Patent ID: 8302983
Filing Date: 2012-11-06
Classification: B62J

Abstract:
1. A bicycle seat tube assembly comprising: an outer tube being a hollow tube and having a first end cap sealing a first end of the outer tube; an inner tube being a hollow tube and having a first end thereof inserted into the outer tube, the inner tube being movable linearly in the outer tube, a second end of the inner tube connected with a clamp unit; a valve unit having a first end fixed to the first end cap and a second end of the valve unit inserted into the inner tube and defining an interior space of the inner tube into a first oil room and a second oil room, the valve unit regulating volume of oil flowing between the first and second oil rooms, the inner tube linearly movable between the outer tube and the valve unit, and a restriction unit having a flange extending inward from an inner periphery of the inner tube, a stop member located on the valve unit, the stop member contacting the flange when the inner tube moves to a position so as to restrict the inner tube from dropping out from the outer tube.