Patent ID: 7322645

Claim:
A bicycle seat mounting system comprising a bicycle seat rail clamping shaft comprising a generally cylindrical shaft having a left seat rail slot transverse to the longitudinal axis of said clamping shaft near one end of said clamping shaft and a right seat rail slot spaced and parallel to said left seat rail slot at the opposite end of said shaft, said cylindrical shaft having a transverse sliding shaft bore near the longitudinal midpoint of said shaft and said sliding shaft bore sized to slidingly receive within it a sliding shaft, said sliding shaft having a sliding shaft transverse receiving bore near its lower end to receive and rotatably retain a sliding shaft pivot pin, said sliding shaft pivot pin having a threaded sliding shaft pivot pin bore transverse at or near said pivot pin's longitudinal midpoint and threaded to receive an angular adjustment screw, said sliding shaft having an angular adjustment screw slot at the bottom of said sliding shaft that extends partially upwards along the axis of said sliding shaft towards its opposite end, said sliding shaft transverse receiving bore is perpendicular to the plane of said screw slot, a head shell assembly having a head shell interior cavity, said head shell interior cavity having two spaced and parallel inside head shell walls that near their upper edges are perpendicularly intersected by two head shell transverse coaxial bores sized to receive and rotatably retain within them said bicycle seat rail clamping shaft, said head shell assembly including two head shell angular adjustment screw coaxial bores below said head shell transverse coaxial bores and perpendicular to the axis of said coaxial bores that are sized to receive and rotatably retain said angular adjustment screw that extends through them, said angular adjustment screw having a knob at one end, said angular adjustment screw passing through said head shell angular adjustment screw coaxial bores and said threaded sliding shaft pivot pin bore and retained in said head shell angular adjustment screw coaxial bores by a lock nut at the other end of said screw from said knob, and a flared portion at the lower end of said head shell assembly near a male coupling portion.