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:
Jul. 05, 1988
Filed:
Nov. 13, 1986
George A Parrott, Sandal, GB;
Dosco Overseas Engineering Ltd., Nottinghamshire, GB;
Abstract
A roadheader type mining machine (1) comprises a self-propelled chassis (6), an elongate boom (9) having a longitudinal axis (10), rotary cutting head (15) having a plurality of water spray nozzles (17). The boom (9) is of a two-part construction comprising an inner part (18) that is non-rotatable about the boom longitudinal axis (10), that is supported from one end (8) on the chassis (6), and that carries towards its other end (14) bearing means (19) for rotatably supporting an outer part (20) that axially extends from said inner part (18). Power means (59) is carried by the non-rotatable part (18) to rotate the rotatable part (20) about the boom longitudinal axis, while the rotatable part (20) is provided with pumping means (39) and a bearing ring (50) that is carried by the rotatable part (20) eccentrically with respect to the axis (10), whereby phased water supply to the nozzles (17) is controlled by suitable angular rotation of the rotatable part (20) about the axis (10) to cause consequent rotation of the ring (50).