This invention concerns containment apparatus, and particularly but not exclusively containment apparatus for locating a tyre whilst the tyre is being inflated.

When inflating vehicle tyres and especially for the first time, and particularly with tyres such as a lorry tyre which may have been retreaded, there is a potential for the tyre failing, or a failure occurring with the mounting of the tyre on a wheel. Such a failure can be catastrophic and can be dangerous to persons in the vicinity. For instance a tyre may come off a wheel, and the tyre may be projected in one direction with the wheel moving in an opposite direction. Also, during a tyre failure, and particularly with tyres such as lorry tyres which are inflated to relatively high pressures, a significant amount of high pressure air can be immediately released, which can sometimes move or even lift a person off the ground, potentially leading to injury, and even in some instances a fatality.

According to the present invention there is provided a containment apparatus for a tyre whilst the tyre is being inflated, the apparatus including walls defining an open topped enclosure, which walls are constructed so as to substantially provide no line of sight therethrough, and to provide a convoluted pathway for air passing therethrough.

The enclosure may include a number of walls, which may define a substantially rectangular enclosure in plan view. A one of the walls may be selectively openable to permit a tyre to be moved into or out of the enclosure.

A safety sensor may be provided to detect when the openable wall is fully closed, and the safety sensor may be operatively connectable so as to prevent a tyre in the enclosure from being inflated until the openable wall is fully closed.

A latch may be provided for retaining the openable wall fully closed, and a further safety sensor may be provided to detect when the latch is engaged to retain the openable wall fully closed, and the further safety sensor may be operatively connectable so as to prevent a tyre in the enclosure from being inflated if the latch is not engaged. A window may be provided in a one of the walls, and may be provided in the openable wall. The window may be made of polycarbonate.

The walls may be made of steel. At least some of the walls may be made of overlapping lengths of channel section, and each wall may be made of lengths of channel section extending vertically in use, with adjacent lengths of channel section arranged facing in opposite directions with the channels of adjacent lengths of channel section facing each other and overlapping, so as to define a convoluted pathway therebetween.

Adjacent channel sections may be mounted together at spaced locations, and adjacent channel sections may be mounted together at lower and upper ends.

The apparatus may also include a floor to the enclosure, and a formation may be provided on the floor to retain a tyre within the enclosure. One or more formations may be provided on the floor to enable the apparatus to be mounted to the ground or elsewhere.

An embodiment of the present invention will now be described by way of example only and with reference to the accompanying drawings, in which:- Fig. 1 is a front view of containment apparatus according to the invention; Rg. 2 is a side view of the apparatus of Fig.1 ;

Fig. 3 is a sectional plan view of the apparatus of Fig. 1 ;

Fig. 4 is a perspective view from the front, one side and above of the apparatus of Fig. 1 ; and

Fig. 5 is a perspective sectional view from the front, a side and above of the apparatus of Fig. 1. The drawings show a containment apparatus 10 suitable for locating a vehicle tyre such as a lorry tyre when being inflated. Such inflation may occur for instance after retreading of the tyre, when potentially the origins or history of the tyre may be unknown, and there is a potential for a number of different types of failure, which failure may be catastrophic.

The apparatus 10 comprises an enclosure 12 defined by a floor 14, two side walls 16 and 18, and front and rear walls 20, 22. The side walls, 16, 18 and rear wall 22 are formed from a structure of upstanding lengths of channel section 24 which alternatively face in opposite directions with the channels facing each other, and with the side limbs of the channel sections 24 just overlapping each other, thereby providing a convoluted passageway 26 therethrough as best seen in Fig. 3.

The channel sections 24 are mounted to the floor 14, and are mounted together at their top ends by inverted strips 28 of angle iron which are set at

45° to the horizontal. A strengthening strip 30 of angle ion also extends between the side walls 16, 18 substantially midway therealong. Two sets of lengths 32 of angle ion are provided at spaced locations on the interior channels only of the channel section 24 of the enclosure 12, to provide strengthening. A formation in the form of a length 34 of angle iron facing downwardly and at a 45° inclination, is provided across the floor 14 towards the front wall 20, to retain a tyre within the enclosure 12.

The front 20 of the enclosure 12 is in the form of an openable door with a steel frame 36 defining an opening across which is mounted a sheet 38 of polycarbonate. A central support bar 40 extends vertically across the opening in the door. Two locking catches 42 are provided on the door.

In use a vehicle tyre can be located in the enclosure 12 to be inflated with an air line. An opening (not shown) may be provided in a one of the walls

16, 18 or 22 for an air line to pass through, and be provided with a gland or other seal to prevent any line of sight into the interior of the enclosure 12. The front wall door 20 will be closed, and if required a sensor or switch may be provided to detect that the front wall 20 is fully closed. Such a sensor or switch can be operatively connected to an inflation arrangement, such that full inflation can only take place when it is detected that the front wall 20 is fully closed.

A further sensor or switch may be provided on a one of the locking catches 42 to detect when the catch 42 is fully engaged. Such a sensor or switch can be operatively connected to an inflation arrangement, such that full inflation can only take place when it is detected that the catch 42 is fully engaged. In the event of a failure of the tyre, gas and pressure can be dissipated upwardly, and also through the convoluted passageways 26, thereby significantly dissipating the pressure and any sound. The apparatus therefore prevents any high pressure air being released laterally from a failing tyre. Furthermore, the apparatus prevents any part of the tyre, wheel or otherwise being ejected therefrom other than vertically. There is thus described an apparatus which significantly improves safety when tyres are being inflated, and particularly for a first time. The apparatus is however of relatively straightforward construction and can thus be robustly and readily manufactured. The apparatus also dissipates air, gas and sound when a tyre failure occurs.

Various modifications may be made without departing from the scope of the invention. For instance, the door may have a similar structure formed from channel sections as described for the side walls. A window may be provided in one of the side walls or the rear wall. The construction of the walls may take a different form. A single locking catch may be provided on the door. Formations may be provided in the floor to allow the apparatus to be mounted to the floor, or for instance to a vehicle for use in mobile situations. Whilst endeavouring in the foregoing specification to draw attention to those features of the invention believed to be of particular importance it should be understood that the Applicant claims protection in respect of any patentable feature or combination of features hereinbefore referred to and/or shown in the drawings whether or not particular emphasis has been placed thereon.