Patent ID: 8459682

Claim:
A cartridge retention structure for removably securing a power cell cartridge within an axial hollow region of a seat post, comprising: a generally cylindrical body of a dimension and size for securable insertion into said axial hollow region in said seat post, said body defining a hollow opening therein, said body having defined in a radially inside surface and at a distal end thereof a shoulder to form a stop for a power cell cartridge that may be inserted within said cylindrical body; a generally cylindrical power cell cartridge having a first region with diameter sized for removable insertion from said proximal end of said body into said hollow opening of said body, said power cell cartridge defining a hollow opening therein, said cartridge having defined in a radially outside surface and at a proximal end thereof a shoulder to form a stop for engaging said stop defined in said body; and a cap structure securable within said hollow opening of said power cell cartridge at a proximal end thereof, said cap structure having a longitudinal opening therein through which lead wires from a power cell disposed within said hollow opening of said cartridge may extend.