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:
Sep. 06, 1977
Filed:
Sep. 10, 1975
Robert D Harris, Delmont, PA (US);
Abstract
A bearing assembly for a rotary drilling tool for a continuous mining machine includes inner and outer races having respective annular bearing surfaces and an annular channel formed between the races for water lubrication and cooling of roller bearing members positioned within the channel. A pump supplies pressurized flow through the channel sufficient to lubricate the bearing and to prevent feedback of rock particles. A transfer passageway drains the water from the bearing assembly and feeds it to the tool to cool the cutter teeth and to allay the fine respirable dust which is potential health hazard to the mine workers. The rollers of the bearing each include an annular notch to form a portion of the flow channel. The notches occupy approximately fifteen percent of the cross-sectional area. Elastic ring support for the outer race absorbs a major portion of the drilling stress from the tool. Rotary water seals and wipers beside the bearings form a rotary water-tight joint. The bearing assembly maintains the concentric position of the fixed and rotary elements of the seals and wipers.