Title:
EXTRACTION SYSTEM FOR A MINERAL CUTTER PICK
Document Type and Number:
WIPO Patent Application WO/2011/101612
Kind Code:
A3
Abstract:
A system for extraction of a mineral cutter pick (1), and optionally any interposed sleeve (19), the pick (1 ) comprises an elongate shank (4) extending from an enlarged head (2), has a piston (12) coaxial with the shank (4), with one end face (16) of the piston (12) subjectable to hydraulic pressure fluid, and with another, opposite end face (15) of the piston (12) capable of engaging an end face (5) of the shank (4), a sealing ring (14) to prevent passage of hydraulic fluid being carried by the piston (12), whereby axial movement of the piston (12), under hydraulic pressure, in turn axially displaces the pick (1 ), whilst further movement of the piston (12) results in extraction, if required, of sleeve (19).
Inventors:
PARROTT GEORGE ALBERT (GB)
Application Number:
PCT/GB2011/000136
Publication Date:
March 01, 2012
Filing Date:
February 03, 2011
Export Citation:
Assignee:
MINNOVATION LTD (GB)
PARROTT GEORGE ALBERT (GB)
PARROTT GEORGE ALBERT (GB)
International Classes:
E21C35/19
Domestic Patent References:
| WO1998039553A1 | 1998-09-11 |
Foreign References:
| US20090293249A1 | 2009-12-03 | |||
| US20090019679A1 | 2009-01-22 | |||
| US4337980A | 1982-07-06 |
Attorney, Agent or Firm:
LONG, Edward, Anthony et al. (St James House2nd Floor,Vicar Lane, Sheffield S1 2EX, GB)
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