EP 1400313 A1 20040324 - Hydraulically operated ratchet spanner with a double-acting hydraulic cylinder/piston drive
Title (en)
Hydraulically operated ratchet spanner with a double-acting hydraulic cylinder/piston drive
Title (de)
Hydraulik-Ratschenschrauber mit einem doppeltwirkenden Hydraulik-Zylinder-Kolben-Antrieb
Title (fr)
Clé à cliquet hydraulique avec entraînement hydraulique à piston-cylindre à double effet
Publication
Application
Priority
EP 02020916 A 20020919
Abstract (en)
The ratchet screwdriver (12) is operated by the piston rod (15) of a double-action hydraulic piston-cylinder drive, the hydraulic oil supplied via a hydraulic pump unit (1) with cogwheel pump (20) and a radial piston pump (21) operated by a pump motor (4), the cogwheel pump providing a relatively large feed quantity for each motor rotation and the piston pump providing a relatively small feed quantity for each motor rotation. The working stroke and the return stroke of the piston rod are effected by reversing the rotation direction of the pump motor via a pump motor control (22), with automatic adjustment of the volumetric flow.
Abstract (de)
Die Erfindung betrifft einen Hydraulik-Ratschenschrauber mit einem doppeltwirkenden Hydraulik-Zylinder-Kolben-Antrieb mit einer Zahnradpumpe (20) und einer Kolbenpumpe (21). Erfindungsgemäß wird ein Arbeitshub und ein Rückhub über eine Drehrichtungsumkehr eines Pumpenmotors (4) gesteuert, wobei sich die erforderlichen Volumenströme selbsttätig über die eingesetzten Ventile ohne zusätzliche Ventilansteuerungen einstellen. <IMAGE>
IPC 1-7
IPC 8 full level
B25B 21/00 (2006.01); F15B 7/00 (2006.01); F15B 7/04 (2006.01)
CPC (source: EP US)
B25B 21/005 (2013.01 - EP US); B25B 23/145 (2013.01 - EP US); F15B 7/001 (2013.01 - EP US); F15B 7/006 (2013.01 - EP US); F15B 7/04 (2013.01 - EP US)
Citation (search report)
- [A] DE 3719893 A1 19881229 - WAGNER PAUL HEINZ [DE]
- [A] US 5617771 A 19970408 - LANDRUM MICHAEL T [US]
- [A] DE 19813900 A1 19990930 - HOHMANN FRANK [DE], et al
- [A] FR 2033047 A5 19701127 - ORENSTEIN & KOPPEL AG
- [A] FR 2745216 A1 19970829 - TURRIPINOISE DE MECANIQUE SA S [FR]
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR
DOCDB simple family (publication)
EP 1400313 A1 20040324; EP 1400313 B1 20050727; AT E300396 T1 20050815; DE 50203771 D1 20050901; US 2004103762 A1 20040603; US 6966240 B2 20051122
DOCDB simple family (application)
EP 02020916 A 20020919; AT 02020916 T 20020919; DE 50203771 T 20020919; US 66694303 A 20030919