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. 17, 1996
Filed:
May. 19, 1995
Josef Sedy, Mount Prospect, IL (US);
Durametallic Corporation, Kalamazoo, MI (US);
Abstract
A non-contacting grooved face seal for a shaft rotating at a high pressure and high speed with a combination of two groove patterns on one of the two sealing faces of mating sealing rings; one pattern being relatively deep angled grooves, and the other pattern begin a relatively shallow annular groove. The relatively deep groove pattern is optimized for hydrodynamic operation and on shaft rotation pumps the sealed fluid between the sealing faces to set the running clearance. The relatively shallow pattern is designed to hydrostatically prevent a friction lock of the sealing faces at starting and stopping of shaft rotation by admitting controlled amount of sealed fluid between the sealing faces when the shaft is at or near to a stationary condition.