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US Patent 7497274 Hydraulic fluid tank for drilling machine

Patent 7497274 was granted and assigned to ASTEC INDUSTRIES, INC. on March, 2009 by the United States Patent and Trademark Office.

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Patent
Patent
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Patent attributes

Current Assignee
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ASTEC INDUSTRIES, INC.
1
Patent Jurisdiction
United States Patent and Trademark Office
United States Patent and Trademark Office
1
Patent Number
74972741
Patent Inventor Names
Neil M. Baker1
Christopher L. Shepherd1
Guy P. Randall1
Date of Patent
March 3, 2009
1
Patent Application Number
113381961
Date Filed
January 24, 2006
1
Patent Primary Examiner
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Jennifer H Gay
1
Patent abstract

A hydraulic fluid tank for a drilling machine includes a primary chamber and a secondary chamber. The primary chamber is located entirely below the hydraulic pump of the drilling machine, and the secondary chamber is located above and in fluid communication with the primary chamber. The secondary chamber is adapted to maintain a hydraulic fluid level that is above the pump suction centerline of the drilling machine pump as the hydraulic fluid in the tank reaches its normal operating temperature during operation of the drilling machine. The secondary chamber is also sized and configured to allow for thermal expansion of hydraulic fluid in the amount of at least about 5% of the total tank volume as the hydraulic fluid in the tank reaches its normal operating temperature during operation of the drilling machine.

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