Advanced helmet including a sub-shell with an outer shell attached thereto

Abstract

A protection helmet is provided which includes a main outer shell having a longitudinal symmetry plane (P), a head band and a chin strap. The helmet also includes a sub-shell on which the main outer shell is secured.

1 . A safety helmet comprising a main outer shell of longitudinal plane of symmetry, a head band, and a chin strap, wherein said helmet comprises an inner helmet shell on which is attached the main outer shell. 
   
   
       2 . The safety helmet as set forth in  claim 1 , wherein the inner helmet shell has the form of a substantially circular wide strip of plastic material, comprised by a peripheral wall. 
   
   
       3 . The safety helmet as set forth in  claim 2 , wherein the main outer shell is attached in a releasable manner to the inner helmet shell by releasable means of connections. 
   
   
       4 . The safety helmet as set forth in  claim 3 , wherein the means of connections are comprised by of at least three points of connections and include first means integral with the inner helmet shell intended to interact with second means integral with the main outer shell. 
   
   
       5 . The safety helmet as set forth in  claim 4 , wherein the main outer shell is attached to the inner helmet shell in four points, including a rear point, a front point, two lateral points, a left lateral point and a right lateral point. 
   
   
       6 . The safety helmet as set forth in  claim 5 , wherein the rear fastening point and the front fastening point are realized by a projection interacting with a hollow. 
   
   
       7 . The safety helmet as set forth in  claim 6 , wherein the inner helmet shell comprises an embedding cup intended to interact with a rear projection of corresponding dimension projecting towards the interior of the main outer shell, on a lower rear wall portion. 
   
   
       8 . The safety helmet as set forth in  claim 6 , wherein the inner helmet shell comprises an embedding housing intended to interact with a front projection of corresponding dimensions projecting towards the interior of the main outer shell, on the upper front wall portion, on the frontal area of the shell, while an elastic tongue is provided which after engagement of said projection returns to its initial position in order to provide the locking of it. 
   
   
       9 . The safety helmet as set forth in  claim 5 , wherein the lateral fastening points are realized each by a projection interacting with a hollow profile. 
   
   
       10 . The safety helmet as set forth in  claim 9 , wherein the inner helmet shell comprises on each side a fastening hole, in each of which is engaged a releasable corresponding fastening projection respectively of which the locking is provided by a locking pin. 
   
   
       11 . The safety helmet as set forth in  claim 10 , wherein the fastening projections are independent parts, which come for example from lateral hooking parts intended for example for attaching a respiratory mask, or a lighting lamp, even a pivoting facial shield. 
   
   
       12 . The safety helmet as set forth in  claim 1 , wherein the inner helmet shell provides the retaining of the chin strap, and a peripheral wall of the inner helmet shell comprises to this effect a set of holes intended for the passage of the straps of the chin strap. 
   
   
       13 . The safety helmet as set forth in  claim 1 , wherein a cap is attached to it on the inner helmet shell by means of clipping, in order to form an inner subunit. 
   
   
       14 . The safety helmet as set forth in  claim 1 , wherein the head band which is comprised by a peripheral strip is attached to the inner helmet shell.