Stool Chair
How does an adjustable piston stool/ office chair work?
Hi,
Can anyone tell me or, even better, tell me a link which shows how the piston on a office chair adjusts the height? I need this for my product design school course.
Thanks.
It is a gas cylinder that has an internal piston that compresses a gas to a higher pressure when weight is put on it. A friction clamp to hold the piston's rod in a set position is the height selector. A soft spring gives a bit of cushion when a person sits on the chair. If the chair is too low, a lever releases the friction clamp, letting the piston come up, raising the chair against the chair's weight. If a person is sitting in the chair at that time, the gas pressure against the piston is not enough, and the chair goes down.
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