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:
May. 23, 2023
Filed:
Sep. 24, 2019
Applicant:
Joy Global Underground Mining Llc, Warrendale, PA (US);
Inventors:
Keith Dodgson, Burnley, GB;
Mark Brocklehurst, Warrington, GB;
Assignee:
JOY GLOBAL UNDERGROUND MINING LLC, Warrendale, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21D 23/00 (2006.01); E21F 17/18 (2006.01); E21D 23/12 (2006.01); E21D 23/03 (2006.01);
U.S. Cl.
CPC ...
E21D 23/0004 (2013.01); E21D 23/03 (2013.01); E21D 23/12 (2013.01); E21F 17/18 (2013.01);
Abstract
A roof support includes a base, a canopy for engaging a mine surface, a shield coupled to the canopy, and a link coupled between the base and the shield. The canopy is supported relative to the base and includes an end configured to be spaced apart from a mine face by a distance. The link is movable between a first position and a second position, and movement of the link between the first position and the second position causing the distance to change.