Patent ID: 8177251
Filing Date: 2012-05-15
Classification: B62J

Abstract:
1. A bicycle seatpost assembly comprising: a first tube having a first end and a second end; a second tube having a first end and a second end, with the first end of the second tube being open such that the second end of the first tube being telescopically disposed in the first end of the second tube; a floating piston disposed in an interior bore of the first tube and forming a gas chamber disposed between the floating piston and the first end of the first tube; a valve unit immovably disposed with respect to the second tube and dividing the interior bore of the first tube into a first fluid chamber and a second fluid chamber, with the first fluid chamber being disposed between the valve unit and the floating piston, the second fluid chamber being disposed between the valve unit and the second end of the first tube, the valve unit including a first check valve and a second check valve, the first check valve being arranged to block fluid flow from the first fluid chamber to the second fluid chamber and permit fluid flow from the second fluid chamber to the first fluid chamber, the second check valve being arranged to block fluid flow from the second fluid chamber to the first fluid chamber and permit fluid flow from the first fluid chamber to the second fluid chamber; and a flow control part movably arranged with respect to the first and second check valves such that fluid flows from the second fluid chamber to the first fluid chamber through the first check valve when the flow control part is in a first position, and such that fluid flows from the first fluid chamber to the second fluid chamber through the second check valve when the flow control part is in a second position.