Abstract:
An air maintenance tire assembly includes a tire having a tire cavity bounded by first and second sidewalls extending to a tire tread region and air pumping means for generating pressurized air for maintaining air pressure within the tire cavity at a preset pressure level. The air pumping means includes an upper mounting plate fixed to a vehicle rim, a lower mounting plate fixed to the rim and diametrically opposed to the upper mounting plate, a dynamic mass pivotally attached to the upper mounting plate at a first end of the dynamic mass, and a pump fixed to the lower mounting plate and pivotally attached to a second end of the dynamic mass.
Abstract:
A tire inflation apparatus includes a housing coupled for co-rotation with a vehicle wheel, which includes a rim and a tire. The apparatus also includes a pendulum coupled to the housing for relative rotation therewith, a mechanically actuated pump coupled to the housing and operated in response to relative rotation between the housing and the pendulum, a valve positioned downstream of the pump and movable between a closed position in which pressurized air generated by the pump is prevented from being transferred to an air chamber between the rim and the tire, and an open position in which the pressurized air may be transferred to the air chamber, an electrically powered actuator coupled to the valve for moving the valve to at least one of the open and closed positions, and a generator operable to convert rotational kinetic energy of the wheel to electrical energy to power the actuator.
Abstract:
Air compressing tires on a vehicle can utilize tire deformation during vehicle motion to compress a gas. The compressed gas can be discharged from the tire to a pressure regulating vessel on the vehicle. The compressed gas can be stored or used for power generation on board the vehicle. In some cases, the power generated can be used to extend battery power and/or range of an electric vehicle.
Abstract:
A rim mounted control assembly receives therethrough the tire valve stem from an air maintenance tire. A control assembly regulator controls a flow of air to and from a tire-mounted air pumping tube. The control assembly includes a bi-directional air distribution block having multiple parallel air pathways, each air pathway coupled to a respective conduit connected to an air pumping tube mounted within a tire sidewall. The pathways alternatively operate to deliver ambient non-pressurized air to the air pumping tube in response to directional tire rotation against a ground surface.
Abstract:
A pneumatic tire assembly includes: a tire having a pneumatic cavity; a rigid structure for facilitating operation of the tire assembly, the rigid structure being bonded to the tire by a layered thermoplastic material such that a stiffness gradient is created between the structure and the tire; first and second sidewalls extending respectively from first and second tire bead regions to a tire tread region, the first sidewall having at least one bending region operatively bending when radially within a rolling tire footprint; and a sidewall groove defined by groove walls positioned within the bending region of the first tire sidewall, the sidewall groove deforming segment by segment between a non-deformed state and a deformed, constricted state in response to bending of the bending region of the first sidewall while radially within the rolling tire footprint.
Abstract:
A wheel mounted control assembly receives therethrough the tire valve stem from an air maintenance tire. A control assembly regulator controls a flow of air to and from a tire-mounted air pumping tube. The control assembly includes a bi-directional air distribution flow control system having multiple parallel air pathways, each air pathway coupled to a respective conduit connected to an air pumping tube mounted within a tire sidewall. The pathways alternatively operate to deliver ambient non-pressurized air to the air pumping tube in response to directional tire rotation against a ground surface.
Abstract:
An air maintenance system includes a rotating inner ring secured to a vehicle wheel, a stationary outer ring maintaining a constant angular position, an eccentric mass secured to the stationary outer ring, an occlusion roller located proximate to the eccentric mass, and a flexible tube defining a pump cavity. The air maintenance system pumps a fluid from the ambient environment into a pneumatic tire by applying an occluding force against the flexible tube, periodically occluding portions of the pump cavity.
Abstract:
A self-inflating tire assembly includes an air tube connected to a tire and defining an air passageway, the air tube being composed of a flexible material operative to allow an air tube segment opposite a tire footprint to flatten, closing the passageway, and resiliently unflatten into an original configuration. The air tube is sequentially flattened by the tire footprint in a direction opposite to a tire direction of rotation to pump air along the passageway to a regulator device. The regulator device regulates the inlet air flow to the air tube and the outlet air flow to the tire cavity.
Abstract:
A pneumatic tire assembly includes a tire having a pneumatic cavity and a filter disposed between the pneumatic cavity and atmosphere. The filter is constructed of a hydrophobic material for avoiding all liquid adhesion. First and second sidewalls extend respectively from first and second tire bead regions to a tire tread region. The first sidewall has at least one bending region operatively bending when radially within a rolling tire footprint. A sidewall groove is defined by groove walls positioned within the bending region of the first tire sidewall. The sidewall groove deforms segment by segment between a non-deformed state and a deformed, constricted state in response to bending of the bending region of the first sidewall while radially within the rolling tire footprint.
Abstract:
An air maintenance tire assembly includes a tire having a tire cavity to a tire tread region, a pressure control assembly attached to an elongate valve stem projecting from a rim, the pressure control assembly being external to the tire cavity, the elongate valve stem projecting outward from the tire cavity and operative to admit pressurized air into the tire cavity through the pressure control assembly, the first sidewall having an elongate sidewall air passageway therein operatively located to compress segment by segment from an expanded diameter to a substantially reduced diameter responsive to a bending strain introduced into the first sidewall from a rolling tire footprint thereby forcing air, segment by segment, along the air passageway, and a connecting tube connected to the air passageway and the pressure control assembly.