CH669716A5 - - Google Patents

Abstract

Air is extracted by a collection zone (3) (fig. 3) through duct (8) and four holes (7) from chamber (4) located between the wearer's head and the polystyrene; the resulting low pressure that is created pulls other air through openings (5) at the sides of the front; the entry of the air by such openings is aided by the fact that a slight pressure is present inside the helmet in the front zone by dynamic effects, and this entry generates a true and real circulation that, preventing stagnation of the hot air, creates a real inside conditioning effect. Further the air, which enters by the lower part of the helmet and by the openings to eliminate the condensation on the visor, is sucked upward by chimney effect which also contributes to reducing the steaming of the visor itself.

Description

DESCRIPTION

The present invention refers to a ventilation device for the circulation of air inside a helmet, in particular of the integral type for motorcycle use. It allows to give rise to a real air conditioning inside the helmet, eliminating the annoying rise in temperature and fogging inside the helmet itself.

Taking note that the increase in temperature inside a motorcycle helmet causes fatigue and annoyance to the user, an internal ventilation system is proposed based on the effect of depression that is created in some areas of the helmet while riding due to the movement of the helmet in the air fluid.

Checked that the upper area of the helmet equipped with a deflector has high depression values, it is used to extract the stagnant air inside. The further depression that is created draws more air to the outside which helps to create a real circulation.

Ventilation devices for helmets are known which however have all the drawbacks of the discharge of the air introduced by dynamic effect during motion, which stagnates in the front part or which at most exits from openings located on the sides or from the lower edges located in drain. This with overheating of the environment inside the helmet and possible fogging of the visor in unfavorable weather conditions.

The device according to the present invention has the purpose of overcoming the above drawbacks and is characterized in that it is made up of air extraction openings towards the outside, by depression in dynamic regime, placed on the upper part of the helmet at the beyond the dividing line between pressure and depression of the helmet itself when it is hit by a flowing current; from outside air supply ducts; and by means of air circulation inside the helmet to conduct said air coming from the outside towards the air extraction openings.

The ventilation device, according to preferred embodiments of the invention, also has the following characteristics:

- said air extraction openings are equipped with a deflector, or roof or spoiler to increase the depression values that are used to extract stagnant air inside the helmet;

- the deflector has an aerodynamic profile with an inlet and outlet edge, which guarantee maximum efficiency and minimum noise;

- the stagnant air inside the helmet (between the user's head and the absorption material) is sucked in evenly through the flow holes, due to the particular shape of the connection duct between these holes and the collection area below to the deflector.

These and other details of the device in question will appear from the description of a preferred, non-limiting embodiment, illustrated in the attached drawings.

Fig. 1 represents the diagram of the dynamic vacuum ventilation device applied on the helmet;

fig. 2 represents a vertical longitudinal section of the helmet for motorcyclists of the integral type with the device of the invention;

fig. 3 represents a view from below of the vacuum duct ventilation device, applied to a helmet without the comfort material;

fig. 4 represents the arrangement of the lateral inlet ducts of the ventilation air at the level of the circulation zone above the user's head and the collection channel located in the upper part of the cap of the absorption material;

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669 716

fig. 5 represents a bottom view of the helmet with the comfort material showing the air circulation ducts.

Description of the device

The helmet (fig. 2) is equipped with an extraction deflector 1 (fig. 1) mounted on the upper part of the shell and communicating through slotted openings 2 with a chamber 3 located between the outer shell and the absorption material shell .

The deflector 1 has a wing profile shape with a trailing edge connected to decrease noise and turbulence and is placed on the center line of the shell in an area that places it approximately at the point of greatest height of the helmet when it is dressed by the user; therefore the discharge area is located just beyond the dividing line between the pressure and the vacuum of the helmet.

The deflector is also adjustable in flow by sliding it into a suitable seat (which also allows it to close).

Air circulation (figs. 2 and 3) takes place in a circular area above the user's head, obtained between the head itself and the absorption material. This area 4 (figs. 2 and 5) communicates with the outside through six openings (fig. 3), two for entry 5 and four 7 for exit.

The two inlet openings 5 are made on the two extreme sides of the front area above the forehead, by means of two channels made in the cap of the absorption material, covered by plates 6 of semi-rigid material that prevent the padding from penetrating into them (fig . 2).

These channels allow the direct passage of air between the two areas on the sides of the forehead 5 'and the area above the user's head.

The four outlet openings 7 'are exactly four cylindrical holes 7 suitably connected which, crossing the cap of the absorption material from side to side, communicate the area 4 with a duct 8 of a particular shape which ends exactly in the collection area 3 below the opening slots 2 communicating with the outside.

The duct 8 has a particular shape detectable by the drawings which allows the balanced extraction of the air through the four communication holes.

io Working principle

When the helmet moves in the fluid, the depression effect created at the exit of the duct draws air from the inside. This air is extracted through the collection area 3 (figs. 1 and 3), through the duct 8 and the four holes 7, of the chamber 4 located 15 between the user's head and the absorption material; the consequent depression that is created draws more air through the openings 5 on the sides of the forehead; the entry of air from these openings is helped by the fact that a slight pressure is present inside the helmet in the front area for dynamic effects, and 20 this entry generates a real circulation which, preventing the stagnation of hot air , creates an effect of real internal conditioning. In addition, the air that enters from the lower part of the helmet and from the openings to eliminate condensation on the visor is sucked upwards with a chimney effect which helps to decrease the misting of the visor itself.

The system can also be used with jet helmets for different uses.

An efficient conditioning of the internal environment of a helmet is thus obtained for dynamic effect only without resorting to 30 complicated devices installed in the helmet that are sophisticated, expensive, uncomfortable and unreliable.

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2 drawings sheets

Claims (12)

669 716 1. Ventilation device for the circulation of air inside a helmet, in particular of the integral type for motorcycle use, characterized in that it consists of openings (2, 2 ') for extracting the air towards the external, for dynamic depression, placed on the upper part of the helmet beyond the dividing line between pressure and depression of the helmet itself when it is hit by a flowing current; ducts (5) for supplying air from the outside; and by means (4, 7, 3) for circulating the air inside the helmet to conduct said air coming from the outside towards the air extraction openings. Ventilation device according to claim 1, wherein said air extraction openings (2, 2 ') are equipped with deflector or canopy or spoiler (1) to increase the depression values that are used to extract the air stagnant inside the helmet. 2 3. Ventilation device according to claim 2, wherein the extraction deflector has an aerodynamic profile with an inlet and outlet edge, to guarantee maximum efficiency and minimum noise. Ventilation device according to Claim 2 or 3, characterized in that the deflector (1) allows adjustment of the exhaust air flow rate through its total or partial closure mounted slidingly on guides or a suitable seat. 5. Ventilation device according to Claim 2 or 3 or 4, characterized in that the connection of the deflector or junction with the external surface of the helmet is preferential breaking and calibrated to easily detach from the shell in the event of accidents. 6, characterized in that the air circulation means consist of a series of holes or flow channels (7) connected to a connection ring (8) which ends exactly in the collection area (3) at the outlet, to allow the balanced extraction of stagnant and hot air located inside (4) of the helmet between the user's head and the absorption material. Ventilation device according to claim 1, wherein the air extraction openings (2, 2 ') are placed under the deflector (1) and are shaped like a slot, suitably connected and in communication with a lower collection area (3) of the air to be expelled to allow an effective aerodynamic connection with the holes communicating with the interior. 7, where there is an area (4) of effective volume and air circulation between the user's head and the shock absorption material, said area connected at the inlet (5 ') and at the outlet (7') with ducts (5, 7) which allow air circulation. Ventilation device according to claim 1 or Ventilation device according to claim 1 or Ventilation device according to claim 1, characterized in that the air supply means (5) consist of inlet ducts arranged on the sides of the front wall. Ventilation device according to claim 1 or 9, characterized in that the air inlet ducts (5) are formed by means of recesses in the absorption material. Ventilation device according to one of claims 1 or 9 or 10, characterized in that the inlet ducts (5) are protected by plates of semi-rigid material (6) to avoid being blocked by the pressure of the comfort material; and are covered and closed to prevent being blocked by the comfort material and the user's hair. 12. Protective helmet for motorcycle use incorporating the ventilation and conditioning device, so as to avoid the increase in temperature inside and the misting of the visor, according to one of claims 1 to 11.