EP 0141617 A2 19850515 - Geotechnical device.
Title (en)
Geotechnical device.
Title (de)
Geotechnische Vorrichtung.
Title (fr)
Dispositif géotechnique.
Publication
Application
Priority
GB 8328831 A 19831028
Abstract (en)
A geotechnical device, which among other purposes is useful for sampling soil or rock in percussive boring or rotary drilling operations, comprises a one-piece, normally flat member (1) of resilient material, having a continuous circular circumference and having at least one projection extending from said circumference towards or beyond its centre. In one preferred form the device comprises a circular disc (1) of resilient material, having at least three radial cuts or slots (2) extending from the centre of the disc towards its circumference and having one or more concentric ribs (5) between the centre (3) of the disc and the radially outer limit (4) of the cuts or slots (2).
IPC 1-7
IPC 8 full level
E21B 25/10 (2006.01)
CPC (source: EP)
E21B 25/10 (2013.01)
Designated contracting state (EPC)
BE CH DE FR GB IT LI NL SE
DOCDB simple family (publication)
EP 0141617 A2 19850515; EP 0141617 A3 19870225; GB 8328831 D0 19831130
DOCDB simple family (application)
EP 84307311 A 19841024; GB 8328831 A 19831028