GB2341787A

GB2341787A - Air jet windscreen cleaners

Info

Publication number: GB2341787A
Application number: GB9821515A
Authority: GB
Inventors: Mohamad Alame
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-09-24
Filing date: 1998-09-24
Publication date: 2000-03-29
Also published as: GB9821515D0

Abstract

A vehicle windscreen is cleaned by providing a turbine generating high pressure air flow which is passed to a tube situated at the windscreen periphery. The tube has a plurality of holes which allow the air to exit at a shallow angle across the screen, keeping rain and other precipitation off the screen, without the risk of scratching as in conventional blade wipers. In the static embodiment the tube may be located at the top of the screen as in fig.1, with a barrier 2 in the centre so that either side of the arrangement may be switched on or off independently by the driver. In another static embodiment there are separate supplies for each side of the screen [fig.2 not shown]. Alternatively there may be a pair of wiper arms 9,11, fig.4, which are hollow and preferably made of transparent material. They are closed on all sides except that which faces the screen glass. The high pressure air is fed into these and they rise on a cushion of air and then are made to translate back and forth like traditional wipers, the jet of air forming the cushion clearing the water etc off the screen.

Description

1 1 2341787 UNDISTURBED WINDSCREEN WIPER Undisturbed air windscreen wiper

is of two kinds: invisible and rotating stick air windscreen wipers.

The invisible air windscreen wiper comprises a directed pumped air under high pressure by a turbine motor placed in the front beside the engine of the car. This pumped air moves through a tube and goes out through holes which fixed on the top of the external windscreen.

The rotating stick air windscreen wiper is another kind which works by air also, but the pumped air will move through a tube to a chamber inside the rotating stick wiper then goes out through one hole under high pressure to strike the windscreen and throw away the falling raining water on its surface.

The classical known windscreen wipers are attached to the windscreen and may scratch or leave scars or some water on the surface of the windscreen especially if there is defect in the resin part, moreover, they are big and disturb the vision of the driver.

The invisible air windscreen wiper is invisible, so that.it supplies a clear vision to the driver; and it will not cause scratches on the windscreen, as the classical windscreen wipers. It is excellent for wiping the falling.raining water, ice and especially the flying sands with winds.

The rotating stick air windscreen wipers is not touch the windscreen and not cause scratch, therefore, provide a good vision and gently wipe the windscreen by the pumped air and throw away the falling raining water, ice, dusts and sands falling with winds on the windscreen without harming or scratching it as the classical wipers will do.

2 According to the present invention there is provided an invisible and rotating stick undisturbed windscreen wipers, both work by pumped air under high pressure. The invisible air wiper comprising a turbine motor which pumps the air through a tube ended with holes through which the pumped air will exit under high pressure. Some of the holes are directed to touch the windscreen on an angle and some of the holes are directed inparrallel to the windscreen surface.

But according to the stick air windscreen wiper, the air goes out through an opening in the stick wiper after the pumped air will push the stick upward.

Preferably the stick of the rotating stick air windscreen wiper is made of a thin layer of transparent materiral to decrease the visual disturbance of the driver.

A specific embodiment of the invention will now be described a way of example with reference to the accompanying drawing in which:

Figure 1 shows a frontal View of the windscreen and the invisible air windscreen wiper with the pumped air.

Figure 2 shows a frontal view of a smaller local invisible air windscreen wiper.

Figure 3 shows a side view of the invisible air windscreen wiper with the pumped air directed to the windscreen surface.

Figure 4 illustrate a frontal View of rotating stick air windscreen wiper. Figure 5 shows an upper view of the rotating stick air windscreen wiper.

Figure 6 shows a side view of the rotating stick air windscreen wiper with the stick attached to the surface of the windscreen.

Figure 7 shows a side view of the rotating stick air windscreen wiper and the stick pushed up by the pumped air.

Referring to the drawing the invisible windscreen wiper comprises a turbine motor 5 fixed in the front beside the engine of the car and connected on a tube 6 which ended with an opening holes 3 through which the pumped air 7 by the 3 turbine motor 5 will exit outside under high pressure to throw away the falling raining water, dusts and sands flying with winds.

In figure 3 shows how the pumped air 7 is covering the surface of the windscreen. It is moving down and inclines a small angles to the surface of the windscreen so that, it strikes the windscreen and then moves parallel to it.

In order to do that, the turbine motor should switched on by a switch fixed in front of the driver.

The turbine motor has two grade forces of air pressure: high and low depending on the quantity of the falling raining water. Also the invisible air wiper may work only on one half side of the windscreen or on two sides together. All these fimctions may be controlled by switches in front of the driver. This is what concern to the first type as shown in figure 1.

The second type of invisible air windscreen wiper as shown in figure 2 where the pumped air is local to a chosen area of the windscreen 1.

A second kind of undisturbed air windscreen wiper but it is visible and also works by air pumped pressure by a turbine motor 5 with less force need. The air pumped through a tube 6 which connected on a mechanical rotating stick air windscreen wiper 9 preferably made of a transparent material fixed on the bottom of the windscreen by rotator 8 which rotates from right to left and reverse as known in a classical wipers as shown in figure 4. This stick wiper 9 is thin and made of a transparent material to cause minimal visual disturbance for the driver. Inside the stick wiper 9 present a chamber 11 closed in all sides except the whole side which faces the surface of the cars windscreen and is opened completely. When the stick wiper 9 is not working, the stick will attach to the surface of the windscreen so that, the whole opening hole will be closed.

The above will happened because, the stick 9 is fixed with a thin metal sheet 13 as shown in figure 6 by a joint 12. This metal sheet 13 is fixed with the rotator 4 8 by a second joint 12. On the middle of the metal sheet 13 a fixed spring 14 which is also fixed on the rotator 8 so that, the spring 14 will trail the thin metal sheet 13 toward itself. WIfich means the direction of the thin metal. sheet 13 is downward so that this will trail the entire stick wiper downward to the surface of the windscreen. But when the air is pumped through the tube 6 to the chamber 11 which is inside the stick wiper 9 where the air will be collected, the pressure inside the chamber becomes higher so that, it win push up the stick wiper 9 with the tlfin metal sheet 13 to touch a hard metal sheet 10 placed above them which all fixed on the rotator 8, this is because, the strength force of the spring 14 is less than the pumped air pressure force so that, it cannot face it as shown in figure 7, which lead to separate the attachment between chamber's edges of the stick wiper and the surface of the windscreen 1 that will open the closed hole of the chamber. After the closed hole will be opend, the pumped air by the turbine motor will go outside the chamber making a constant moving outside air layer 7 between the stick wiper 9 and the surface of the windscreen 1 as shown in figure 5 and figure 7. This constant moving air layer will throw away the drops of falling r i g water on this area of the windscreen.

After two seconds from the beginning of pumping the air by a turbine motor, the stick wiper should rotate from right to left and reverse to wipe the whole area of the windscreen, which we need.

When the driver will switch ofF the turbine motor, the stick wiper will first move back to its place and stop rotating and then after, the turbine motor will stop pumping the air.

Claims

1 - An undisturbed air windscreen wiper comprises a turbine motor which is connected on a tube ended with holes means for pumping the air under a high pressure. The pumped air exits through the ending holes and directed to the windscreen of the car.

2- An undisturbed air windscreen wiper as claimed in ClaimI, wherein the guide means is provided with the ability of using two kinds of air windscreen wipers: The invisible and rotating stick air windscreen wipers.

3- An undisturbed air windscreen wiper as claimed in Claim 1 or Claim2, wherein the guide means are are provided on the air pumped system for throwing away and preventing the falling raining water to touch the windscreen of the car.

4- An invisible air windscreen wiper as claimed in Claim 1 or Claim 2, or Claim 3, wherein guide means are provided on the turbine motor force cooperable with the size and direction of the ending holes to control the pumped air which goes out through these ending holes.

5- An invisible air windscreen wiper as claimed in Claim 3, or Claim 4, wherein the ending holes are divided equally to two groups right and left by a barrier between them.

6- An invisible air windscreen wiper as claimed in Claim 4, or Claim 5, wherein the barrier means is adapted to co-operate with the switches which fixed in front of the driver in order to control the work of each side of the two half groups of the ending holes either alone or together.

7- A rotating stick air car's windscreen wiper as claimed in the Claim.2, wherein the guide means is provided with the chamber inside the stick cooperable with the rotational function of the stick wiper from right to left and reverse.