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. 04, 2021
Filed:
Aug. 31, 2020
Applicant:
Swanson Industries, Inc., Morgantown, WV (US);
Inventors:
Edward Protiva, Bellaire, OH (US);
Jessica Larew, Tunnelton, WV (US);
Peter Singleton, Canonsburg, PA (US);
Assignee:
Swanson Industries, Inc., Morgantown, WV (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21D 23/00 (2006.01); E21D 23/06 (2006.01);
U.S. Cl.
CPC ...
E21D 23/063 (2013.01); E21D 23/0043 (2013.01);
Abstract
An apparatus and method for protecting a person servicing a longwall shear such changing bits on a drum, embodiments relating to a base plate to be secured to an underside of a shield canopy and a slide plate movably connected to the underside of the base plate such that the slide plate can advance out from the shield canopy to allow a person to service a longwall shear while being protected by the slide plate from falling rock and other debris, and the slide plate can then retract back under the shield canopy.