Patent ID: 7380763

Claim:
A seat height adjusting device mounted on at least one of a front end portion and a rear end portion of a seat that has a seat frame and is supported by a seat support, the seat height adjusting device comprising: a first bracket and a second bracket spaced away from each other, one of the first and second brackets being joined to the seat frame; an arm disposed between the first and second brackets and having one end pivotally mounted on the first bracket and the other end pivotally mounted on the seat support; a spur gear operable to rotate the arm; a first latch and a second latch both engageable with the spur gear; and a handle rotatably mounted on one of the first and second brackets; wherein when the seat is raised, the handle is operated to intermittently engage the first latch with the spur gear, thereby rotating the spur gear in a first direction to drive the arm; wherein when the seat is lowered, the handle is operated to intermittently engage the second latch with the spur gear, thereby rotating the spur gear in a second direction counter to the first direction to drive the arm; and wherein a worm is rotatably disposed between the first and second brackets, a first helical gear is secured to the arm and held in engagement with the worm, and a second helical gear is joined to the spur gear and held in engagement with the first helical gear, wherein the arm is driven via the first and second helical gears by rotating the spur gear.