Device for adjustment of pressure in tires

Abstract

A device for adjustment of pressure in tires includes a chamber with shape memory and a valve. The valve is a three-way valve with inputs interconnected with the external environment and the tire internal space, where one input is fitted with a valve, the next input is connected to one end of the chamber with shape memory, and the last input is interconnected with the closure element. The device for adjustment of pressure in tires includes the chamber with shape memory interconnected with the external environment through an input and with the tire chamber through an output and fitted with at least one valve. The length of the chamber in the direction of tire rotation equals 0.001 to 0.5 of the tire perimeter, where the volume of the chamber before deformation to volume of the chamber during deformation ratio is the same or higher then the desired tire pressure to pressure of the external environment ratio.

1 . A device for adjustment of pressure in tires, comprising
 a chamber with shape memory, and   a valve comprising a three-way valve with inputs interconnected with the external environment and the tire internal space, where one input is fitted with a valve, a next input is connected to the chamber with shape memory, and a last input is interconnected with a closure element.   
     
     
         2 . A device according to the  claim 1 , wherein one input of the three-way valve fitted with a valve is interconnected with the external environment, the next input connected to the chamber with shape memory is interconnected with the tire internal space by means of the chamber, and the last input with a closure element is interconnected with the tire internal space. 
     
     
         3 . A device according to the  claim 1 , wherein one input of the three-way valve fitted with a valve is interconnected with the tire internal space, the next input connected to the chamber with shape memory is interconnected with the external environment by means of the chamber, and the last input with a closure element is interconnected with the external environment. 
     
     
         4 . A device according to  claim 1 , wherein an auxiliary one-way valve s placed between the three-way valve and chamber with shape memory. 
     
     
         5 . A device according to  claim 1 , wherein the length of the chamber is longer than the undeformed part of the tire at the chamber's location. 
     
     
         6 . A device for adjustment of pressure in tires, comprising
 a chamber with shape memory interconnected with the external environment through an input and with the tire chamber through an output and fitted with at least one valve, wherein the length of the chamber in the direction of tire rotation equals 0.001 to 0.5 of the tire perimeter, where the volume of the chamber before deformation to volume of the chamber during deformation ratio is the same or higher then the desired tire pressure to pressure of the external environment ratio.   
     
     
         7 . A device according to the  claim 6 , wherein the input of the chamber is fitted with a valve and the output of the chamber is interconnected with a closure element. 
     
     
         8 . A device according to the  claim 6 , wherein the output of the chamber is fitted with a valve and the input of the chamber is interconnected with a closure element. 
     
     
         9 . A device according to  claim 6 , wherein a closure element comprises a member with the shape matching the opening in a wall of the chamber connected to another wall of the chamber or another part of a tire and/or rim. 
     
     
         10 . A device according to  claim 1 , wherein the closure element comprises an element with reference pressure and/or spring and/or membrane and/or piston and/or electronic element for closing the input of the three-way valve or input and/or output of the chamber. 
     
     
         11 . A device according to  claim 1 , wherein the closure element has freedom of movement only in a direction perpendicular to centrifugal forces on the tire and/or a direction parallel to a rotation axis of the tire. 
     
     
         12 . A device according to  claim 1 , wherein the closure element is fitted with a mechanism for setting a distance of the closure element from an input of the three-way valve or from an input or an output of the chamber and/or discharge hole. 
     
     
         13 . A device according to  claim 1 , wherein the chamber is interconnected with an accumulator that is interconnected with a tire internal space. 
     
     
         14 . A tire and/or rim fitted with a device according to  claim 1 . 
     
     
         15 . A tire and/or rim fitted with a device according to  claim 6 .