Patent ID: 6557878
Filing Date: 2003-05-06
Classification: B62J,B62K

Abstract:
A locking device adapted to releasably lock a seat post relative to a seat tube if a bicycle frame, comprising:a tubular body including a lower surrounding member adapted to be secured to the seat tube, and an upper surrounding member extending upwardly in an axial direction from said lower surrounding member, terminating at an upper surrounding edge, and having an outer surrounding wall surface, an inner surrounding wall surface opposite to said outer surrounding wall surface in radial directions and confining an accommodating space of such a dimension as to accommodate the seat post via insertion therein from said upper surrounding edge, and a slit extending downwardly from said upper surrounding edge towards said lower surrounding member, and outer surrounding wall surface including right and left lateral edge portions which are spaced apart from each other in a transverse direction relative to the axial direction to define said slit, said upper surrounding member further having a plurality of protuberances disposed on said inner surrounding wall surface and angularly displaced from each other, each of said protuberances extending axially and projecting radially and inwardly of said inner surrounding wall surface so as to be adapted to abut against the seat post when the seat post is received in said accommodating space; right and left jaw members respectively attached on said right and left lateral edge portions, and movable toward each other in the transverse direction to narrow said slit so as to bring said protuberances to abut against the seat post; and a tightening member disposed to releasably move said right and left jaw members toward each other in the transverse direction.