A pumping assembly (100) is disclosed for use with a pneumatic tire mounted on a tire rim to keep the pneumatic tire from becoming underinflated. The pumping assembly (100) comprises an even number of pumps (150) attached to a tire rim; a gravity mass (130...

A system is disclosed for use with a pneumatic tire (10) mounted on a wheel rim (12) to keep the pneumatic tire (10) from becoming underinflated. The system comprises a plurality of pumps (18) attached circumferentially to a wheel rim (12), each pump (12) ...

The invention refers to a pneumatic tire pressurizing device (1) for automatically pressurizing a load-bearing tire during rotation thereof over a surface, said tire comprising a tire volume comprising compressed air having a predetermined tire pressure. T...