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:
Dec. 13, 2011
Filed:
Jan. 20, 2011
Thurai Manik Vasagar, Hatfield, PA (US);
Alan D. Mcnickle, Telford, PA (US);
Diane R. Mcnickle, Legal Representative, Telford, PA (US);
Glenn M. Garrison, Perkiomenville, PA (US);
Thurai Manik Vasagar, Hatfield, PA (US);
Alan D. McNickle, Telford, PA (US);
Diane R. McNickle, legal representative, Telford, PA (US);
Glenn M. Garrison, Perkiomenville, PA (US);
Stein Seal Company, Kulpsville, PA (US);
Abstract
The present invention relates to circumferential seal ring segments positioned around a rotating shaft so as to prevent fluids from leaking from a lubricant sump during both low and high pressure conditions. The circumferential seal is comprised of a plurality of adjoining annular ring segments facing the rotating shaft. Each sealing ring segment includes a dead end circumferential groove on a shaft-side face of each sealing ring such that, when the segments are joined, the circumferential dead end groove of each segment extends arcuately in the direction of shaft rotation. At least one additional groove is contained on the shaft-side face of each sealing ring segment. The additional groove(s) directs and creates pressurized air within the dead end circumferential groove, either directly or indirectly maintaining a seal between the ring segments and the shaft. A bleed hole may also be provided to create a seal between each sealing segment.