shaft (14).
IPC 8 full level
B25B 21/02 (2006.01)
CPC (source: EP)
B25B 21/026 (2013.01)
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
DOCDB simple family (publication)
WO 2021035512 A1 20210304; CN 216067235 U 20220318; EP 4021683 A1 20220706; EP 4021683 A4 20230503; EP 4021683 B1 20231220; EP 4021683 C0 20231220
DOCDB simple family (application)
CN 2019102722 W 20190827; CN 201990001317 U 20190827; EP 19942829 A 20190827