Pneumatic inflation system for tyre-changing machines

Abstract

The improvement in a pneumatic inflation system for tyre-changing machines ( 1 ) provides that between a pressurised fluid supply organ ( 2 ) and a delivery organ ( 3 ) of the fluid, at least one limiter valve ( 4 ) of the fluid supply is located, which intercept valve ( 4 ) can limit the fluid delivery to at least two maximum pressure values, which values are different one to another and which are alternatively selectable by a user.

1 ). An improvement in a pneumatic inflation system for tyre-changing machines ( 1 ) characterised in that, located between a pressurised fluid supply source and a delivery organ ( 3 ) of the pressurised fluid, at least one intercepting limiter valve ( 4 ) of pressurised fluid delivery is comprised, the limiter valve ( 4 ) offering at least two maximum possible values of fluid pressure, which maximum values are different one from another and which are alternatively selectable by a user.  
     
     
         2 ) The improvement in a pneumatic inflation system for tyre-changing machines of  claim 1 , characterised in that the two maximum possible values are preset and are selectable continuously, from the lower of the two maximum possible values up to the higher of the two maximum values, and vice versa.  
     
     
         3 ) The improvement in a pneumatic inflation system for tyre-changing machines of  claim 1 , characterised in that the two maximum possible values are preset and are selectable discontinuously, the values being set at either the lower of the two maximum possible values or at the higher of the two maximum values, and vice versa.  
     
     
         4 ) The improvement in a pneumatic inflation system for tyre-changing machines of any one of the preceding claims, characterised in that the said two maximum possible values are preset, for the lower one, at a value comprised between 3.5 and 4.5 bar, and for the higher one, at a value comprised between 5.5 and 6.5 bar.  
     
     
         5 ) The improvement in a pneumatic inflation system for tyre-changing machines ( 1 ) of any one or more than one of the preceding claims, characterised in that the limiter valve ( 4 ) is provided with a handle ( 5 ,  6 ) for selecting between the lower value and the higher value and vice versa, the handle being grippable by a user.  
     
     
         6 ) The improvement in a pneumatic inflation system for tyre-changing machines ( 1 ) of  claim 5 , characterised in that the limiter valve ( 4 ) is provided with a graduated pressure gauge ( 7 ) for observation.