Global Patent Index - EP 2781684 A1

EP 2781684 A1 20140924 - Roller cutter with improved sealing

Title (en)

Roller cutter with improved sealing

Title (de)

Rollenschneider mit verbesserter Dichtung

Title (fr)

Trépan à molettes avec étanchéité améliorée

Publication

EP 2781684 A1 20140924 (EN)

Application

EP 13160149 A 20130320

Priority

EP 13160149 A 20130320

Abstract (en)

A roller cutter (14) intended to be used at a drill head for rotary boring of the front of earth and rock formations, said roller cutter having a centre line (CL) and being provided with a hub (24) provided with rows of crushing members (29), at least one crushing member having its longitudinal axis at an angle relative to a normal to the centre line (CL), said hub being rotatable in relation to a shaft (33) having shaft spigots (34, 35), the roller cutter being provided with at least one seal retainer (38) arranged at an axial end of the hub in order to hold sealing means (37) in position, wherein the hub comprises at least one circumferential recess (44) positioned axially inward relative to a radially inward projecting flange (43) in the hub.

IPC 8 full level

E21B 10/25 (2006.01)

CPC (source: EP US)

E21B 10/10 (2013.01 - EP US); E21B 10/25 (2013.01 - EP US)

Citation (applicant)

Citation (search report)

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 2781684 A1 20140924; AU 2014234545 A1 20150917; BR 112015022729 A2 20180508; CA 2903301 A1 20140925; CL 2015002775 A1 20160527; CN 105121773 A 20151202; MX 2015013311 A 20160125; PE 20151581 A1 20151105; RU 2015144868 A 20170426; US 2016040482 A1 20160211; WO 2014146913 A1 20140925

DOCDB simple family (application)

EP 13160149 A 20130320; AU 2014234545 A 20140307; BR 112015022729 A 20140307; CA 2903301 A 20140307; CL 2015002775 A 20150916; CN 201480016275 A 20140307; EP 2014054472 W 20140307; MX 2015013311 A 20140307; PE 2015002038 A 20140307; RU 2015144868 A 20140307; US 201414778630 A 20140307