Bicycle pump apparatus

Bicycle pump/seat post apparatus including a cylinder portion, a piston portion, a handle portion, a seat mounting portion and an air discharge portion;

• said cylinder portion including an elongated tubular seat post section, said tubular section having an external diameter slidably engageable snugly with a seat post receiving section of a bicycle frame;
• said piston portion including an elongated rod member disposed within said tubular section along a centerline thereof, said rod member having a length slightly longer than said tubular section, a transverse plunger member affixed adjacent one end of said rod member, said plunger member having a diameter substantially equal to the internal diameter of said tubular section to provide a snug fit therebetween, a transverse guide section disposed adjacent an opposite end of said tubular section aligning and maintaining said rod member along the centerline thereof;
• said handle portion including a grip member connected to an end of said rod member that extends outwardly beyond said guide section, said grip member having an exterior diameter not more than that of the external diameter of said tubular section;
• said seat mounting portion including a central section engageable with an end of said tubular section remote from said handle portion, a passage through said central section, flange sections extending from said central section connectable with an underside of a bicycle seat;
• said air discharge portion including a length of flexible tubing, one end of said tubing being attached to an end of said mounting portion passage remote from said cylinder portion, an opposite end of said tubing including a fitting connectable to a tire valve;
• whereby said pump/seat post apparatus can be secured within said seat post receiving section of a bicycle frame and a seat affixed to said seat mounting portion with said tubing within said seat, and said pump apparatus can be used to inflate a tire by withdrawing same from said frame section and inverting it, positioning said apparatus adjacent said tire resting on said seat as a base, attaching said fitting to a tire valve and reciprocating said piston portion to force air along said tubing into said tire.