Extraction system for a mineral cutter pick
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United States of America Patent
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Mar 4, 2014
Grant Date -
Dec 13, 2012
app pub date -
Feb 3, 2011
filing date -
Feb 22, 2010
priority date (Note) -
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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), while further movement of the piston (12) results in extraction, if required, of sleeve (19).
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