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. 22, 1979
Filed:
Dec. 12, 1977
George A Parrott, Wakefield, GB;
Paul Greenhough, Cleckheaton, GB;
Dresser Europe S.A., Brussels, BE;
Abstract
A longwall mining machine incorporates breaking apparatus comprising an underframe which may be an integral extension of the main underframe of the machine and which is mounted on the conveyor for movement therealong, such that the breaking apparatus is rigidly secured to, and comprises an integral part of, the mining machine. The breaking apparatus also comprises a rotary breaking element drivably carried by the breaker underframe and a reaction plate, for example, on the same underframe, which is spaced from an adjacent periphery of the breaking element. In use, material, such as coal and rocks, on the conveyor passing between the rotary element and the reaction plate is broken against the reaction plate by the rotating breaking element. In this way, the coal and rocks are broken down to a sufficiently small size that they will not become jammed under the main underframe of the mining machine.