EP 0388627 B1 19940406 - Drop-hammer.
Title (en)
Drop-hammer.
Title (de)
Rammbohrgerät.
Title (fr)
Marteau-pilon.
Publication
Application
Priority
DE 3909567 A 19890323
Abstract (en)
[origin: EP0388627A1] Drop hammer with a striking piston (8) which is axially displaceable in a housing (1) and whose forward and return movement is controlled by a control sleeve (3), engaging in a cylinder space (9) of the striking piston (8) and connected to a supply hose (10), and by one or more corresponding control ports (11) in the striking piston (8), in which arrangement the control sleeve (3) is acted upon both axially and in a rotary manner, has axial and rotary stops (14, 18) and is guided in a rotatable and axially displaceable manner in a guide sleeve (5) arranged at the rear end of the housing (1). <IMAGE>
IPC 1-7
IPC 8 full level
E21B 11/02 (2006.01); E21B 4/14 (2006.01)
CPC (source: EP US)
E21B 4/145 (2013.01 - EP US)
Designated contracting state (EPC)
BE CH FR GB IT LI NL
DOCDB simple family (publication)
EP 0388627 A1 19900926; EP 0388627 B1 19940406; DE 3909567 A1 19900927; DE 3909567 C2 19930819; JP 2672387 B2 19971105; JP H02272189 A 19901106; US 5148878 A 19920922
DOCDB simple family (application)
EP 90102658 A 19900212; DE 3909567 A 19890323; JP 5785590 A 19900308; US 47361190 A 19900201