EP 0133557 B1 19880107 - RATCHET WRENCH FOR DRIVING SCREWS
Title (en)
RATCHET WRENCH FOR DRIVING SCREWS
Publication
Application
Priority
DE 3328673 A 19830809
Abstract (en)
[origin: US4608872A] The hand-operated ratchet spanner contains a measuring value pick-up (4,9) for the angle of rotation of the screw and a device for measuring the torque. The measured values are supplied to a microprocessor (22) in which the screw tightening operation is preprogrammed by respective desired or limit values. Signal lamps (30,31,32) or acoustic signal transmitters (33) indicate to the user as to whether the screw has been correctly tightened. Further, he may recognize the extent to which the screw has been tightened and which part of the tightening operation must be still effected.
IPC 1-7
IPC 8 full level
B25B 23/142 (2006.01); B25B 23/144 (2006.01)
CPC (source: EP US)
B25B 23/1425 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB IT SE
DOCDB simple family (publication)
EP 0133557 A1 19850227; EP 0133557 B1 19880107; DE 3468358 D1 19880211; US 4608872 A 19860902
DOCDB simple family (application)
EP 84109231 A 19840803; DE 3468358 T 19840803; US 63901984 A 19840809