Spring cartridge assembly with low oil level for bicycle dropper post
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United States of America Patent
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Jul 2, 2024
Grant Date -
Oct 12, 2023
app pub date -
Oct 3, 2022
filing date -
Apr 10, 2022
priority date (Note) -
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Abstract
A dropper post may include an outer tube and an inner tube slidable relative to the outer tube between an extended position and a retracted position. A spring cartridge may include an axially extending cylinder containing a combination of a liquid and a gas and having a sliding surface and a piston with a sealing portion dividing the cylinder interior to provide a first chamber and a second chamber. Moving the inner tube toward the retracted position expands the first chamber. When inner tube is in the extended position the sealing portion is at least partially submerged in the liquid, the second chamber contains a layer of the gas above a layer of the liquid and the first chamber contains the liquid and when the inner tube is in the retracted position the first chamber contains the liquid and a layer of gas between the liquid and the sealing portion.
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