US Patent 8146681 Drilling tool and drilling method
Patent 8146681 was granted and assigned to Hilti on April, 2012 by the United States Patent and Trademark Office.
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Patent abstract
A drilling tool includes a hydraulically driven device (21) for advancing a drilling head (2) in a bore (5), and a flow limiter (30) arranged in a hydraulic conduit (25) of the advancing device (21) for adjusting an advancing speed of the drilling head (2) in the bore (5), with the flow limiter (30) having a pressure-actuated adjusting member (38) for adjusting flow of a hydraulic fluid in the hydraulic conduit means (25) in accordance with a flow volume of a rinsing fluid (7) for rinsing the bore.
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Patent Inventor Names
Kay Heemann0
Uwe Bohn0
Wolfgang Ludwig0
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US Patent 08146681 Drilling tool and drilling method US Patent 8146681 Drilling tool and drilling method
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Patent Number
08146681
Patent Number
8146681
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US Patent 08146681 Drilling tool and drilling method
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Is a
Current assignee
Patent jurisdiction
Patent number
08146681
Date of patent
April 3, 2012
Patent application number
12587914
Date Filed
October 14, 2009
Patent primary examiner
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