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:
Feb. 28, 2006
Filed:
Apr. 09, 2004
Dimitrios Dardalis, Austin, TX (US);
Dimitrios Dardalis, Austin, TX (US);
Other;
Abstract
A hydrodynamic face sealfor sealing between the cylinder headand rotating sleeveof a rotating liner engine. The face of the face seal provides a sealing zonefor maintaining a lubricant layer of about 2 micrometers between the face seal and the sleeve; and a loading zone. The loading zone includes hydrodynamic lift features such as inclined padsor recessed step pads. Oil is supplied to annular oil supply passagebetween the sealing zone and the loading zone, and flows from the annular oil supply passage to radial passageslocated between the step pads. A spring pre-load is provided to the seal. An outer secondary sealis provided to contain the lubricant. One or more inner secondary seals is provided to contain lubricant and combustion gases. Spiral oil pumping grooves may be provided.