US Patent 10292502 Foldable chair

A foldable chair includes a seat panel having a first end portion and a second end portion, a pivotable support having a first end portion and a second end portion, the first end portion of the pivotable support pivotally connected to the first end portion of the seat panel, and a variable resistance support assembly pivotally coupled to the second end portion of the seat panel for selectively raising and lowering the seat panel. The variable resistance support assembly can include a housing, with a first spring and a second spring stored therein. The first spring can have a first pressure load and the second spring can have a second pressure load that is less than the first pressure load.