Protective helmet

Abstract

A protective helmet has one or more air guiding members configured to place in fluid communication at least one area of the helmet with several ventilation ports for output/expulsion of air to define an area for the passage of air flow independent from, and/or isolated, and/or not in fluid communication with, other areas for the passage of air flows in the helmet.

1 . A protective helmet comprising a first ventilation path or circuit and a second ventilation path or circuit, wherein the first ventilation path or circuit and the second ventilation path or circuit are paths or circuits physically separate or independent from each other, or paths or circuits not in mutual fluid communication, or paths or circuits configured to prevent a mutual interference between air flows. 
     
     
         2 . A protective helmet comprising one or more air guiding members configured to place in fluid communication at least one area of the helmet with one or more ventilation ports for output/expulsion of air so as to define a first ventilation path or circuit intended for the passage of air flow in the helmet, wherein the first ventilation path is independent from, and/or isolated, and/or not in fluid communication with, or not interfering with, a second ventilation path or circuit configured for the passage of another air flow in the helmet. 
     
     
         3 . The protective helmet according to  claim 2 , wherein the first ventilation path or circuit is physically separate from the second ventilation path or circuit. 
     
     
         4 . The protective helmet according to  claim 3 , wherein said one or more guiding members is/are one or more tubular bodies or bodies configured to define a closed cross-section when mounted in the helmet. 
     
     
         5 . The protective helmet according to  claim 2   4 , wherein the at least one area of the helmet is a visor chamber. 
     
     
         6 . The protective helmet according to  claim 2 , wherein the one or more ventilation ports is a rear ventilation port of the helmet. 
     
     
         7 . The protective helmet according to  claim 6 , wherein the at least one area of the helmet is a visor chamber, wherein the first path extends between the visor chamber and said rear ventilation port of the helmet, wherein the second path extends between a front ventilation port and said rear ventilation port of the helmet, and wherein said one or more guiding members are associated with one and/or the other one of said first path or circuit and said second path or circuit. 
     
     
         8 . The protective helmet according to  claim 6 , wherein the at least one area of the helmet is a visor chamber, wherein said one or more tubular bodies are bodies configured to be manipulated individually with respect to a structure of the helmet and one of said first path or circuit and said second path or circuit is defined by said tubular bodies and the other of said first path or circuit and said second path or circuit is defined by holes formed in said structure of the helmet. 
     
     
         9 . The protective helmet according to  claim 8 , wherein said tubular bodies are closed with respect to said holes. 
     
     
         10 . The protective helmet according to  claim 1 , comprising a body of the helmet, wherein the protective helmet further comprises an helmet body, and wherein the first ventilation path or circuit and the second ventilation path or circuit are channels extending in the helmet body each between a respective inlet mouth or opening and a respective outlet mouth or opening. 
     
     
         11 . The protective helmet according  claim 1 , wherein the first ventilation path or circuit and the second ventilation path or circuit are paths included in a same layer of the helmet. 
     
     
         12 . The protective helmet according to  claim 1 , wherein the first ventilation path or circuit and the second ventilation path or circuit are paths covered by an outer shell of the helmet. 
     
     
         13 . The protective helmet according to  claim 12 , further comprising a layer with energy absorption function and wherein both the first ventilation path or circuit and the second ventilation path or circuit extend in the layer with energy absorption function in an area comprised between an intrados side of the layer with energy absorption function and an outer shell of the helmet. 
     
     
         14 . The protective helmet according to  claim 13 , wherein the first ventilation path or circuit and the second ventilation path or circuit both extend between a front area of the helmet and a rear area. 
     
     
         15 . The protective helmet according to  claim 14 , wherein the first ventilation path or circuit has a ventilation function different from the second ventilation path or circuit, and wherein the first ventilation path or circuit is configured to allow demisting of a visor of the helmet, and the second ventilation path or circuit is configured to allow ventilation or airing of a user's head. 
     
     
         16 . The protective helmet according to  claim 8 , further comprising one or more grooves or recesses and wherein said one or more tubular bodies are housed in a respective groove or recess. 
     
     
         17 . The protective helmet according to  claim 12 , wherein said one or more tubular bodies are housed in a respective groove or recess, said groove or recess is formed in said layer with energy absorption function. 
     
     
         18 . The protective helmet according to  claim 1 , further comprising at least one first longitudinally extending groove which extends along the entire top of the helmet between a front area and a rear area of the helmet, and a second groove that branches off on one side of the first groove and is located in a front region of the helmet, said first groove being configured to accommodate a respective tubular body, and said second groove comprising one or more first through-holes configured to provide fluid communication between the front ventilation port and an inner side of the helmet, and wherein the helmet further comprises one or more second through-holes configured to provide fluid communication between the rear ventilation port and an inner side of the helmet. 
     
     
         19 . The protective helmet according to  claim 18 , wherein said one or more front ventilation ports, said one or more first through-holes and said one or more second through-holes and said one or more rear ventilation ports are part of said second ventilation path or circuit second circuit. 
     
     
         20 . A method for managing ventilation in a protective helmet, the method comprising:
 arranging a first ventilation path or circuit and a second ventilation path or circuit, wherein the first ventilation path or circuit and the second ventilation path or circuit are paths or circuits physically separate or independent from each other, or paths or circuits not in mutual fluid communication, or paths or circuits configured to avoid a mutual interference between flows of air, or   directing at least one air flow in a first air circuit of the helmet from an area of the helmet towards one or more ventilation ports for output/expulsion of air independently and/or separately and/or without fluid communication with respect to, or without interfering with, at least one second circuit configured to allow passage of an air flow into the helmet.   
     
     
         21 . The method according to  claim 20 , wherein an air flow which extends from the visor chamber towards the ventilation port for output of air is configured to be independent, or isolated, from another flow, wherein one of said flows is configured to be conveyed in one or more tubular bodies or bodies configured to form a closed cross-section once mounted in the helmet and the other of said flows is configured to be conveyed in holes formed in a layer with energy absorption function, said tubular bodies or bodies configured to form a closed cross-section once mounted in the helmet being bodies which are structurally independent or singly able to be maneuvered with respect to said layer with energy absorption function. 
     
     
         22 . The method according to  claim 20 , wherein an air flow, which extends from the visor chamber towards the ventilation port for output of air for demisting the visor is configured to be independent from, or is isolated with respect to, an air flow extending between a front ventilation port and said ventilation port for output of air and configured to air an internal area of the helmet intended to accommodate the head of a user. 
     
     
         23 . The method according to  claim 22 , wherein the air is made to exit from a rear area of the helmet via the two independent paths. 
     
     
         24 . The method according to  claim 23 , wherein the first ventilation path or circuit and the second ventilation path or circuit convey air flows with a different function inside the helmet.