|1. A pumping assembly for use with a pneumatic tire mounted on a tire rim to keep the pneumatic tire from becoming underinflated,
the pumping assembly comprising:
a first pump having a first chamber and a second chamber, an outlet of the second chamber being connected to an inlet of a
second pump, the first pump including a piston placed between the first chamber and the second chamber; and
a check valve being disposed between the second chamber of the first pump and the inlet of the second pump.