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. 09, 1978
Filed:
Feb. 01, 1977
Maurice K LeBegue, Argillite, KY (US);
Charles R Herron, Russell, KY (US);
National Mine Service Company, Pittsburgh, PA (US);
Abstract
A continuous mining machine is propelled on endless crawler tracks and includes a body portion with a boom extending forwardly therefrom. The boom rotatably supports a drum having peripherally extending cutting elements. A boom stabilizer mounted on the boom includes a plate member pivotally connected at one end to the boom rearward of the drum. A piston cylinder assembly is pivotally mounted on the boom member and includes an extensible piston rod that is pivotally connected to the opposite end of the plate member. Extension of the piston rod pivots the plate member upwardly to a preselected height where the plate upper surface lies on a line tangent to the cutting path of the cutting elements at the top of the drum. When the drum is positioned adjacent the mine roof for sumping into the mine face, the stabilizing plate abuts the mine roof with the cutting elements displaced from the mine roof. As the drum is sumped forward the stabilizing plate prevents the drum from climbing the face into the mine roof. Thus, the drum drive motors are not overloaded by the drum simultaneously cutting the mine roof and face, and a preselected mine roof height is maintained during the mining operation.