Auto-lubrication system for a work tool
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United States of America Patent
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Jun 16, 2020
Grant Date -
Jun 20, 2019
app pub date -
Dec 19, 2017
filing date -
Dec 19, 2017
priority date (Note) -
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Abstract
A lubrication system including a drive fluid chamber and a lubricant chamber. A first movable member is movable from a first position to a second position within the drive fluid chamber in response to drive fluid pressure acting on the first movable member. A second movable member is movable between a first position and a second position within the lubricant chamber and is operatively coupled to the first movable member. A biasing member is positioned to bias the first movable member toward the first position. A relief valve is associated with the first movable member and, when the relief valve in an open state, the drive fluid pressure acting on the first movable member is reduced such that the biasing member moves the first movable member to the first position within the drive fluid chamber.
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