Patent ID: 9259981
Filing Date: 2016-02-16
CPC Classification: B29D,B60C,Y10T

Claim Text:
1. An air maintenance tire assembly comprising: a tire having a tire cavity bounded by first and second sidewalls extending to a tire tread region; air pumping means for generating pressurized air for maintaining air pressure within the tire cavity at a preset pressure level; the tire having an elongate valve stem projecting outward from the tire cavity and operative to admit pressurized air into the cavity through a valve stem internal air passageway; an elongate shaft having an longitudinal axis, the shaft reciprocally moveable axially within the valve stem internal air passageway between a passageway-opening axial position and a passageway-closing axial position; a pressure regulator operative to move the elongate shaft axially between the passageway-opening and passageway-closing positions responsive to a detected air pressure level within the tire cavity; wherein the pressure regulator comprises: a pressure measuring sensor for measuring a tire cavity pressure level; transmission means for transmitting a control signal responsive to the measured tire cavity pressure level; and valve means for moving the elongate shaft axially between the passageway-opening and passageway-closing positions responsive to the control signal.