Device for adjustment of pressure in tires

A device for adjustment of pressure in tires, comprising

• a chamber having deformable walls at least partially defining the chamber, the walls having a shape memory, and
• an arrangement with ports interconnected with a fluid source and a tire internal space, where a first port of the ports is fitted with a valve, a second port of the ports is connected to the chamber, and a third port of the ports is interconnected with a closure element, wherein an auxiliary one-way valve is placed between the arrangement and the chamber, and wherein the arrangement permits fluid flow from the fluid source to the tire internal space without passing through the third port.

A device for adjustment of pressure in tires, comprising

• a chamber having walls at least partially defining the chamber, the walls having a shape memory, and
• an arrangement with ports interconnected with a fluid source and a tire internal space, where a first port of the ports is fitted with a valve, a second port of the ports is connected to the chamber, and a third port of the ports is interconnected with a closure element,
• wherein a length of the chamber in a direction of tire rotation equals 0.001 to 0.5 multiplied by a perimeter of the tire, where a ratio of a volume of the chamber before deformation to a volume of the chamber during deformation is at least as high as a ratio of a desired tire pressure to a pressure of the fluid source, wherein the arrangement permits fluid flow from the fluid source through the chamber to the tire internal space without passing through the third port, and wherein, when the third port is open, the first port is closed.

A device for adjustment of pressure in tires, comprising

• a chamber having deformable walls at least partially defining the chamber, the walls having a shape memory, and
• an arrangement with ports interconnected with a fluid source and a tire internal space, where a first port of the ports is fitted with a valve, a second port of the ports is connected to the chamber, and a third port of the ports is interconnected with a closure element,
• wherein the closure element is arranged to close or open the third port depending upon a change in pressure, wherein the arrangement permits fluid flow from the fluid source through the chamber to the tire internal space without passing through the third port, and wherein the closure element comprises a member with a shape matching an opening in a wall of the chamber.

A tire or a rim fitted with a device for adjustment of pressure, comprising a chamber defined by deformable walls that have a shape memory, and an arrangement with ports interconnected with a fluid source and a tire internal space, where a first port of the ports is fitted with a valve, a second port of the ports is connected to the chamber, and a third port of the ports is interconnected with a closure element, wherein the arrangement permits fluid flow from the fluid source through the chamber to the tire internal space without passing through the third port, and wherein, when the third port is open, the first port is closed.

A tire or a rim fitted with a device for adjustment of pressure in tires, comprising a chamber having walls at least partially defining the chamber, the walls having a shape memory, and an arrangement with ports interconnected with a fluid source and a tire internal space, where a first port of the ports is fitted with a valve, a second port of the ports is connected to the chamber, and a third port of the ports is interconnected with a closure element, wherein a length of the chamber in a direction of tire rotation equals 0.001 to 0.5 multiplied by a perimeter of the tire, where a volume of the chamber before deformation to volume of the chamber during deformation ratio is the same or higher than a desired tire pressure to pressure of the fluid source ratio, wherein the arrangement permits fluid flow from the fluid source through the chamber to the tire internal space without passing through the third port, and wherein, when the third port is open, the first port is closed.

A tire or a rim fitted with a device for adjustment of pressure, comprising a chamber defined by deformable walls that have a shape memory, and an arrangement with ports interconnected with a fluid source and a tire internal space, where a first port of the ports is fitted with a valve, a second port of the ports is connected to the chamber, and a third port of the ports is interconnected with a closure element, and wherein the arrangement permits fluid flow from the fluid source to the tire internal space without passing through the third port, wherein an auxiliary one-way valve is placed between the arrangement and the chamber.

A device for adjustment of pressure in tires, comprising:

• an arrangement having an interior volume in flow communication with a first port in flow communication with a fluid source, a second port in flow communication with a tire internal space to be pressurized, and a third port between the interior volume of the arrangement and the fluid source;
• a closure element arranged to open flow communication between the first port and the third port through the arrangement so that fluid flows from the fluid source through the first port and to the third port without flowing through the second port when pressure in the tire internal space is above a threshold pressure and to close flow communication between the first port and the third port through the arrangement when pressure in the tire internal space is below the threshold pressure.