Helmet having a guiding mechanism for a compatible visor

1. A helmet comprising:

a shell adapted to contact a wearer's head, said shell having a frontal portion and a rear portion, said frontal portion having a frontal lower edge;

a face seal;

a visor having a visor lower portion, said face seal being connected to said visor lower portion;

two guiding mechanisms, each one of said two guiding mechanisms being located on a different side of said shell, each one of said two guiding mechanisms further having a first unyielding structural element and a second unyielding structural element, said first and said second unyielding structural elements being connected to said shell respectively through a first pivot and a second pivot, said first and said second unyielding structural elements being connected to said visor respectively through a third pivot and a fourth pivot, said first and said second unyielding structural element collaborating so as to define a pre-determined trajectory along which said guiding mechanisms are operative to guide at least said visor lower portion, said pre-determined trajectory extending from a retracted position where said visor is substantially proximate said frontal portion of said shell and substantially outside a field of view of the wearer to a deployed position where said visor is substantially below said frontal lower edge and within the field of view of the wearer and where said face seal is operative to contact a face of the wearer, said pre-determined trajectory having a first trajectory portion and a second trajectory portion, said first trajectory portion extending predominantly downwardly from said retracted position to said second trajectory portion, said second trajectory portion extending predominantly rearwardly from said first trajectory portion to said deployed position and predominantly perpendicular to a face of the wearer, said third pivot being located substantially in front of said first pivot when said visor is in said retracted position and being located substantially below said first pivot when said visor is in said deployed position; said fourth pivot is located substantially above said second pivot when said visor is in said deployed position and

a biasing means, said biasing means connecting one of said visor and said first unyielding structural element of at least one of said guiding mechanisms to said shell, said biasing means being operative to bias said visor towards said deployed position,

wherein said third pivot and said fourth pivot are located so as to move predominantly perpendicularly to the face of the wearer and predominantly in the direction of said rear portion of said shell when said guiding mechanisms guide said visor lower portion along said second trajectory portion predominantly in the direction of said rear portion of said shell so that said face seal is operative to predominantly perpendicularly contact the face of the wearer under a bias of said biasing means.

2. The helmet of claim 1 wherein said first unyielding structural element is a first ink and said second unyielding structural element is a second link.

3. The helmet of claim 2 wherein sad biasing means is operative to bias said visor towards said retracted position.

4. The helmet of claim 2 wherein each one of said two guiding mechanisms is removably connected to said visor through a visor adaptor, said visor adaptor being connected to said visor through a quickly detachable type of connection, said first link being pivotably connected to a lower connecting portion of said visor adaptor at said third pivot.

5. The helmet of claim 2 wherein said shell comprises a pocket adapted to receive said visor when said visor is in said retracted position.

6. The helmet of claim 1 wherein said visor further has a top portion and two side portions, said two side portions being free from having said face seal.