Linear actuator for adjusting the vertical position of a spring of a damper and spring unit for a vehicle suspension and damper and spring unit for a vehicle suspension comprising such an actuator
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United States of America Patent
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-
Dec 5, 2017
Grant Date -
Jun 9, 2016
app pub date -
Dec 1, 2015
filing date -
Dec 4, 2014
priority date (Note) -
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status (Latency Note)
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Abstract
A damper with a cylinder and a rod, a spring arranged around the damper and a linear actuator arranged to change in a controlled manner the axial position of a bottom end of the spring relative to the cylinder of the damper. The actuator comprises an inner cylindrical element arranged to be mounted around the cylinder of the damper, an outer cylindrical element, which is mounted so as to be axially slidable relative to the inner cylindrical element and is arranged to support the bottom end of the spring, and a working chamber arranged to be filled with a fluid under pressure to adjust the axial position of the outer cylindrical element relative to the inner cylindrical element. The working chamber is delimited, both radially and axially, only by the inner cylindrical element and by the outer cylindrical element. The outer cylindrical element is provided with a support flange arranged to support the bottom end of the spring.
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