Telescopic bicycle seat post system

A telescopic bicycle seat post system, comprising:

• a bicycle frame having a seat tube, the seat tube of the bicycle frame having an upper opening therein adapted for receiving a seat post of a bicycle seat therein;
• said seat tube having a generally C-shaped seat post clamp mounted thereto adjacent said upper opening of said seat tube adapted for securing a seat post inserted into said upper opening of said seat tube;
• a telescopic seat post assembly comprising:
• tubular upper and lower elongate members each having opposite upper and lower ends;
• said upper end of said lower elongate member telescopically receiving therein said lower end of said upper elongate member to permit selective telescopic extension and retraction of said upper elongate member from said upper end of said lower elongate member;
• said lower end of said lower elongate member being inserted into said upper opening of said seat tube;
• said upper end of said upper elongate member having a bicycle seat coupled thereto;
• wherein said upper end of said upper elongate member has a seat mounting clamp coupled thereto, said seat mounting clamp coupling said bicycle seat to said upper end of said upper elongate member;
• said seat post clamp being disposed around said lower elongate member for securing said lower elongate member in said seat post;
• said lower elongate member having an inner surface defining a lumen of said lower elongate member, said inner surface of said lower elongate member having upper and lower regions, and a shoulder formed between said upper and lower regions of said inner surface of said lower elongate member;
• said lower end of said upper elongate member having a stop coupled thereto and disposed in a lower space defined by said lower region of said inner surface of said lower elongate member;
• said upper elongate member being slidable out of said upper end of said lower elongate member until said stop abuts said shoulder to prevent further removal of said upper elongate member from said lower elongate member;
• wherein said upper and lower elongate members are generally cylindrical in shape;
• wherein said upper and lower regions of said inner surface of said lower elongate member are generally cylindrical in shape, said lower region of said inner surface of said lower elongate member having a diameter greater than a diameter of said upper region of said inner surface of said lower elongate member to define said shoulder of said inner surface of said lower elongate member;
• said shoulder being generally ring-shaped;
• wherein said stop of said upper elongate member is generally disk-shaped and has an outer diameter greater than said diameter of said upper region of said inner surface of said lower elongate member;
• a generally c-shaped extension clamp being disposed around said lower elongate member adjacent said upper end of said lower elongate member, said extension clamp being adapted for holding said upper elongate member in a fixed position with respect to said lower elongate member;
• said extension clamp having a pair of opposing ends each having an outwardly extending tab;
• a threaded pinch bolt being extended through said tabs to connect said tabs together;
• wherein advancing said pinch bolt in a first direction moves said tabs close to one another to constrict said extension clamp around said upper end of said lower elongate member and an adjacent portion of said upper elongate member to hold said upper elongate member in a fixed position with respect to said lower elongate member;
• wherein advancing said pinch bolt in a second direction opposite said first direction moves said tabs away from one another to loosen said extension clamp from around said upper end of said lower elongate member to permit sliding of said upper elongate member in and out of said lower elongate member;
• said extension clamp having a generally C-shaped upper edge, said upper edge of said extension clamp having an inwardly radiating resting flange, said resting flange resting on said upper end of said lower elongate member to position said extension clamp adjacent said upper end of said lower extension member;
• said resting flange having an inner edge defining an inner radius of said resting flange;
• said upper end of said lower elongate member having inner and outer radii, said inner radius being defined by said upper region of said inner surface of said lower elongate member and said outer radius being defined by an outer surface of said lower elongate member;
• and
• said inner radius of said resting flange being equal to the sum of said inner radius of lower elongate member plus one-half the difference between said inner and outer radii of said lower elongate member;
• said upper elongate member having an outer surface, said outer surface of said upper elongate member of said upper elongate member having an indicator line displayed therearound between said upper and lower ends of said upper elongate member for indicating a predetermined minimum insertion length between said indicator and said lower end of said upper elongate member at which said upper elongate member should be inserted into said upper end of said lower elongate member;
• and
• said outer surface of said lower elongate member having a mounting indicator line displayed therearound between said upper and lower ends of said lower elongate member for indicating a predetermined minimum insertion length between said mounting indicator line an said lower end of said lower elongate member at which said lower elongate member should be inserted into said upper opening of said seat tube of said bicycle frame.

A telescopic bicycle seat post system, comprising:

• a bicycle frame having a seat tube, the seat tube of the bicycle frame having an upper opening therein;
• a telescopic seat post assembly comprising:
• tubular upper and lower elongate members each having opposite upper and lower ends;
• said upper end of said lower elongate member telescopically receiving therein said lower end of said upper elongate member to permit selective telescopic extension and retraction of said upper elongate member from said upper end of said lower elongate member for a providing a first seat post adjustment;
• said lower end of said lower elongate member being telescopically received in said upper opening of said seat tube to permit selective telescopic extension and retraction of said lower elongate member from said seat tube for a providing a second seat post adjustment;
• a seat post clamp mounted to said seat tube adjacent said upper opening of said seat tube for selectively fixing the protrusion of said lower elongate member from said seat tube;
• an extension clamp disposed around said lower elongate member adjacent to said upper end of said lower elongate member, said extension clamp being adapted for selectively fixing the protrusion of said upper elongate member from the upper end of said lower elongate member;
• said upper elongate member having an outer surface, said outer surface of said upper elongate member having an indicator line displayed therearound between said upper and lower ends of said upper elongate member for indicating a predetermined minimum insertion length between said indicator and said lower end of said upper elongate member at which said upper elongate member should be inserted into said upper end of said lower elongate member;
• and
• an outer surface of said lower elongate member having a mounting indicator line displayed therearound between said upper and lower ends of said lower elongate member for indicating a predetermined minimum insertion length between said mounting indicator line an said lower end of said lower elongate member at which said lower elongate member should be inserted into said upper opening of said seat tube of said bicycle frame.