Apparel – Guard or protector – For wearer's head
Patent
1987-01-12
1989-12-05
Reynolds, Wm. Carter
Apparel
Guard or protector
For wearer's head
2427, A61F 900, A42B 302
Patent
active
048843024
DESCRIPTION:
BRIEF SUMMARY
The invention refers to a safety helmet, particularly a crash helmet for motorcycle drivers.
Such safety helmets consist of a helmet shell provided with a cut-out for the face, whereby hinge pins are provided on both sides of the helmet shell, with bearings for a basically U-shaped face shield. This face shield can be lowered from an upper, open position into a lower position, in which it covers the face cut-out of the helmet shell. In the object of an older application, the face shield consists of a narrow, U-shaped shield frame and a transparent, also U-shaped shield plate which is provided with notch elements so that it can be inserted into a groove in the shield frame and held in place by means of the notch elements.
The purpose of the invention is to improve a safety helmet of the abovementioned nature so that the assembly, e.g. the replacement of the shield plate, is facilitated by means of a simpler construction of the related components. Further, the safety helmet should be designed so as to prevent a dimming of the shield plate, i.e. condensation of water vapor on the inside of the face shield.
Thereby that external swivel bearing points and interposed notch elements exist, there is a simple possibility to manually hook the shield plate into the swivel bearing points and then swing the shield plate upwards into its final engagement in the notch elements provided. No tools or devices are required for this purpose. Preferably, the notch point between the swivel bearing points is designed so that the disengagement of the notch connection can also be done very easily, manually or by means of very simple tools, e.g. a knife or a screwdriver, i.e. even a layman can very rapidly replace a damaged or broken shield plate. Further, the existence of aeration openings, preferably several aeration openings in the shield frame, makes it possible for the air beind the shield plate to escape upwards through the aeration openings, or, for the relative wind to flow along the inside of the shield plate and escape upwards through the aeration openings. In this manner, dimming of the inside of the shield plate is avoided with certainty.
There is a clean seal between shield plate and shield frame due to support of the shield plate on opposite groove walls of the insertion groove. In order not to obstruct the outward air flow through the aeration openings, the design provides a free opening at the upper edge of the shield plate at the level of each aeration opening, this in order to create a path for the air flow.
Additional advantageous details of the invention can be seen from the execution examples shown in the drawing and described in the following:
The following is shown:
FIGS. 1 and 3 the face shield for the safety helmet according to the invention, in side view and top view;
FIG. 2 a section of a detail according to FIG. 1;
FIG. 4 a perspective view of the face shield, where the shield plate is detached from the shield frame;
FIG. 5 a detail section of the center notch element;
FIG. 6 a section/side view of the detail in FIG. 5;
FIG. 7 an alternative execution of the notch connection, section;
FIG. 8 the section view of shield frame and shield plate according to the section lines in FIG. 2;
FIG. 9 the same section as in FIG. 8, in the area of an aeration opening;
FIG. 10 another, frontal section view of the shield frame and shield plate in the area of an aeration opening.
In the traditional manner, the safety helmet, which may be made of e.g. synthetic material, consists of a helmet shell, a portion of which is shown in FIG. 8 with the reference number 1, namely that shell portion which surrounds the face cut-out. This shell portion 1 can also be seen in FIG. 1. Hinged to this helmet shell 1, there is a U-shaped shield frame 2, which may also be made of a synthetic material and which engages by means of pivots 3 with corresponding swivelling elements, e.g. pivot openings, in the helmet shell 1, whereby the frame consequently has a hinged connection with the helmet shell 1. However, within the framework of the inv
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