EP 1648663 A2 20060426 - HOLLOW PISTON HAMMER DEVICE WITH AIR EQUILIBRATION AND IDLE OPENINGS
Title (en)
HOLLOW PISTON HAMMER DEVICE WITH AIR EQUILIBRATION AND IDLE OPENINGS
Title (de)
HOHLKOLBENSCHLAGWERK MIT LUFTAUSGLEICHS- UND LEERLAUFÖFFNUNG
Title (fr)
MECANISME DE PERCUSSION A PISTON CREUX COMPORTANT UNE OUVERTURE DE COMPENSATION PNEUMATIQUE ET DE FONCTIONNEMENT A VIDE
Publication
Application
Priority
- EP 2004008294 W 20040723
- DE 10333799 A 20030724
Abstract (en)
[origin: WO2005009688A2] An air spring hammer device comprises a drive piston (3), moving axially back and forth, with a front face of hollow embodiment and a hammer piston (6) moving in said hollow. A ventilation slot (13) is embodied in a guide wall (5) of the drive piston (3). The drive piston (3) may be guided in a guide tube (15). The guide tube (15) comprises several idle openings (16). A moving control element (17) is arranged on the exterior of the guide tube (15), in which control openings (18), corresponding to the idle openings (16), are provided. In an idle operating mode, the control element (17) is in an open position, by means of which the ventilation slot (13), the idle openings (16) and the control openings (18) can be brought into connection with the environment.
IPC 1-7
IPC 8 full level
B25D 11/00 (2006.01); B25D 11/12 (2006.01); E21B 1/24 (2006.01); E21B 1/26 (2006.01); E21B 1/30 (2006.01); E21B 1/34 (2006.01)
CPC (source: EP US)
B25D 11/005 (2013.01 - EP US); B25D 11/125 (2013.01 - EP US); B25D 2250/035 (2013.01 - EP US); B25D 2250/131 (2013.01 - EP US)
Citation (search report)
See references of WO 2005009688A2
Designated contracting state (EPC)
CH DE ES IT LI SE
DOCDB simple family (publication)
WO 2005009688 A2 20050203; WO 2005009688 A3 20050407; DE 10333799 B3 20050217; DE 502004007398 D1 20080731; EP 1648663 A2 20060426; EP 1648663 B1 20080618; ES 2305815 T3 20081101; JP 2006528558 A 20061221; JP 4751324 B2 20110817; US 2006124333 A1 20060615; US 2008073096 A1 20080327; US 7726414 B2 20100601
DOCDB simple family (application)
EP 2004008294 W 20040723; DE 10333799 A 20030724; DE 502004007398 T 20040723; EP 04763463 A 20040723; ES 04763463 T 20040723; JP 2006520813 A 20040723; US 55948505 A 20051206; US 93083907 A 20071031