Pumping device, particularly for sports shoes, and method for manufacture thereof

摘要

Method for manufacturing pumping devices, particularly usable in sports shoes, including the monolithic molding of a body having at least one tubular passage and a first and a second seat for air venting and intake valves. The body furthermore includes at least one chamber with a partially open elastically deformable wall. The method entails the closure of the chamber, whereas the valves and at least one inflatable plenum chamber are associable within the body thus obtained, before closing it. The pumping device thus obtained has optimum functional characteristics as well as very low manufacturing costs.