Patent ID: 7025186

Claim:
A bicycle ratchet bushing with an axle rod at a center thereof and the outer-wall coupled to a drum, comprising: a bushing, having a first end a second end opposite to the first end, a ratchet wheel extending from the second end, a limit groove disposed around an external wall of the ratchet wheel, and at least one accommodating groove along the circumference of the ratchet wheel; at least one pawl, having one circular turning end fitting into said accommodating groove, a moveable end with wedge- shaped teeth, and a seam on an outer side of the at least one pawl; a resilient ring, the resilient ring being coupled to the limit groove and being disposed in the seam, such that the resilient ring surrounding the at least one pawl to control expanding the moveable end outside the ratchet wheel and retracting the moveable end into said accommodating groove; a pawl ring circularly sheathed onto a sleeve of said bushing, a plurality of interdental spaces being disposed on an inner wall of said pawl ring and corresponding to the at least one pawl of said ratchet wheel, a buffer space being circularly disposed onto the inner wall of said pawl ring, said buffer space corresponding to an outer wall of said resilient ring, thereby preventing noise produced from contact between the resilient ring and the pawl ring of said bushing.