Piston and magnetic bearing for hydraulic hammer
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United States of America Patent
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Jan 29, 2019
Grant Date -
Apr 27, 2017
app pub date -
Oct 22, 2015
filing date -
Oct 22, 2015
priority date (Note) -
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Abstract
A hydraulic hammer includes a power cell. A work tool is partially received in, and movable with respect to, the power cell. A sleeve is positioned in the power cell that defines a centerline. A piston is concentrically positioned in the sleeve and movable in the sleeve between a first position in contact with the work tool and a second position out of contact with the work tool. A magnetic guide system includes at least one of a first magnetic guide component disposed in the piston and at least one of a second magnetic guide component disposed in the sleeve that interact to produce magnetic repellent forces therebetween to urge the radial position of the piston towards the center line.
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