EP 1089855 A1 20010411 - PNEUMATIC IMPACT MECHANISM WITH A DRIVE PISTON HAVING A REDUCED WALL THICKNESS
Title (en)
PNEUMATIC IMPACT MECHANISM WITH A DRIVE PISTON HAVING A REDUCED WALL THICKNESS
Title (de)
LUFTFEDERSCHLAGWERK MIT ANTRIEBSKOLBEN MIT GERINGER WANDSTÄRKE
Title (fr)
DISPOSITIF DE PERCUSSION PNEUMATIQUE AVEC PISTON D'ENTRAINEMENT A FAIBLE EPAISSEUR DE PAROI
Publication
Application
Priority
- DE 19828426 A 19980625
- EP 9904415 W 19990624
Abstract (en)
[origin: DE19828426A1] The invention relates to a pneumatic impact mechanism for a paving breaker and/or hammer drill which is characterized by a drive piston (1) having air equalization slits (5) and an extremely reduced wall thickness of the guide sleeve (1a) thereof. This leads to a distinct reduction of the vibrations during the no-load operation of the impact mechanism, whereby advantageous characteristics of the impact mechanism with regard to wear behavior and compactness can be retained.
IPC 1-7
IPC 8 full level
B25D 11/00 (2006.01); B25D 11/12 (2006.01); B25D 17/00 (2006.01); B25D 17/06 (2006.01)
CPC (source: EP US)
B25D 11/005 (2013.01 - EP US); B25D 17/00 (2013.01 - EP US); B25D 2211/003 (2013.01 - EP US)
Citation (search report)
See references of WO 9967064A1
Designated contracting state (EPC)
CH DE ES FR GB IT LI NL SE
DOCDB simple family (publication)
DE 19828426 A1 20000113; DE 19828426 C2 20030403; DE 59901204 D1 20020516; EP 1089855 A1 20010411; EP 1089855 B1 20020410; ES 2174622 T3 20021101; JP 2002518197 A 20020625; JP 4862124 B2 20120125; US 6237700 B1 20010529; WO 9967064 A1 19991229
DOCDB simple family (application)
DE 19828426 A 19980625; DE 59901204 T 19990624; EP 9904415 W 19990624; EP 99931180 A 19990624; ES 99931180 T 19990624; JP 2000555733 A 19990624; US 62254600 A 20000816