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. 09, 1993
Filed:
May. 28, 1991
Thomas M Hartman, Des Moines, WA (US);
David B Sugden, Tasmania, AU;
The Robbins Company, Kent, WA (US);
Abstract
A mobile mining machine for cutting a tunnel in rock has a wheel-like cutterhead assembly supported by a pitch boom assembly that causes movement of the cutterhead assembly in the vertical plane. A swing boom assembly supports the pitch boom assembly and is supported by the base frame of the mobile mining machine. The swing boom assembly causes movement of the cutterhead assembly and the pitch boom assembly in the horizontal plane. During mining, a fixed front support and a fixed rear support anchor the mobile mining machine in the tunnel with front and rear crawlers raised from the tunnel floor. During re-gripping, the front and rear crawlers are lowered to support the mobile mining machine and the fixed front support and fixed rear support remain in contact with the tunnel floor. During tramming, the front and rear supports are raised for transportation of the mobile mining machine on the crawler. A movable muck apron assembly having pivoting apron wings and an integral muck hopper is located on the front portion of the mobile mining machine.