Device for communication between pressurized zone of tire and air supply circuit in lorry, has opening and closing device including ball to be pressed on support cone to close air supply circuit when subjected to gravitational forces

摘要

The device has an opening and closing device (32) for opening and closing a communication between an air supply circuit (25) and a pressurized zone (31) of a pneumatic tire. The opening and closing device includes a freely rotating ball (33) intended to be pressed on a support cone (34) to close the air supply circuit when subjected to gravitational forces and or with differential pressures between the pressurized zone of the tire and the air supply circuit. A pneumatic jack includes a piston (22) separating two compartments (23, 24).