The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 04, 2014
Filed:
Feb. 03, 2011
George Albert Parrott, Wakefield, GB;
George Albert Parrott, Wakefield, GB;
Minnovation Limited, , GB;
Abstract
A system for extraction of a mineral cutter pick (), and optionally any interposed sleeve (), the pick () comprises an elongate shank () extending from an enlarged head (), has a piston () coaxial with the shank (), with one end face () of the piston () subjectable to hydraulic pressure fluid, and with another, opposite end face () of the piston () capable of engaging an end face () of the shank (), a sealing ring () to prevent passage of hydraulic fluid being carried by the piston (), whereby axial movement of the piston (), under hydraulic pressure, in turn axially displaces the pick (), while further movement of the piston () results in extraction, if required, of sleeve ().