EP 0699508 B1 19980930 - Hydraulic impact screwdriver especially for tightening threaded connection
Title (en)
Hydraulic impact screwdriver especially for tightening threaded connection
Title (de)
Hydro-Impulsschrauber insbesondere zum Anziehen von Schraubverbindungen
Title (fr)
Visseuse à percussion hydraulique notamment pour le serrage de connections filetées
Publication
Application
Priority
DE 4429282 A 19940818
Abstract (en)
[origin: EP0699508A1] The switch-off unit has an adjusting element (23), standing and located int he motor shaft of the compressed air motor (4),a nd is in pressure conducting communication with the pressure building cylinder chamber of the impact mechanism. A torque related signal is transmitted to the switch-off unit across the adjusting element (23). With the reaching of a specified torque limit value, the pressure supply to the compressed air motor is interrupted. The adjusting element (23) reacts on a transverse beam (27), which is provided with at least one measurement value pick-up, designed pref. as a strain gauge strip (31). For determining a bending moment depending on a pulse pressure in the impact mechanism cylinder chamber (14), this bending moment is compared in a pref. electronic evaluation unit (40) with a specified torque limit value. When this is reached the switch-off unit is operated
IPC 1-7
IPC 8 full level
B25B 23/145 (2006.01)
CPC (source: EP US)
B25B 23/1453 (2013.01 - EP US); B25B 23/1456 (2013.01 - EP US)
Designated contracting state (EPC)
DE ES FR GB IT SE
DOCDB simple family (publication)
DE 4429282 A1 19960222; CA 2156373 A1 19960219; CA 2156373 C 19980512; DE 59503770 D1 19981105; EP 0699508 A1 19960306; EP 0699508 B1 19980930; ES 2123866 T3 19990116; US 5567886 A 19961022
DOCDB simple family (application)
DE 4429282 A 19940818; CA 2156373 A 19950817; DE 59503770 T 19950710; EP 95110755 A 19950710; ES 95110755 T 19950710; US 51632795 A 19950817