EP 0676260 B1 19990217 - An impulse torque generator for a hydraulic power wrench
Title (en)
An impulse torque generator for a hydraulic power wrench
Title (de)
Hydraulische Drehmomentimpulserzeugung
Title (fr)
Générateur hydraulique de couple à impulsion
Publication
Application
Priority
- JP 9575394 A 19940408
- JP 8639395 A 19950317
Abstract (en)
[origin: EP0676260A1] Objective of the invention is to provide an impulse torque generator for hydraulic impulse torque wrench having a high energy efficiency, and low temperature increase of the hydraulic oil. The impulse generator comprising a liner (11,21,31,41), driven by a rotor, having inner cavity and at least four, or two pairs (2n) of seal surfaces around its inner surface, a main shaft (9) having at least two (n) projections on its surface mounted coaxially within the liner (11,21,31,41) and at least two (n) driving blades(14a,14b,24a,24b,34a,34b,44a,44b) generating impulse torque on the main shaft abutting the projections of the main shaft (9). (n is an integer greater than or equal to 2) <IMAGE>
IPC 1-7
IPC 8 full level
B25B 21/02 (2006.01)
CPC (source: EP)
B25B 21/02 (2013.01)
Designated contracting state (EPC)
DE FR GB IT SE
DOCDB simple family (publication)
EP 0676260 A1 19951011; EP 0676260 B1 19990217; DE 69507845 D1 19990325; DE 69507845 T2 19990617; JP 2804904 B2 19980930; JP H07328944 A 19951219; KR 100334211 B1 20021118
DOCDB simple family (application)
EP 95302273 A 19950405; DE 69507845 T 19950405; JP 8639395 A 19950317; KR 19950008072 A 19950407