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:
Apr. 04, 1978
Filed:
Jun. 23, 1976
Applicant:
Inventors:
John A Campbell, Action, MA (US);
Daniel J Moynihan, Chelmsford, MA (US);
Assignee:
Peabody Coal Company, Belleville, IL (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21D / ; E21D / ;
U.S. Cl.
CPC ...
299 33 ; 61 4 / ; 299 43 ;
Abstract
An articulated ancillary support for a conveyor is attached onto the forward side of a mine roof chock by extensible means which, when retracted towards the chock, shifts the ancillary support from a normal condition in which it occupies an area of relatively wide lateral extent to another condition in which it overlies an area of relatively narrow lateral extent, freeing a large portion of the space under the chocks to clear the way for a retreating continuous miner.