EP 0934804 A3 20030305 - Fluid driven percussion device
Title (en)
Fluid driven percussion device
Title (de)
Druckmittelbetriebene Schlagvorrichtung
Title (fr)
Dispositif à percussion actionné par fluide
Publication
Application
Priority
DE 19803449 A 19980130
Abstract (en)
[origin: US6959967B1] A fluid-powered impact vibrator ( 5 ), in particular a hydraulic hammer, comprising a fluid-powered percussion hammer ( 8 ) with a percussion piston ( 18 ) that is moved back and forth under the effect of a control means ( 10 ) and comprising a guide unit ( 7 ) on which the percussion hammer is supported, wherein the impact vibrator is additionally provided with a control valve, designed as a pressure monitor, for adaptation to the supplied input power. The control valve preferably is a pressure shut-off valve or a pressure-limiting valve ( 25 ) that is connected to the input pressure line ( 3 ) provided with the operating pressure, and automatically stops the percussion hammer ( 8 ) if the operating pressure resulting from the input power exceeds a specified maximum value. To stop the percussion hammer ( 8 ), either the pressure line ( 3 ) is blocked or the control means ( 10 ) is held in one of its end positions, i.e., the operating stroke or the return stroke positions. Moreover, the pressure shut-off valve or the pressure-limiting valve ( 25 ) preferably is a component of the guide unit, consisting of a support frame ( 7 ), or the percussion hammer ( 8 ) itself.
IPC 1-7
IPC 8 full level
B25D 9/26 (2006.01); B25D 17/10 (2006.01); E21B 1/26 (2006.01)
CPC (source: EP US)
B25D 9/26 (2013.01 - EP US)
Citation (search report)
- [A] FR 2397578 A1 19790209 - BAUDET ALAIN [FR]
- [A] US 4900093 A 19900213 - KRONE JOHN J [US], et al
- [A] US 4718329 A 19880112 - NAKAJIMA KICHIO [JP], et al
- [A] PATENT ABSTRACTS OF JAPAN vol. 009, no. 046 (M - 360) 27 February 1985 (1985-02-27)
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
US 6959967 B1 20051101; AT E315457 T1 20060215; DE 19803449 A1 19990805; DE 59913032 D1 20060406; EP 0934804 A2 19990811; EP 0934804 A3 20030305; EP 0934804 B1 20060111; ES 2257827 T3 20060801
DOCDB simple family (application)
US 23873599 A 19990128; AT 99101199 T 19990122; DE 19803449 A 19980130; DE 59913032 T 19990122; EP 99101199 A 19990122; ES 99101199 T 19990122