EP 2558672 B1 20141224 - GROUND-DRILLING DEVICE
Title (en)
GROUND-DRILLING DEVICE
Title (de)
ERDBOHRVORRICHTUNG
Title (fr)
DISPOSITIF DE FORAGE DU SOL
Publication
Application
Priority
- DE 102010015465 A 20100416
- EP 2011001764 W 20110408
Abstract (en)
[origin: WO2011128045A2] The invention relates to a ground-drilling device with a basic body and with a drilling head movably mounted in relation thereto in the longitudinally axial direction, wherein a clearance, which is variable in its size owing to the movable mounting, is formed between the drilling head and the basic body, and with a sealing element for sealing the clearance with respect to the surroundings, wherein the sealing element is designed as a valve element which opens when an overpressure prevails inside the clearance, in order to produce a pressure equalization, and which is closed when a negative pressure prevails inside the clearance, in order to prevent a pressure equalization.
IPC 8 full level
E21B 7/26 (2006.01); E21B 17/03 (2006.01); E21B 17/04 (2006.01)
CPC (source: EP US)
E21B 4/145 (2013.01 - EP US); E21B 17/03 (2013.01 - EP US)
Citation (examination)
EP 0181712 A1 19860521 - ALLIED STEEL TRACTOR PROD INC [US]
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
DE 102010015465 A1 20111020; EP 2558672 A2 20130220; EP 2558672 B1 20141224; PL 2558672 T3 20150630; US 2013025936 A1 20130131; US 9328560 B2 20160503; WO 2011128045 A2 20111020; WO 2011128045 A3 20120607
DOCDB simple family (application)
DE 102010015465 A 20100416; EP 11717182 A 20110408; EP 2011001764 W 20110408; PL 11717182 T 20110408; US 201113640892 A 20110408