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. 02, 2004
Filed:
Jul. 10, 2002
Barry M. Newberg, Florissant, MO (US);
Gary W. Borcherding, Florissant, MO (US);
Emerson Electric Co., St. Louis, MO (US);
Abstract
A lubricant leakage stop is provided on the shaft of a rotary device in the form of an annular groove in the shaft. In one embodiment the annular groove is formed with an annular inner surface at the bottom of the groove and with an annular intermediate surface positioned between two portions of the annular inner surface. The intermediate surface has a larger diameter dimension than the two inner surface portions on the axially opposite sides of the intermediate surface. The intermediate surface also has a smaller diameter dimension than that of the two portions of the shaft outer surface on axially opposite sides of the groove. In a second embodiment, the annular groove is formed with an annular inner surface that tapers from the bottom of the groove outwardly to the outer surface of the shaft on one side of the groove. Any lubricant leakage axially along the shaft outer surface is stopped by the annular groove and is thrown by rotation of the shaft radially outwardly from the shaft intermediate surface to a lubricant reservoir surrounding the shaft. Each annular groove intersects the shaft outer surface at an annular, chamfered surfaces at one side of the groove. The reduced diameter of the shaft intermediate surface and the annular chamfered surface of the shaft allow component parts of the rotary device to be press fit over the groove without being damaged by the construction of the groove.