Apparel – Guard or protector – For wearer's head
Patent
1997-05-29
1998-06-16
Neas, Michael A.
Apparel
Guard or protector
For wearer's head
2 15, 2435, A42B 324
Patent
active
057652350
DESCRIPTION:
BRIEF SUMMARY
DESCRIPTION
1. Field of the Invention
The invention relates to an anti-condensation visor, comprising an outer visor which, relative to the user, is situated on the outermost peripheral surface of the helmet or hood to which said visor belongs, which is provided with openings for fitting of said outer visor on said helmet, and which is provided with at least one lip for the user to fold away said outer visor.
2. Background of the Invention
Anti-condensation visors are generally known. There are many applications known where a visor of a protective helmet or hood is provided with an anti-condensation facility. These known devices can be divided into two types. The first type is the anti-condensation visor in which a hydrophilic, anti-condensation layer is fitted on the inside wall of the outer visor. This layer can be fitted in various known ways in the form of a sheet or otherwise as a covering. The second type is the anti-condensation visor in which a double-glazed device is provided, comparable to the double-glazed devices which are known for windows of buildings and houses. In the case of this type there is a layer of air between the inner and the outer visor. In addition, condensation can be prevented by providing sufficient ventilation along the surface of the visor or by heating the surface of the visor by means of warm air or a heater, for example an electric heater.
Anti-condensation visors of the first type are common, but this type does have a number of major disadvantages. First, the hydrophilic layer is not fitted detachably, and the same layer cannot be fitted or removed many times in succession. It is therefore not possible to provide a visor with, for example, sun shade which can be fitted as desired. Secondly, the fitted layer weathers as time passes. As a result of the weathering, the layer can become detached and/or fall off in places, with the result that the anti-condensation effect is lost. Thirdly, the fitted layer has little or no scratch resistance. Scratches on a visor lead to undesirable dazzle, which is detrimental to (travelling) safety. Fourthly, the fitted layer is generally of low thickness, which adversely affects the anti-condensation effect compared with a thicker layer, which has a greater capacity for absorbing condensation. Fifthly, the hydrophilic layer must be fitted with great precision, for the layer has to be fitted tightly joined up, and there must be no inclusion of air.
Anti-condensation visors of the second type are also quite common. The greatest disadvantage of this type is that it requires a specific design for fitting. The thickness of such an anti-condensation visor in practice is a number of millimeters greater than the thickness of just an outer visor made from a single plastic layer. In any case, as regards motorcycle helmets, such an anti-condensation visor is not suitable for fitting on motorcycle helmets which have already been delivered, since they are designed for a much thinner visor. Besides, when such a type of anti-condensation visor is used the visor initially provided is superfluous, which incurs unnecessary waste and costs.
The prevention of condensation by means of ventilation with possibly warm air is found to work unsatisfactorily in practice in the case of motorcycling. In particular, when a motorcycle stops at, for example traffic lights, the ventilation for such prevention is inadequate.
The prevention of condensation by means of a heater is unsuitable for motorcycling in practice, due to the fact that such a heater requires, inter alia, a power supply and connecting wires, which means that it undesirably takes up space and is awkward as regards use. Besides, the heating wires obstruct the clear view of the user when these wires are situated in the visor.
U.S. Pat. No. 4,047,249 discloses a helmet having an outer visor and an inner visor. The inner visor comprises a sheet of polarizing material which is fixed to the outer visor by snapping means.
U.S. Pat. No. 4,138,746 describes a visor assembly comprising a number of adjacent visors
REFERENCES:
patent: 4047249 (1977-09-01), Booth
patent: 4101980 (1978-07-01), Stepan et al.
patent: 4138746 (1979-02-01), Bergmann
patent: 4584721 (1986-04-01), Yamamoto
patent: 5500953 (1996-03-01), Reuber et al.
patent: 5671483 (1997-09-01), Reuber
Derek's Patent B.V.
Neas Michael A.
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