Nicholas A Marafino

US Patent:

20070110589, May 17, 2007

Filed:

Nov 17, 2005

Appl. No.:

11/281231

Inventors:

Nicholas Marafino - Philadelphia PA, US

International Classification:

F04B 17/06

US Classification:

417231000

Abstract:

An air pump is integrated, in at least in part, in a seat tube of a frame of a bicycle. A flange is interposed between a seat post and the seat tube. The flange is secured to the seat post in a sliding abutment relationship with the seat tube. A seal located in a lower portion of the seat tube provides an air closure (i.e. an air seal). Hollow space between the flange and the seal in the seat tube form an air chamber for the air pump. A vent hole passes through the seat tube proximal to the air chamber. When the seat post is slid in a downward direction into the seat tube air is pressurized within the air chamber for expulsion through the vent hole.