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:
Nov. 20, 1990
Filed:
Nov. 14, 1988
Eagle Industry Co., Ltd., Tokyo, JP;
Abstract
A shaft seal for sealing fluids includes a rotating shaft means having an axis and an external cylindrical surface. A seal ring is disposed about the shaft and has an internal cylindrical surface juxtaposed to the external cylindrical surface and mating therewith to form mating cylindrical surfaces. One of the cylindrical surfaces is a smooth cylindrical surface, and a plurality of spaced, generally parallel indentations are formed in the smooth cylindrical surface, the indentations extending at an acute angle relative to the axial direction of the shaft such that fluid entering the mating cylindrical surfaces is returned by the indentations as the shaft rotates.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile