Feed chain automatic tensioner
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United States of America Patent
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-
Sep 18, 2012
Grant Date -
Sep 15, 2011
app pub date -
Mar 11, 2010
filing date -
Mar 11, 2010
priority date (Note) -
In Force
status (Latency Note)
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Abstract
An automatic tensioning system for a chain drive system of a rock drill assembly is disclosed. A hydraulic cylinder is coupled to one end of the feed channel of a rock drill assembly. When pressurized hydraulic fluid is provided to the hydraulic cylinder, a plunger within the hydraulic cylinder pulls on a tensioner sprocket, which in turn provides tension to the chain of the chain drive system. This allows for a constant tension to be applied to the chain throughout a long duration of operation as opposed to a manually adjusted chain drive system in which the chain tension varies during operation in between manual adjustments.
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