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:
Jun. 23, 1992
Filed:
Oct. 17, 1990
Applicant:
Inventor:
John H Pennington, Green River, WY (US);
Assignee:
General Chemical Corp., Parsippany, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21F / ;
U.S. Cl.
CPC ...
299 64 ; 198309 ; 1988611 ;
Abstract
A moveable hydraulic aligner device, particularly suited for aligning a roadway used with a full continuous tram mining machine following a drilling cycle, comprises an upper portion, supported by wheels which allow the device to ride along the length of the roadway, to which two side portions are attached. Each of the side portions supports an extendable hydraulic cylinder which pushes against the rib of a mine tunnel to force the roadway back to the center.