EP 0154778 B1 19871125 - PERCUSSION DRILL
Title (en)
PERCUSSION DRILL
Publication
Application
Priority
DE 8403508 U 19840207
Abstract (en)
[origin: EP0154778A1] 1. Pneumatically driven percussion drill, in particular deep drill hammer (10), including an outer tube (12) and a passage (18) in an upper cap (14) for connection to a compressed-air source and, if applicable, to boring rods, including a control unit (24) supported in the cap and a central tube (30) joined to the control unit, the central tube being designed as air feeding and air discharging tube having passages (31...38) as well as a gating insert (40), a hollow ram (50) being slidably guided along the insert in the outer tube, and including a lower mounting cap (94) which has an inner profile and which supports, for up-and-down movement, a hollow shaft (86) having a matching outer profile as well as flushing bores, wherein at least one cone (60, 61) is provided or attachable at the crown head (58) and/or at the central tube end and/or inside the ram end.
IPC 1-7
IPC 8 full level
CPC (source: EP)
E21B 4/14 (2013.01)
Designated contracting state (EPC)
AT BE CH DE FR GB IT LI LU NL SE
DOCDB simple family (publication)
EP 0154778 A1 19850918; EP 0154778 B1 19871125; AT E31102 T1 19871215; DE 3561078 D1 19880107; DE 8403508 U1 19840503
DOCDB simple family (application)
EP 85100637 A 19850123; AT 85100637 T 19850123; DE 3561078 T 19850123; DE 8403508 U 19840207