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US Patent 7997659 Rotary cutter for tunnel boring machine

Patent 7997659 was granted and assigned to Caterpillar Inc. on August, 2011 by the United States Patent and Trademark Office.

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Patent attributes

Current Assignee

Caterpillar Inc.

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Patent Jurisdiction

United States Patent and Trademark Office

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Patent Number

Patent Inventor Names

Thomas E. Oertley0

Dennis R. Shookman0

Gregory J. Kaufmann0

Robert L. Meyer0

Date of Patent

August 16, 2011

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Patent Application Number

122383720

Date Filed

September 25, 2008

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Patent Primary Examiner

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Patent 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.

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