Tiltable visor for helmets, in particular motorcyclists helmets and similar
This invention relates to a tiltable visor for helmets, especially for motorcyclists&#39; or similar helmets, which is adapted to increase or decrease the front opening in the helmet to meet the users&#39; requirements. 
     In some known types of helmets the tiltable visor is fitted in a recess in the helmet&#39;s front part and hence does not project from it and in this case the helmet is provided with peripheral shoulders to house the visor. The visor is fitted movably by suitable hinges which enable it to perform two movements in succession: a transverse movement to shift it away from the helmet shoulders and an oscillatory movement to free the opening of the helmet, and vice versa. This type of conventional structure for mounting and moving a visor on a helmet is disclosed in French publication No. 2,338,005, made available to the public on Aug. 12, 1977 and Applicant&#39;s copending application Ser. No. 915,376. 
     Furthermore, the visor is secured into its lowermost position by locking devices consisting usually of flexible or spring backed buttons the two coupled elements of which are apt to hold the visor in place in the helmet shoulders. 
     It is evident that the above lock devices can give rise to some difficulties in tilting the visor, especially when the users&#39; hands are, as in specific case of motorcyclists, engaged. 
     The invention covered by the present patent obviates these and other drawbacks in the sense that the visor contemplated is provided with apertures in the visor lock divices, said apertures acting as recesses through which the user can grasp the lateral ends of the visor and move these away from the relevant shoulders in the helmet. 
     In one preferred form of embodiment, the edge of the visor, adjacent to the lock devices, is provided with chamfered notches apt to facilitate engagement of the users&#39; fingers in the unlocking phase of the lock device. 
     The opening or openings or notches in the flap may be shaped, if necessary, at least in part to form openings for ventilation of the helmet&#39;s interior. 
     The invention will now be described in conjunction with the attached drawing which illustrates, by way of example, one form of embodiment of the visor according to the invention. 
    
    
     In the drawing: 
     FIG. 1 is a perspective view of the helmet fitted with the visor according to the invention; 
     FIG. 2 is a detail (in cross-section), on a larger scale, of the visor at the position corresponding to the lock device. 
    
    
     With reference to these figures, it can be seen that the helmet A is provided on its front part with a peripheral shoulder A1 suitably shaped to house a visor C connected to the helmet by means B, e.g. universal joints B. Precisely, said means B are fitted between the ends, or flaps, C1 of visor C and the bottom part A2 of shoulder A1 to permit both substantially horizontal movement and oscillating movement of the visor about the axis of said universal joint connecting means B. For a showing of such conventional structure, see for example, the previously mentioned French publication No. 2,338,005. 
     Flaps C1 are also provided at suitable positions with lock devices 12-14, each consisting, in the known manner, of two complementary elements 12 and 14 secured respectively to wall A2 of helmet A and to said flap C1; said elements are of the fixed type and are either elastic or spring backed so as to couple with each other movably by simple elastic forcing. 
     According to the invention, flaps C1, at their edges and close to the lock device 12, are provided with one or more apertures or notches 16 which, in the case shown, are curved and their edge 18 is chamfered inwardly. It can thus be seen how a user can easily and quickly sepaelements 12 and 14 of lock device 12-14 to disengage flap C1 from shoulder A1 in front of the helmet and tilt visor C to the position desired. 
     Disengagement is simplified as the user introduces one finger, for example the thumb, into the cavity formed by notch 16 and bottom of shoulder A1 to exert a lever action, the fulcrum of which is edge 20 formed by a part of the peripheral wall of said shoulder A1. 
     Apertures or notches 16 may obviously be conveniently shaped as desired. In this regard, flaps C1 can be provided with a plurality of openings 16 arranged in suitable succession to form ventilating openings for the helmet interior, since a slot may be provided between flaps C1 and bottom A2 of shoulder A1 to render said openings 16 communicant with the internal part of the helmet. This slot permits making laminar the air stream entering the helmet so that the air stream will continually lap the inside transparent surface of the visor so as thus to avoid the formation of moisture or mist on said surface. Moreover, because of the position of openings 16 the entry or water or humidity into the helmet is also inhibited.