US Patent 11439235 Seat tilting system

A seat tilting device includes: a bottom plate secured to a seat base; a top plate secured to a seat; a pivot connecting the top plate to the bottom plate; a compression spring surrounding the pivot; and a compression ring surrounding the compression spring, wherein there is space between a bottom surface of the top plate and a top surface of the compression ring such that the top plate may tilt on the pivot until it contacts the top surface of the compression ring and the movement of the top plate is resisted by the compression spring.