EP 2921639 A1 20150923 - Percussive drill bit with multiple sets of front cutting inserts

Title (en)

Percussive drill bit with multiple sets of front cutting inserts

Title (de)

Schlagbohrer mit mehreren Sätzen von Schneideinsätzen

Title (fr)

Trépan à percussion avec de multiples ensembles d'inserts de coupe avant

Publication

EP 2921639 A1 20150923 (EN)

Application

EP 14160500 A 20140318

Priority

EP 14160500 A 20140318

Abstract (en)

A percussive rock drill bit (100) comprising: a head (101) provided at one end of an elongate shank (102), the head (101) having a forward facing front face (105) defined by a perimeter edge (106); a plurality of front cutting inserts (104) distributed at the front face (105) at different radial positions between a central axis (108) extending through the drill bit and a perimeter edge (106) of the front face (105); front cutting inserts are grouped into a plurality of sets (206 to 208) with each set (206 to 208) positioned at a different radial distance from the axis (108) and each insert (104) of each respective set (206 to 208) is positioned at substantially the same radial distance; wherein the sets (206 to 208) each comprise the same number of inserts (104).

IPC 8 full level

E21B 10/36 (2006.01); E21B 10/40 (2006.01); E21B 10/46 (2006.01)

CPC (source: CN EP KR RU US)

E21B 10/36 (2013.01 - CN EP KR RU US); E21B 10/40 (2013.01 - CN EP KR US); E21B 10/46 (2013.01 - CN EP KR US)

Citation (applicant)

US 3357507 A 19671212 - STEWART VERNON G
US 3388756 A 19680618 - VAREL DANIEL W, et al
US 3955635 A 19760511 - SKIDMORE SAM C
US 2008087473 A1 20080417 - HALL DAVID R [US], et al
US 2008078584 A1 20080403 - LYON LELAND H [US]
WO 2012017460 A1 20120209 - URBANTECH S R L [IT], et al
WO 2006033606 A1 20060330 - SANDVIK INTELLECTUAL PROPERTY [SE], et al
WO 2009067073 A1 20090528 - SANDVIK INTELLECTUAL PROPERTY [SE], et al
US 7527110 B2 20090505 - HALL DAVID R [US], et al
US 7392863 B2 20080701 - BJOERK FREDRIK [SE]
EP 2592216 A1 20130515 - SANDVIK INTELLECTUAL PROPERTY [SE]
WO 2012038428 A1 20120329 - SANDVIK INTELLECTUAL PROPERTY [SE], et al
EP 2383420 A1 20111102 - SANDVIK INTELLECTUAL PROPERTY [SE]

Citation (search report)

[X] DE 3941609 C1 19911024
[X] WO 9423172 A1 19941013 - SDS PTY LTD [AU], et al
[X] US 3382940 A 19680514 - STEBLEY FRANK E
[X] US 3738435 A 19730612 - BRONSON C
[X] US 5025875 A 19910625 - WITT LEWIS [US]
[X] WO 2004111381 A1 20041223 - SHELL INT RESEARCH [NL], et al

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

Designated extension state (EPC)

BA ME

DOCDB simple family (publication)

EP 2921639 A1 20150923; AU 2015233739 A1 20160901; AU 2015233739 B2 20180802; AU 2015233739 C1 20181122; CA 2939473 A1 20150924; CN 106103879 A 20161109; CN 106103879 B 20190726; KR 20160133445 A 20161122; MX 2016011966 A 20161215; RU 2016140628 A 20180418; RU 2016140628 A3 20180702; RU 2671386 C2 20181030; US 2017081920 A1 20170323; WO 2015139989 A2 20150924; WO 2015139989 A3 20160121

DOCDB simple family (application)

EP 14160500 A 20140318; AU 2015233739 A 20150309; CA 2939473 A 20150309; CN 201580011437 A 20150309; EP 2015054846 W 20150309; KR 20167025105 A 20150309; MX 2016011966 A 20150309; RU 2016140628 A 20150309; US 201515126335 A 20150309