Global patent index - EP 0970290 A1

EP 0970290 A1 2000-01-12 - PICK HOLDER AND PICK BOX ASSEMBLY

Title (en)

PICK HOLDER AND PICK BOX ASSEMBLY

Title (de)

MEISSELHALTER UND HALTEBLOCK VORRICHTUNG

Title (fr)

PORTE-PIC ET ENSEMBLE PORTE-PIC

Publication

EP 0970290 A1 (EN)

Application

EP 98906999 A

Priority

  • GB 9800493 W
  • GB 9704554 A

Abstract (en)

[origin: WO9839553A1] A semi-locking pick box assembly (10) comprises a pick holder (30), a hydraulic seal (40) and a closed pick box (50). The pick holder has a frusto conical shank (33) with a base (34) and the closed pick box (50) has a shank chamber (51), a piston chamber (52) and a hydraulic duct (54). The shank chamber (51) matches the shape of the frusto conical shank (33) so that the pick holder (30) can lockingly fasten to the closed pick box (50) when the pick holder and closed pick box are engaged. The piston chamber (52) communicates with the shank chamber (51) and houses the hydraulic seal (40) so as to form a hydraulic piston which can act on the base of the frusto conical shank. The hydraulic duct (54) communicates between the piston chamber (52) and externally of the closed pick box (50) so that hydraulic pressure can be applied via the hydraulic duct (54) to the hydraulic seal (40) to cause the pick holder (30), when lockingly engaging the closed pick box (50), to move axially and be released from the closed pick box (50).

IPC 1-7 (main, further and additional classification)

E21C 35/193

IPC 8 full level (invention and additional information)

E21C 35/193 (2006.01); E21C 35/18 (2006.01); E21C 35/19 (2006.01)

CPC (invention and additional information)

E21C 35/193 (2013.01); E21C 2035/1826 (2013.01); E21C 2035/191 (2013.01)

Citation (search report)

See references of WO 9839553A1

Designated contracting state (EPC)

BE DE ES FR GB NL

EPO simple patent family

WO 9839553 A1 19980911; EP 0970290 A1 20000112; GB 9704554 D0 19970423

INPADOC legal status

2002-05-15 [18R] REFUSED

- Ref Legal Event Code: 18R

- Effective date: 20010929

2000-06-14 [17Q] FIRST EXAMINATION REPORT

- Ref Legal Event Code: 17Q

- Effective date: 20000502

2000-01-12 [17P] REQUEST FOR EXAMINATION FILED

- Ref Legal Event Code: 17P

- Effective date: 19991005

2000-01-12 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): BE DE ES FR GB NL