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:
Aug. 16, 2011
Filed:
Sep. 25, 2008
Thomas E. Oertley, Peoria, IL (US);
Gregory J. Kaufmann, Metamora, IL (US);
Robert L. Meyer, Metamora, IL (US);
Dennis R. Shookman, Washington, IL (US);
Thomas E. Oertley, Peoria, IL (US);
Gregory J. Kaufmann, Metamora, IL (US);
Robert L. Meyer, Metamora, IL (US);
Dennis R. Shookman, Washington, IL (US);
Caterpillar Inc., Peoria, IL (US);
Abstract
A rotary cutter for a tunnel boring machine or similar machine has a cutter ring mounted to a hub. The hub is mounted on a shaft. A sleeve bearing system is positioned between the hub and the shaft for supporting the hub on the shaft and allowing relative rotation. A duo-cone seal assembly is positioned between the hub and the shaft to seal out contaminants from the sleeve bearing system. An oil gallery with lubricating oil for lubricating the sleeve bearing system is provided in the shaft.