Small bicycle pump used for sporting events etc., having promotional inscriptions

摘要

The pump assembly consists of an upper part (2), a spring (4), a guide collar (5) and a lower part (8). The upper part has a hole (1) for a fixing ring. A rod (3) which slides in the guide collar has a crimping (7) at its end to prevent its exit. The guide collar has a threaded part (6) which screws into the lower part. The spring between the upper part and the guide collar allows alternate movement of the upper part.