GB2395178A

GB2395178A - Vehicle immobilisation device

Info

Publication number: GB2395178A
Application number: GB0326616A
Authority: GB
Inventors: Russell Lee Marks; Colin James Heffron
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-11-15
Filing date: 2003-11-14
Publication date: 2004-05-19
Anticipated expiration: 2023-11-14
Also published as: GB2395178B; GB0326616D0

Abstract

A vehicle immobilisation device 1, which is fixed to a windscreen of a vehicle, comprises a suction grip 2 pivotally attached to a housing 16 via strut members 8, 10, 12. The suction grip 2 has a flexible rubber suction cup with an annular high density foam protective layer 4. The housing 16 comprises a pump handle 14, used to suck air from the suction grip, and a releasing mechanism (not shown), which allows air to return to the suction member. A covering member 18 is pivotally connected via a hinge 22 to the housing and further comprises a locking mechanism 6a,6b which may be locked to restrict access to the release mechanism. The covering member serves to restrict the view of the driver thus immobilising the vehicle. The immobilisation device may comprise a plurality of suction grips and may further incorporate lockable hinged, sliding or folding panels to increase the covered area and further obscure the view of the driver.

Description

1 2395178

VEHICLE IMMOBILISATION DEVICE

The present invention relates to a vehicle immobilization device.

5 Wheel clamp devices are in common use today for dealing with illegally parked vehicles. Such a wheel clamp device is attached to the wheel of an illegally parked vehicle by a wheel clamp operative so as to prevent the owner of the vehicle from driving the lo vehicle away. At the same time as deploying the wheel clamp device on the illegally parked vehicle, the wheel clamp operative will usually display a notice in the window of the vehicle informing the owner that the vehicle is illegally parked and that the wheel clamp 15 device will remain on the vehicle until such a time as a penalty fee is paid. When the owner of the vehicle has contacted the authorities and paid the penalty fee, the wheel clamp operative is instructed to return to the vehicle to remove the wheel clamp device, after 20 which the owner of the vehicle is free to remove the vehicle. One problem with such existing wheel clamp devices is that, in order to be effective in immobilizing the vehicle as well as strong and secure enough to prevent 25 unauthorized removal of the device (by means of force or otherwise), they tend to be very bulky and heavy.

Furthermore, the complexity of many such wheel clamp devices makes the successful and secure deployment very difficult to achieve for an inexperienced wheel clamp 30 operative. The wheel clamp operative can also be put at a great risk when deploying a wheel clamp device on a vehicle that is parked flush to an obstacle on one side (for example a kerb), forcing the operative to work in the flow of oncoming traffic on the exposed 35 side of the vehicle. Wheel clamp devices are also

often ineffective against large-wheeled vehicles such as trucks and buses.

It is therefore desirable to provide a vehicle immobilization device which is free from the above 5 mentioned problems associated with the use of traditional wheel clamp devices.

According to a first aspect of the present invention there is provided a vehicle irnmobilisation device for securing to a vehicle windscreen, 10 comprising: screening means which, when the device is in an in-use disposition on the vehicle windscreen, serves to impair a driver's view through the windscreen, wherein the screening means is changeable from a first configuration to a second configuration, 15 the first configuration being more compact than the second configuration) suction grip means for holding said screening means in said in-use disposition on said windscreen by suction; releasing means for enabling release of the suction of said suction grip means so as 20 to allow removal of the device from the windscreen; and security means for preventing unauthorized operation of said releasing means.

According to a second aspect of the present invention there is provided a method for securing a 25 vehicle irnmobilisation device according to the first aspect to a vehicle windscreen, comprising the steps of: arranging said screening means on the vehicle windscreen in said in-use disposition so as to impair a driver's view through the windscreen; activating said 30 suction grip means so as to hold said screening means in said in-use disposition on said windscreen; and activating said security means so as to prevent unauthorized operation of said releasing means..

According to a third aspect of the present 35 invention there is provided a method for removing a vehicle immobilization device secured to a vehicle

windscreen by a method as claimed in any one of claims 29 to 32, comprising the steps of: de-activating said security means so as to enable operation of said releasing means; operating said releasing means to 5 deactivate said suction grip means; removing the vehicle irnmobilisation device from the vehicle windscreen. Preferably, the screening means is changeable from a first configuration to a second configuration, the 10 first configuration being more compact than the second configuration. One advantage of this feature is that the device may be more easily transported and/or stored when not in use, and yet may still serve to impair the forward visibility of the driver of the vehicle to 15 which the device is secured. Furthermore, it is envisaged that the size of the screening means may be adapted by the operator so that the device may better fit a different sized windscreen.

According to a fourth aspect of the present 20 invention, there is provided a screening means of a vehicle immobilization device, the screening means being changeable from a first configuration to a second configuration, the first configuration being more compact than the second configuration and having means 25 for allowing engagement with a suction grip means of the device.

Numerous means by which the screening means may be changed from the first, more compact, configuration to the second configuration, will be readily apparent to 30 the person skilled in the art. For example, the screening means may comprise a plurality of separate screen portions arranged and connected, for example by means of hinges, so as to be foldable. Alternatively, the screening means may comprise a plurality of screen 35 portions, at least two of which are operable to slide relative to one another in a telescopic fashion. As a

further alternative, the screening means may be rolled up from the second configuration to the first configuration and unrolled from the first configuration to the second configuration. The screening means may 5 also comprise a combination of a flexible material, such as rubber, which is provided with a plurality of formings which define one or more axes along which the screening means may be conveniently folded.

It will be appreciated that the number and 10 location of the suction grip means will preferably, but not essentially, be chosen so as to enable the screening means to be held in the second configuration when disposed on the vehicle windscreen. for example, a suction grip means may be provided at or near each of 15 the four corners of the screening means.

Alternatively, it. may be advantageous or necessary to provide a means by which the screening means can be securely held in the second configuration. Appropriate ways of achieving this will be readily apparent to the 20 person skilled in the art and include, for example, the use of bolts, lockable hinges or other latching mechanisms to secure a plurality of hingeably connected screen portions in the second configuration.

Alternatively, one or more rigid members may be 25 provided which at least partially span across two or more separate screen portions so as to secure the screening means in the second configuration. Similarly, in the case where the screening means may be operable to be rolled up, one or more rigid members may be 30 usefully employed in order to help hold the screening means in the second configuration.

Lee screening means may be adapted to be secured to the windscreen whilst still in said first configuration or may be adapted to be secured to the 35 windscreen after being changed to the second configuration.

Reference will now be made, by way of example, to the accompanying drawings, in which: Figure 1 is a front view of a vehicle to which a vehicle immobilization device according to a first 5 embodiment of the present invention has been secured; Figure 2 is a side view of the vehicle of Figure 1; Figure 3 is a side view of the first embodiment of the present invention shown in an open state; 10 Figure 4 is a plan view showing the first embodiment of the present invention in an open state; Figure 5 is a plan view showing parts of Figure 4 in more detail; Figure 6 is a schematic diagram for use in 15 explaining the size and positioning of an embodiment of the present invention; Figure 7 shows a variation of the first embodiment of the present invention having more than one suction grip; 20 Figure 8A is a plan view of a vehicle immobilization device according to a second embodiment of the present invention; Figure 8B is a side view of part of the second embodiment of the present invention; 25 Figure 9 shows a third embodiment, of the present invention; Figure 10 shows a fourth embodiment of the present invention; Figure 11 shows a fifth embodiment of the present 30 invention; and Figure 12 shows a sixth embodiment of the present invention. Figure 1 shows a vehicle immobilization device 1 according to a first embodiment of the present 35 invention secured to the exterior of the windscreen 28 of a vehicle 26, and Figure 2 is a side view of the

same vehicle 26 showing the vehicle immobillsation device 1 secured to the vehicle windscreen 28. The vehicle immobilization device 1 of the first embodiment is accompanied by an adhesive sticker 30 fixed onto the 5 front windscreen 28 warning the driver of the vehicle that no attempt should be made to move the vehicle 26 or remove the vehicle immobilization device 1.

The vehicle immobilization device] of the first embodiment of the present invention will now be 1() described in more detail with reference to Figures 3 to 5. The vehicle immobilization device 1 comprises a housing member 16 incorporating a suction grip 2, as well as first, second and third strut members 8, 10 and 12 respectively serving to secure said suction grip 15 within the housing member 16. The suction grip 2 can be secured in a pivotal manner within the housing member 16, e.g. by use of a ball and socket arrangement, so as to provide the device with extra flexibility to cope with windscreen curvature.

20 The suction grip 2 is formed in Lhis embodiment as a flexible rubber suction cup (such suction grips are commonly used in the glazing industry for the moving of panes of glass), the open end of which projects a small distance through a cut-out 3 in the lower face of the 25 housing member 16. An annular protective layer 4 of high density foam is formed on the lower face of the housing member 16 around the protruding suction grip 2, the thickness of the protective layer 4 being substantially the same as the protrusion distance of 30 the suction grip 2. It should be appreciated that, as an alternative to high density Loam, rubber may be used. Further incorporated within the housing member 16 is a pump handle 14 which is connected operatively to a 35 suction device (not shown) which is operated in use to suck air from within the suction grip 2. As shown in

Figure 5, the pump handle 14 is fixed to the strut members 8, 10 and 12 by fixing members 15. The strut members 8, 10 and 12 are fixed to the housing member 16 by a fixing member 24 secured to the inside of the 5 housing member 16. A releasing mechanism (not shown) its further provided within the housing member 16 which when operated allows air to be re- introduced into the suction grip 2, thereby releasing the suction.

A covering member 18 of the vehicle immobilization 10 device 1 is hinged to the housing member 16 by a hinge 22. The dotted outline of the covering member 18 in Figure 3 shows the vehicle immobilization device 1 of the present embodiment in a fully open state, while the solid-line outline of the covering member 18 shows the 15 vehicle immobilization device 1 in a partially open state. A retai.ninq strut 20 is provided to retain the covering member 18 in the partially open state. A security (or locking) mechanism 6b its provided on the covering member 18 which engages with a corresponding 20 security mechanism 6a provided on the housing member 16 when the covering member 18 is rotated to a fully closed position. When the covering member is in the closed position, the security mechanism 6a, 6b prevents unauthorized access to and operation of the components 25 held within the housing member 16.

The operation and deployment of the vehicle immobilization device 1 will now be described. The vehicle immobilization device 1 is firstly positioned on the exterior of the windscreen 28 as shown in Figure 30 1 with the suction grip 2 and protective layer 4 making contact with the windscreen 28. The vehicle lmmobilisation device 1 of the first embodiment forms a continuous opaque screen member which, when in an in-

use disposition on the windscreen 28 of the vehicle 26, 35 serves to impair the view through the windscreen of a driver of the vehicle, so as to make it impossible to

drive the vehicle away in a safe and legal manner. The ideal positioning and size of the screen member will be described below with reference to Figure 6.

Once in position on the windscreen 28, the 5 covering member 18 is swung open and retained in a partially open position by use of the retaining strut 20. Use of such a retaining strut 20 is beneficial since it prevents the covering member 18 moving to a fully open position where it might make contact with 10 and potentially damage the surface of the vehicle 26 on which the vehicle immobilization device 1 is being secured. Likewise, the high density foam layer 4 protects the vehicle 26 and the windscreen 28 from being scratched as the vehicle immobilization device 1 15 is being fitted.

When the vehicle immobilization device 1 is in a suitable position on the vehicle windscreen 28, the pump handle 14 is operated by the operative to pump air out of the suction grip 2 thereby to create a partial 20 vacuum within the interior of the suction grip 2. The retaining strut 20 is then released and the covering member 18 is swung down to the fully closed position.

The security mechanism 6a, 6b is activated to lock the vehicle immobilization device 1 closed so that 25 unauthorized access and operation of the components within the housing member, in particular the releasing mechanism, is prevented. A warning sticker 30 (or alternatively an LED message display sticker) is then adhered to the vehicle windscreen 28 informing the 30 driver of the action he should take to have the device removed and warning him that attempting to drive the vehicle with the device in place would be an offence, as would an unauthorized attempt to remove the device in any way. The vehicle 26 is thus rendered 35 substantially immobile. The adhesion created by the suction grip 2 is of such a strength as to make the

forceful removal of the vehicle immobilization device from the vehicle windscreen almost impossible) such an attempt to remove the device would anyway be illegal.

The vehicle immobilization device 1 is removed 5 from the vehicle windscreen 28 by first deactivating the security mechanism 6a, 6b, opening the covering member 18 to the partially opened state by use of the retaining strut 20, and then operating the releasing mechanism (not shown) to release the partial vacuum 10 from the suction grip 2. The vehicle immobilization device] can then be removed from the vehicle windscreen 28 and stowed away for subsequent re-

application. When the vehicle i.mmobilisation device 1 is in an 15 armed state and secured to the vehicle windscreen 28, it sits flush to the windscreen 28 with the high-

density foam protective layer 4 in contact with the windscreen 28 and the suction grip 2 holding the device 1 in tight contact with the windscreen 28. The size of 20 the gap between the housing member 16 and the windscreen 28 is preferably of the order of millimetres, with the gap being filled by the high density foam protective layer 4. The small. size of the gap makes the pricing-off of the vehicle i.mmobilisation 25 device 1 or the use of other invasive methods of removal more difficult. In the present embodiment the high density foam protective layer 4 not only serves to prevent scratches and the like to the vehicle windscreen 28 but it also serves as a suction grip 30 protection mechanism to prevent insertion of a piercing instrument or the like which may be used in an attempt to pierce the suction grip 2. Use of a toughened rubber compound for the suction grip is also beneficial to make piercing more difficult should this be 35 attempted.

As shown in Figure 2, the vehicle immobilisation device 1 assumes a substantially flat profile on the vehicle windscreen 28. The lateral dimensions of the vehicle irranobilisation device] are determined by the 5 basic requirement that the vehicle immobilisation device must serve its purpose of impairing the forward visibility of a driver of the vehicle to which the device is secured to such an extent as to render the vehicle dangerous and illegal to drive. A very wide 10 screening member will provide good vision impairment but may result in a vehicle immobilisation device which is too large or bulky for ease of use, while a narrower screening member will result in a more lightweight device but will provide less vision impairment.

15 Figure 6 is a schematic diagram showing the relative positions of the vehicle immobilisation device 1, the driver's eye 45 and the driver's view of the road 40 ahead. For the purpose of this illustration, it is assumed that the vehicle immobilisation device 1 20 is square-shaped. The vehicle immobilisation device 1 is preferably positioned on the vehicle windscreen 23 such that the centre of the vehicle immobilisation device 1 is directly in the usual line of sight from the driver's eye 45 to the road 40 lying ahead of the 25 driver.

The distance d between the driver 45 and the windscreen 23 on which the vehicle immobilisation device 1 is secured will vary from vehicle to vehicle and from driver to driver, but an estimate of the 30 maximum distance d will serve as a useful glide for the selection of appropriate width 2w for the vehicle immobilisation device 1 (the distance is Limited by the reach of the driver to the steering wheel). One parameter by which to measure the degree of vision 35 impairment provided by the vehicle immobilisation device 1 is the angle shown in Figure 6. The greater

the value of 0, the more impairment of the driver's view through the windscreen is provided. For effective impairment, the value of is preferably more than 5 , and more preferably greater than 10 , and more 5 preferably greater than 15 . The width 2w of the vehicle immobilisation device 1 is then calculated from the chosen value of according to the following formula: w - dTan0.

Although the first embodiment has been described 10 as having a single suction grip 2 located substantially in the centre of the vehicle immobilisation device 1, it will be appreciated that a greater number of suction grips can be provided and placed at various positions on the vehicle immobilisation device. For example, 15 Figure 7 shows a vehicle immobilisation device la that comprises four separate suction grips 2a located towards the four corners of the vehicle immobilisation device la. Although it is preferable for the high density foam protective layer to cover substantially 20 the entire lower surface of the housing member 16, this is by no means essential. For example, in the vehicle immobilisation device la of Figure 7 tile foam protective layer is confined to the vicinity around the suction grips 2a as shown by the dotted lines in 25 E'igure 7. Such a foam layer 4a is still able to provide protection against scratches and the like, and it still serves the purpose of hindering access of an invasive device to the suction grips 2a.

The first embodiment is described above as being 30 provided with its own means for producing the required partial vacuum in the suction grip 2 by way of a pump handle 14 operating a suction device (not shown). It will be appreciated that it is not necessary to provide a vehicle immobilisation device embodying the invention 35 with its own means for producing a partial vacuum, but instead it would be possible to provide suitable means

for connecting the suction grip to an external suction device. The operative would simply attach the external suction device to the vehicle immobilization device when required in order to create the partial vacuum in 5 the suction grip.

In the above first embodiment, the covering member 18 serves as the primary screening member that serves to impair the driver's forward visibility, although clearly other parts of the vehicle irnmobllisation 10 device also serve the function of screening, in some degree or another, the view of the road ahead from the driver. For example, the housing member 16 and the suction grip 2 are both opaque in this embodiment and therefore act to impair the driver's vision. However, 15 it is the covering member 18 in the first embodiment that is principally intended to function as the screening member.

In contrast to the first embodiment in which the principal screening member is constructed as a single 20 entity, a second embodiment will now be described with reference to Emigres 8A and 8B, in which the screening member comprises a plurality of separate sections.

Figure 8A is a plan view showing a vehicle immobilization device lb according to a second 25 embodiment of the present invention. The vehicle immobilization device lb comprises three separate screen portions 11-1, 11-2 and 11-3. The vehicle irnmobilisation device lb of the second embodiment comprises four suction grips 2b, two of which are 30 located on the first screen portion 11-1 and the other two of which are located on the third screen portion 11-3. A security device is provided for each of the suction grips 2b, comprising a security lid 18b connected by a hinge 22b to the appropriate screen 35 portion 11-1 or 11-3, the lid 18b being secured by means of a locking mechanism 66. The first screen

portion 11-1 is hinged to the second screen portion 11-

2 which itself is hinged to the third screen portion 11-3 by use of hinges 50.

Figure 8B is a side view showing in more detail 5 the construction of one of the suction elements of the vehicle immobilization device 1B. As in the first embodiment, a protective layer 4b is arranged around each suction grip 2b. It will be appreciated that the provision of such a protection layer is preferable but 10 not essential. The locking mechanism 66 shown in Figure 8A is shown in Figure 8R to comprise a first locking element 66b provided on the security lid which engages with a second locking element 66a provided on the screen member concerned (11-3 in Figure 8B).

15 In order to save space, in the second embodiment, each suction grip 2b is not provided with its own suction device and pump handle as in the first embodiment. Instead, a pump connection mechanism 70 is provided which enables the suction grip 2b to be 20 connected to an external pump device at the time of securing the device lb to the vehicle windscreen.

After the suction grip 2b has been activated so as to provide a grip on the windscreen, the external pump device is removed from the connection mechanism, the 25 securing lid 18b is closed, and the locking mechanism 66 is activated to prevent unauthorized removal of the device lb. Removal of the vehicle immobilization device lb of the second embodiment is achieved by deactivating the 30 locking mechanisms 66 in turn, opening each of the security lids lBb, and operating the releasing means so as to deactivate the suction grips. Once removed, the vehicle immobilisatlon device lb can be folded or rolled up for compact storage.

35 It will be appreciated that the security lids 18b of the second embodiment need not be hinged to one of

the screen portions 11-1 to 11-3. Instead a security lid may be in the form of a removable cap, preferably secured to the vehicle immobilization device by a securing wire or the like so as to prevent the loss 5 thereof.

Other arrangements of screen portions and associated folding mechanisms will be readily apparent to the person skilled in the art. For example, Figure 9 shows a vehicle immobilization device lo comprising two 10 screen portions 33-1 and 33-2, a suction grip 2c provided on the first screen portion 33-1 and a security lid 18c connected by a hinge 22c to the screen portion 33-1. A locking mechanism 66c is also provided.

The screen portion 33-2 is provided, at opposing 15 edges 34 and 35, w.i. th a receiving section. The screen portion 33-1 is arranged so as to be slideably received within the receiving section in a telescopic fashion, thereby allowing the device Lo be moveable from a first, more compact configuration, to a second 20 configuration large enough to impair a driver's view when disposed on the vehicle windscreen. A pair of rigid members 37a and 37b are provided on the screen portion 33-2, each rigid member comprising a foldable strut which may be extended to span across both screen 25 portions and secured in an extended configuration by a latch, a locking means or any other suitable means.

Figure 9A illustrates the device when between the first configuration and the second configuration, the screen portion:33-1 being partially received within the 30 receiving section 33-2. The rigid members 37a and 37b are shown in a folded configuration. Figure 9B shows the device in the second configuration, the rigid members shown in an extended configuration. Figure 9C shows a sectional view through the line A-A.

35 A further embodiment of the present invention will now be described with reference to Figure 10.

Figure 10A shows a plan view of a pair of suction grip means 40a and 40b. Each suction grip means comprises a flexible rubber suction cup 41 and a pump handle 42a and 42b operatively connected to the 5 respective suction cup. The pump handle comprises a plunger 43 and a release mechanism 51. The suction grip means 40a and 4()b are connected together by means of a strut 44, which is formed in two halves 44a and 44b joined together by means of a double hinge joint 45.

10 Protrusions 52a, 52b and 52c are provided on each of the suction cups and the hinge joint 45 (shown more clearly in Figure 10D).

Figure 10B shows a pair of rigid screening portions 46a and 46b which are joined together by means 15 of a hinge to form a screening means which is changeable from a first configuration to a second configuration, the first configuration being more compact than the second configuration. When in the second configuration, the screening means exhibits a 20 shape that substantially conforms to that of a vehicle windscreen. Each screening portion is provided with a first covered aperture 47 and a second aperture 48 and has a strip of rubber around its circumference. In order to accommodate different sized windscreens, the 25 screening portions of this embodiment each comprise a central section 49 and two side sections 50a and 50b.

The side sections are releasably coupled to the central portion and may be conveniently disconnected in order to adapt the device to fit a smaller sized windscreen.

30 In order to deploy the vehicle immobilization device, the suction grip means 40a and 40b are disposed in the desired position on the vehicle windscreen. The plunger 43 of each suction grip means is pumped in order to evacuate air from the suction cup thereby 35 causing it to seal securely to the windscreen surface.

Once sufficient grip has been achieved, the screening

means is placed over the suction grip means so that each pump handle 42a and 42b extends into a respective first covered aperture 47, and each protrusion 52 extends into a respective second aperture 48. A so 5 called disk lock 53 extends through an aperture provided in each of the protrusions thereby securing the screening means to the suction grip means and preventing access to the release mechanism 51.

The relative positions of the suction grip means 10 and the screening means, when in an in use deployment, is illustrated in Figure lOC.

A side elevation of the deployed vehicle immobilization device is shown in Figure lOD. It can be seen that the configuration of two-part strut 44 15 advantageously allows the curvature of the windscreen upon which the device is secured to be accommodated for. In order to remove the vehicle immobilisation device of this embodiment, the locks 53 must be 20 unlocked so that the screening portions can be removed thereby allow access to the suction grip means 41a and 41b. A release 51 is provided which, when pressed, allows air to re-till the suction cup so that the suction grip means may be detached. 25 In this embodiment, the screening portions therefore act as both a

screening means and, coupled with the disk lock and protrusions, a security means preventing unauthorized access to the operation of the releasing means.

30 A variation of this embodiment comprises a single screen portion, which is formed of a central section and two side sections. The side sections are releasably coupled to the central section and may be conveniently disconnected in order to adapt the device to fit a 35 smaller sized windscreen. The dimensions and shape of the screening means are such that, when the device is

in an in-use disposition on the vehicle windscreen, the screening means serves to impair a drivers view through the windscreen.

Figures llA to llC shows a further vehicle 5 immobilization device embodying the present invention.

The device 60 comprises suction grip means 61a and 61b which function in an identical manner to those described with reference to Figure 10. In this embodiment/ an upper surface of the suction Cups of the 10 suction grip means are conically welded to a flexible rubber screening means 62. The screening means is provided with rigid formings 63 which are joined together by means of links 64. The formings 63 serve to impart some rigidity to the otherwise flexible 15 screening means and, together with the links 64, serve to prevent someone from cutting through the rubber in order to access the suction grip means.

When not in use, the device may be conveniently folded along the centre line in parallel with formings 20 63.

In order to deploy the device on a vehicle windscreen, the suction grip means 61a and 61b, together with the integrally formed screening means, are positioned on the windscreen and the plunger of 25 each is pumped as previously described. Once the desired suction has been achieved, a pair of security covers 65a and 6.5b each having a covered aperture for the pump handle of the suction grip means, are lockably secured thereto by means of a locking means 66a and 30 66b. These also serve to press on the formings 63 in order to assist with holding the screening means in an inOuse disposition. The locking means 66a and 66b are shown more clearly in Figures llB and llC.

An advantage of this embodiment is that it is 35 relatively light and can be easily folded for storage.

The formings 63 are formed of aluminium however any other rigid material, such as plastic, may be used.

Figure 12 shows a further embodiment of the present invention. The device 70 comprises a suction 5 grip means 71 which is conically welded to a rubber screening means 72 having rigid formings 73 and links 74. This embodiment is similar to that shown in Figure 11 except that it is provided with only one suction grip means 71, therefore making it less expensive to 10 manufacture. A further advantage of this embodiment is its portability. As can be seen from Figure 12B, the formings 73 are disposed so as to allow the screening means to be folded up in a concertina fashion. A locking means 76, illustrated in Figures]2C and 12D, 15 is further provided to inhibit access to the release mechanism of the suction grip means.

Although the principal use of a vehicle immobilization device embodying the present invention has been suggested as being an alternative to a 20 traditional wheel clamp device for dealing with illegally parked vehicles, it will be appreciated that such a device embodying the present invention will find an application in any situation where the removal of a vehicle is to be prevented. For example an embodiment 25 of the present invention can be used as a vehicle security device to prevent theft of the vehicle to which it is secured. It is therefore envisaged that embodiments of the present invention may be utilised by car vehicle owners/drivers as an anti-theft device.

30 Such an embodiment could additionally or alternatively be used as a frost protection means. Furthermore, it is envisaged that embodiments of the present invention may, on the outer surface of the screening means, be light reflective. In this respect, the outer surface of 35 the screening means could be provided with a light reflective surface.

Claims

CLAIMS:

1. A vehicle irnmobilisation device for securing to a vehicle windscreen, comprising: 5 screening means which, when the device is in an in-use disposition on the vehicle windscreen, serves to impair a driver's view through the windscreen, wherein the screening means is changeable from a first configuration to a second configuration, the first 10 configuration being more compact than the second configuration; suction grip means for holding said screening means in said in-use disposition on said windscreen by suction; 15 releasing means for enabling release of the suction of said suction grip means so as to allow removal of the device from the windscreen; and security means for preventing unauthorized operation of said releasing means.

2. A vehicle immobilization device as claimed in claim 1, further comprising suction means for producing the suction in said suction grip means.

25

3. A vehicle immobilization device as claimed in claim 2, wherein said suction means are operable manually by the user of the device to produce the suction in said suction grip means.

30

4. A vehicle immobilization device as claimed in claim 3, further comprising a pump handle that is operated by said user to produce the suction.

5. A vehicle immobili.sation device as claimed in 35 claim 4, wherein said pump handle is formed and arranged so as to serve also as a grip handle for

lifting and carrying the vehicle immobilisation device.

6. A vehicle immobilisation device as claimed in any preceding claim, comprising housing means for housing 5 said releasing means, and covering means moveable between an open position allowing access to said releasing means and a closed position preventing access to said releasing means, said security means serving to lock said covering means in said closed position.

7. A vehicle immobilisation device as claimed in claim 6, wherein said covering means comprise a hinged lid. 15

8. A vehicle immobilisation device as claimed in claim 6 or 7, wherein said covering means also act as said screening means.

9. A vehicle immobilisation device as claimed in any 20 preceding claim, wherein said suction grip means comprise a plurality of suction grips.

10. A vehicle immobilisation device as claimed in claim 9, when read as appended to claim 6, wherein 25 covering means and security means are provided separately for each of said plurality of suction grips.

11. A vehicle immobilisation device as claimed in any preceding claim, further comprising a protective layer 30 arranged to cushion the vehicle windscreen from contact with the device during fitting and when in said in-use disposition on said vehicle windscreen.

12. A vehicle immobilisation device as claimed in 35 claim 11, wherein said protective layer is formed of high density foam.

13. A vehicle immobilization device as claimed in any preceding claim, comprising suction grip protection means for preventing access to said suction grip means 5 from the under-side of the device facing the windscreen when in said in-use disposition.

14. A vehicle lmmobilisation device as claimed in claim 13, when read as appended to claim 11, wherein 10 said protective layer is arranged around said suction grip means so as to serve as said suction grip protection means.

15. A vehicle immohilisation device as claimed in any 1.5 preceding claim, wherein said device is arranged to sit flush to said vehicle windscreen when in said in-use disposition.

16. A vehicle iTrunobi].i.sation device as claimed in any 20 preceding claim, wherein parts of the device visible from the exterior of the vehicle when the device is in said in-use disposition are decorated in a highly visible finish.

25

17. A vehicle irmobilisation device as claimed in claim].6, wherein said highly visible finish is a reflective finish.

18. A vehicle immobilization device as claimed in any 30 preceding claim, wherein said screening means comprise a plurality of screen portions.

19. A vehicle inwobilisation device as claimed in 35 claim 18, wherein said screen portions are arranged and

connected so as to be foldable or operable to be rolled up.

20. A vehicle immobilization device as claimed in any 5 preceding claim, wherein said screening means comprises two screen portions which are hingeably connected together.

21. A vehicle immobilization device as claimed in any 10 preceding claim, wherein said screening means comprises rubber.

22. A vehicle immobi]isation device as claimed in claim 21, wherein the screening means further comprises a 15 plurality of rigid formings.

23. A vehicle immobilization device as claimed claim 21 or 22, wherein said screening means is conically welded to the suction grip means.

24. A vehicle immobilization device as claimed in any preceding claim, where said suction grip means comprise one or more suction cups.

25 25. A vehicle immobilization device as claimed in any preceding claim, wherein the device assumes a substantially flat profile when in said inuse disposition. 30

26. A vehicle immobilization device as claimed in any preceding claim, wherein the width of the device is of the order of 2d Tan 0, where d is an estimate of the distance from the driver's eye to the vehicle windscreen, and a is greater than 5 .

27. A vehicle immobilization device as claimed in claim 26, wherein 0 is greater than 10 .

28. A vehicle immobilization device as claimed in 5 claim 26, wherein is greater than 15 .

29. A method for securing a vehicle immobilization device as claimed in any preceding claim to a vehicle windscreen, comprising the steps of: 10 arranging said screening means on the vehicle windscreen in said in- use disposition so as to impair a driver's view through the windscreen; activating said suction grip means so as to hold said screening means in said in-use disposition on said 15 windscreen; and activating said security means so as to prevent unauthorized operation of said releasing means.

30. A method as claimed in claim 29, wherein said 20 screening means are arranged on said vehicle windscreen such that the centre of the screening means is substantially in the driver's line of vision.

31. A method as claimed in claim 29 or 30, wherein the 25 vehicle immobilization device is placed on the exterior of the vehicle windscreen.

32. A method as claimed in claims 29, 3() or 31, further comprising the step of applying an information 30 sticker to the windscreen.

33. A method for removing a vehicle immobilization device secured to a vehicle windscreen by a method as claimed in any one of claims 29 to 32, comprising the 35 steps of:

de-activating said security means so as to enable operation of said releasing means; operating said releasing means to deactivate said suction grip means; 5 removing the vehicle immobilization device from the vehicle windscreen.

34. A method of preventing a vehicle from being driven away, comprising attaching a device as claimed in any 10 one of claims 1 to 28 to a vehicle windscreen.

35. A screening means of a vehicle immobilization device, the screening means being changeable from a first configuration to a second configuration, the 15 first configuration being more compact than the second configuration and having means for allowing engagement with a suction grip means of the device.

36. A vehicle immobilization device substantially as 20 hereinbefore described with reference to the accompanying drawings.

37. A method for securing a vehicle immobilization device substantially as hereinbefore described with 25 reference to the accompanying drawings.

38. A method for removing a vehicle immobilization device substantially as hereinbefore described with reference to the accompanying drawings.

39. A method of preventing a vehicle from being driven away substantially as hereinbefore described with reference to the accompanying drawings.

35

40. A screening means substantially as hereinbefore described with reference to the accompanying drawings.