AU2010202150A1

AU2010202150A1 - Apparatus for restricting access to the cap of a container closed by a cap

Info

Publication number: AU2010202150A1
Application number: AU2010202150A
Authority: AU
Inventors: Trevor David Leisk
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-06-18
Filing date: 2010-05-27
Publication date: 2011-01-13
Also published as: GB201004161D0; GB2471150A

Description

Regulation 3.2 AUSTRALIA Patents Act 1990 COMPLETE SPECIFICATION Name of applicant/Nominated Person: Trevor David Leisk Address for Service: Davies Collison Cave, Patent Attorneys 1 Nicholson Street, MELBOURNE, Victoria, 3000. Invention title: "Apparatus for restricting access to the cap of a container closed by a cap" Details of Associated Provisional Application: Provisional Patent Application No. 2009902800. The following statement is a full description of this invention, including the best method of performing it known to me: 2 Technical field. This invention concerns the security of the contents of a container closed by a cap. More particularly, it concerns a device for restricting access to the cap which closes the filling and emptying aperture of a container. It was 5 conceived for use with a container that (a) is designed to hold liquid, and (b) is normally closed with a screw cap or a snap-fit closure. However, it is not limited to such a container. Preliminary note. In this specification, including the claims, "directional" terms (such as "top", 10 "bottom", "side", "upper", "lower", "above", "upwardly", "below", "inwardly", "horizontal", "vertical" and the like) will be used in the sense that these terms would have with reference to a container as shown in Figures 1 and 2 of the accompanying drawings, and an embodiment of the invention as shown in Figures 3, 4 and 6 of the accompanying drawings. 15 Background to the invention. Liquid chemicals (including liquid fuels) are often stored in right circular cylindrical drums or containers that are normally stacked alongside each other, in layers, with the axis of each cylindrical container vertical. When such containers are being transported, the drums are usually stacked in the same manner on the 20 transporting vehicle. A particularly useful container for the storage and transportation of liquid chemicals, constructed of a high density plastics material, is depicted in Figures 1 and 2 of the accompanying drawings. This container (1) has an upper wall which partially surrounds an opening or aperture in the 25 top of the container, through which opening a liquid may be poured when filling the container and when emptying the container of its contents; and 3 (2) has a lower wall which extends downwardly from the base of the container. A cap-receiving wall extends upwardly from the opening in the top of the container, and a cap applied to the top of this cap-receiving wall closes the opening. The cap is usually a screw cap, but a snap-fit cap is an occasional alternative closure 5 member for the container. The upper wall, which extends upwardly from the top of the container, has several (usually four) regions, equi-spaced around the outside of the upper wall, that are formed as steps. These steps enable a container of the same type to be stacked on top of the container, with the lowermost part of the lower wall of the upper 0 container in contact with the "steps" of the upper wall of the lower container. When one of these containers is in a layered stack of containers, the open space bounded by the two ends of the upper wall, the top of the lower container, and the lower wall of the upper container, provides access to the cap of the container, so that the status of the cap can be checked from time to time. 5 The caps of these (and other) containers are not secure. Access to the liquid in a container can be gained during storage and transportation of the container simply by removing its cap. Supplying each container with a lockable cap (similar to the lockable filler cap used to close the filler tube of the petrol tank of a car or other vehicle) is one way of providing a degree of security, but this form of 0 security has been rejected because (a) with some chemicals, corrosion of the lock in the cap can occur, and (b) such a lockable cap can be prised from the cap receiving wall extending above the opening in the top of the container. Disclosure of the invention. It is an objective of the present invention to provide a re-usable device which 5 restricts access to the cap which closes a container of the "particularly useful" type described above. However, the invention is not limited, in its applicability, 4 to such containers: This objective is achieved by providing a box-like structure comprising a collar member and a lid member. The lid member is attached to the collar member by a hinge (or by hinges) which provides (or which provide) an axis about which the lid 5 member may be rotated, relative to the collar member. The collar member comprises a substantially planar plate member. Typically, but not necessarily, this plate member will be a rectangular plate. It has an aperture in it which enables the plate to be a close fit around the cap-receiving wall that projects upwardly around the opening in the top of the container that is the 0 access point for filling and emptying the container. If that opening (and, therefore, the cap-receiving wall) is circular, (a) it will normally be closed by a screw cap; and (b) the aperture in the plate member of the collar member will also be circular and will have a diameter that (1) is greater than the outer diameter of the circular cap-receiving wall, and (2) is less than the outer diameter at the lower end 5 (when it has been applied to a container) of the screw cap that is screwed onto the cap-receiving wall to close the container's opening. Thus the plate member of the collar member provides a "collar" around the cap-receiving wall of the container, and when the collar member is in position with the cap-receiving wall passing through the aperture in the plate member of the collar member, the collar member o will held in place by the pressure applied to the plate member when the cap is screwed onto the cap-receiving wall. (Although it is very desirable that the cap actually clamps the plate member of the collar member in place; a small amount of movement of this plate member under the cap may is permitted, provided the cap, when screwed onto the cap-receiving wall, prevents the removal of the plate 5 member from its position around the cap-receiving wall.) If the container has a filling/emptying opening that has a cap-receiving wall 5 projecting from the periphery of that opening onto which a cap can be snapped to close the container (such a cap-receiving wall is not necessarily circular in cross-section), the aperture in the plate member of the collar member should have a shape that is similar to the cross-sectional shape of the cap-receiving wall, 5 but with dimensions such that the plate member of the collar member can be placed on the container with the cap-receiving wall passing through the aperture in the plate member of the collar member. Thus the plate member of the collar member provides a "collar" around the cap-receiving wall, and that plate member will be held in place by the cap that is snapped onto the cap-receiving wall. The plate member of the collar member has a locking bar for a lock (preferably a slam lock) mounted above its upper surface. This locking bar is a generally horizontal bar (but may be both arcuate and generally horizontal). The lid member also has a plate member, the periphery of which preferably has the same shape as the periphery of the plate member of the collar member. At least one side wall extends from a) at least part of the periphery of the plate member of the lid member; or b) at least part of the periphery of the plate member of the collar member; or c) at least part of the periphery of the plate member of the lid member and at least part of the periphery of the plate member of the collar member. ) Typically, the hinge (or hinges) connecting the lid member to the collar member will be positioned at, or close to, an edge of one of the side walls (or, when there are side walls extending from both plate members, at the abutting edges of two side walls). A lock is mounted on the plate member of the lid member. As noted above, the lock is preferably a slam lock. The lock is so positioned that when the lid member is rotated about the hinge (or hinges) so that the plate member of the lid member 6 overlies the plate member of the collar member, the lock can be securely engaged with the locking bar, thereby to lock the lid member to the collar member. For this to occur, if the side walls are rectangular, (a) both plate members will be planar plates; and 5 (b) the dimensions of the partial or complete peripheral wall or walls should be such that, when the container is closed by a cap on the cap-receiving wall of the container and the lock carried by the lid member is engaged with the locking bar mounted on the collar member, the lower surface of the plate member of the lid member should be 0 (1) essentially parallel to the upper surface of the plate member of the collar member, and (2) spaced from the upper surface of the plate member of the collar member by a distance which is greater (but preferably only a small amount greater) than the distance from (a) the top of the cap on the 5 cap-receiving wall of the container, to (b) the upper surface of the plate member of the collar member. Thus, according to the present invention, there is provided apparatus for restricting access to the cap of a container having an opening that is closed by a cap which fits over a cap-receiving wall of the container, said cap-receiving wall extending .0 upwardly from the periphery of said opening, said cap access restricting apparatus comprising a collar member and a lid member, with at least one hinge connecting said collar member to said lid member, said at least one hinge having an axis of rotation, characterised in that: a) said collar member comprises a plate member having an aperture therein 5 that has dimensions such that (1) said cap-receiving wall can pass through said aperture, but (b) when said cap-receiving wall is passed through said aperture and said cap is applied to said cap-receiving wall to close said opening, the lower edge of said cap prevents the removal of said plate 7 member of said collar member from said cap-receiving wall; b) a locking bar is mounted above the upper surface of said plate member of said collar member, said locking bar being generally horizontal, or being arcuate and generally horizontal; 5 c) said lid member comprises a plate member having a lock mounted thereon in a position such that, when said lid member is rotated about said axis of rotation so that said plate member of said lid member overlies said plate member of said collar member, said lock is engageable with said locking bar; 0 d) at least one side wall extends from (1) at least part of the periphery of the plate member of said lid member; or (2) at least part of the periphery of the plate member of said collar member; or 5 (3) at least part of the periphery of the plate member of said lid member and at least part of the periphery of said plate member of the collar member; and e) the height of said, or each, side wall is such that, when said lock is engaged with said locking bar, a barrier extending between said plate member of 0 said lid member and said plate member of said collar member is provided by said side wall or walls, and the combination of said barrier and said plate members prevents access to said cap. In a preferred form of the invention, a post extends substantially vertically from the top surface of the plate member of the collar member. This post (a) has an 5 eye through it, near the end of the post that is remote from the plate member of the collar member, and (b) has a length such that, when the lid member is rotated about the hinge (or hinges) so that the plate member of the lid member overlies the plate member of the collar member and the lock is engaged with the locking bar, 8 the end of the post which contains the eye projects through an aperture in the plate member of the lid member. A crimped seal arrangement, an auxiliary lock, or a similar device may then be operatively connected to the eye through the post, to enhance the security of the cap access restriction apparatus. Preferably, such a post 5 extends from the region of the collar member that is remote from the hinge. Embodiments of the present invention will now be described, by way of example only, with reference to the accompanying drawings. Because the present invention was developed for use with the "particularly useful" type of container described above, this type of container will be featured in the embodiments of the invention 10 that are described below. Brief description of the drawings. Figure 1 is a sketch of the top region of the "particularly useful"container used for the storage and transport of liquid chemicals. Figure 2 is a sectional view (partly schematic) at A-A through the top of a container 15 of the type shown in Figure 1 and through the base region of a second container of this type, positioned above the first container. Figure 3 is a partly schematic sectional view through the top of a container of the type depicted in Figure 1, having cap access restricting apparatus, constructed in accordance with the present invention, mounted on it. 20 Figure 4 is a partly schematic perspective sketch of the cap access restricting apparatus that is featured in Figure 3. Figure 5 is a sectional view at B-B of Figure 4.

9 Figure 6 is a partly schematic perspective sketch of a cap access restriction apparatus which is similar to that featured in Figures 3 and 4, with the lid member overlying the collar member of the locking assembly. Figure 7 is a partly schematic perspective sketch of another example of a cap 5 access restricting apparatus, constructed in accordance with the present invention. Detailed description of the illustrated embodiments. The top region 10 of the container 20 illustrated in Figures 1 and 2 has an opening 11, through which the container may be filled with a liquid (using a hose, a funnel, or other filling device). A cap-receiving wall 12 extends upwardly from the 0 periphery of the opening 11, so that the opening 11 can be closed by a cap 13 that is screwed onto, or snapped onto, the wall 12. (In this illustration of the type of container for which the present invention was developed, it will be assumed that the cap-receiving wall 12 is be a circular wall and that the cap 13 is screwed onto the wall 12.) 5 An upper wall 14 extends from the top 10 of the container. The upper wall 14 is not fully circular. It is an arcuate wall (the "arc" being approximately three quarters of a circle) that extends from one end 17 of the wall to a second end 18. When a second, similar container is stacked on top of the container 20, the space between the ends 17 and 18 of the wall 14 provides access to the cap 13 20 that has been screwed onto the cap-receiving wall 12. A series of elongate apertures 19 formed in the wall 14 provide grip regions for manual movement of the container 20. A series of steps 15 (four steps 15 are shown in the illustrated example) are formed integrally with the wall 14, on its outer surface. As will be seen from Figure 2, the steps 15 provide receiving surfaces for a circular lower 25 wall 16 that extends downwardly from the base of a similar, second container, when that second container is to be stacked on top of the container 20 depicted 10 in Figure 1. An embodiment of a cap access restricting apparatus, which prevents access to the cap 13 when it has been applied to the cap-receiving wall 12, is illustrated in Figures 3 and 4. This cap access restricting apparatus has a collar member 21 and 5 a lid member 22. The collar member 21 comprises a plate member 30 having an aperture 31 in it. The aperture 31 is circular (in the illustrated example) and has a diameter that is slightly greater than the outer diameter of the circular cap-receiving wall 12. Thus the plate member 30 fits over the wall 12 with the peripheral edge 32, ) which defines the aperture 31, closely adjacent to the outer side surface of the cap-receiving wall 12. When the cap 13 is applied to the wall 12 (screwed onto the wall 12 in this illustrated embodiment), the lower surface of the cap 13 preferably bears against the top surface of the plate member 31, and holds it securely in place. If necessary, the lower end of the cap 13 may be provided with a radially extending flange 33, to assist in securely holding the collar plate member 30 in position. It will be apparent from Figure 3 that the present inventor has coined the term "collar member" because the plate member 30, with its attachments (which are described below), forms a collar around the cap-receiving wall 12. A substantially 0 horizontal (or arcuate but substantially horizontal) locking bar 37 is mounted above the plate member 30 on two posts 37A that extend upwardly from the top surface of the plate member 30. In the embodiment of the cap access restriction apparatus that is depicted, partly schematically, in Figures 3 and 4, the lid member 22 comprises a plate member 5 35 on which a lock 36 is mounted. A peripheral wall, comprising four contiguous 11 side walls 38, extends at right angles to the plate member 35. The height h of each side wall 38 is such that when the lid member 22 is "closed" onto the collar member 21 and the lock 36 is engageable with the locking bar 37, the lowermost (in this "closed" position) edges 39 of the side walls 38 are close to, and may abut 5 against, the top surface of the plate member 30. Thus, in this position, the cap access restricting apparatus forms a box-like structure around the cap 13, and around the cap-receiving wall 12, and the side walls 38 bar access to the cap 13 (they form a barrier that prevents access to the cap 13). The "closing" of the lid member 22 onto the collar member 21 is effected by 0 rotating the plate member 35 about the axis of rotation of a pair of aligned hinges 34. (A single hinge extending along a major part of the edge of the plate member 30 may be used instead of two - or more than two - hinges 34.) It will be apparent from the last preceding paragraph that the lock 36 is mounted on the plate member 35 of the lid member in a position such that, when the lid member is rotated about 5 the rotation axis of the hinges 34 until the plate member 35 overlies the plate member 30 and the planar surfaces of the plate members 30 and 35 are substantially parallel to each other, the lock 36 engages with the locking bar 37, and is then securely fastened to the locking bar. As noted above, the lock 36 is preferably a slam lock, that will automatically fasten 0 in engagement with the locking bar 37 when the lid member 22 is "closed" above the collar member 21, and will not be removeable from the locking bar until a key is inserted into the key slot 46 (see Figure 6) and rotated to move the lock member that is engaged with the locking bar 37 away from the locking bar. When the plate members 30 and 35 are positioned so that the lock 36 engages with 5 the locking bar 37, there should be only a small gap between the lowermost surface of the the plate member 35 and the uppermost surface of the cap 13.

12 The illustrated embodiment of Figure 4 has three additional features. The first is a convenience feature, namely, a biasing steel spring 44 (of known construction) fitted to the lid member to bias it into its "open" configuration (shown in Figures 3 and 4) when the lock 36 is unlocked to disengage it from the locking bar 37. 5 The second and third additional features are preferred for optimal restriction of access to the cap of (and, therefore, to the contents of) a container used to store and/or transport hazardous liquid chemicals. The second additional feature is a circular flange 40 which extends upwardly from the top surface of the planar plate member 30. As shown in Figures 4 and 5, this 3 circular flange 40 is positioned so that, when the lid member 22 is "closed" onto the collar member 21 and the lock 36 engages with the locking bar 37, the flange 40 encircles the end 36A of the lock 36, thereby preventing a curved blade or similar tool from contacting the end 36A and physically moving it sideways in an attempt to dislodge the lock from the locking bar 37. It will be appreciated that 5 the flange 40 need not be circular. It may have any suitable shape that prevents access to the end 36A of the lock 36. Preferably, as shown in Figures 4 and 5, the flange 40 has an inside shape that matches the shape of the end 36A of the lock. The third additional feature shown in Figure 4 of the drawings is a post 41 that extends upwardly from the plate member 30. The elongate direction of the post 41 0 is substantially at right angles to the plane of the plate member 30. The plate member 35 of the lid member 22 has an aperture 42 (a) that has a shape that is similar to the cross-sectional shape of the post 41 and dimensions that permit the post 41 to pass through it; and (b) that is positioned in the plate member 35 so that, when 'the lid member 22 is 5 "closed" onto the collar member 21 and the lock 36 engages with the locking bar 37, the end of the post 41 passes through the aperture 42 and projects 13 above the plate member 35. The portion of the post 41 that projects above the plate member 35 has an eye (an aperture or short channel) 43. Depending on the cross-sectional dimensions of the eye 43, 5 (a) the bolt arm of a padlock may be passed through it, or (b) as shown in Figure 6, a wire or a thread 47 of a strong plastics material (or other suitable material) may be passed through it and the ends of the wire or thread connected together by a crimped seal 45. Such a padlock or crimped seal arrangement provides a tamper-evident feature for the cap access restricting apparatus (if the seal is removed and/or if the padlock has been forced open). Provided the crimped seal or padlock is intact, to gain access to a cap 13 surrounded by a cap access restriction device, the wire or thread 44 has to be cut, or the padlock has to be removed, then a key has to be inserted into the key-receiving slot 46 of the lock 36, and the lock 36 has to be disengaged from the locking bar 37, to enable the lid member 22 to be rotated away from the collar member 21. For additional security, (a) an alarm signal generator, which is activated when the lock 36 is disengaged from the locking bar 27 and/or the plate member 35 is moved away from the D plate member 30, may be included in the locking assembly, and (b) a radio frequency identification device (commonly called an RFID) may be included in the locking assembly of the present invention, to enable the container to be tracked during transportation. If an RFID is present, it may be: 1. attached to the locking bar 37; 2. attached to the cap 13; 3. attached to the lower portion of the post 41 (the portion that is between 14 the plate member 30 and the plate member 35 when the lock 36 is engaged with the locking bar 37); or 4. separately mounted on the plate member 30 or the plate member 35. This list of locations for the RFID is not exhaustive. 5 The embodiment illustrated in Figure 6 of the accompanying drawings has side walls 38 extending from the plate member 35 and from the plate member 30. When the lid member 22 is "closed" onto the collar member 21 and the lock 36 engages with the locking bar 37, the wall members on one of the plate members may abut against correspondingly located wall members on the other plate member, or the 0 correspondingly located plate members may be positioned to overlap each other. Conveniently, the plate members 30 and 35 are constructed from stainless steel, and the side walls 28 are either (a) formed integrally with one, or both, of the plate members, or (b) seam welded to their associated plate member. However, the plate members and wall members may be constructed from any other suitable 5 material, including a high density plastics material. Figure 7 depicts another example of a cap access restricting apparatus which is constructed in accordance with the present invention. In Figure 7, features which correspond to features of the embodiment illustrated in Figures 3 and 4 have been given the same reference numbers as those used in Figures 3 and 4. Thus, in Figure 20 7, the collar member 21 comprises a plate member 30 with its aperture 31, locking bar 37, circular flange 40 and post 41 (with an eye 43). The collar member of the Figure 7 embodiment is connected by a single, long hinge 34 to an edge of the arcuate plate member 35 of the lid member 22. The lock 36 (preferably a slam lock) is firmly mounted within a tube 48 that is 25 attached to the plate member 35. If the plate member 35 is of steel, the tube 48 15 will normally be welded in position. If the plate member 35 is of a high density plastics material, the tube 48 will normally be formed integrally with the plate member 35. The tube 48 is positioned so that, when the lid member 22 is rotated about the axis of the hinge 24, the lock 36 is engageable with the locking bar 37 5 when the edges 39 of the side walls 38 abut against - or nearly abut against - the plate member 30. The post 41 of the Figure 7 embodiment is used - with the aperture 42 in the arcuate plate member 35 - in the same manner as the post 41 in the embodiment illustrated in Figures 3 and 4. It should be apparent that an alarm 'signal 0 generator and/or an RFID may be included in the cap access restricting apparatus illustrated in Figure 7. The combination of a container and a cap access restricting device is encompassed by the present invention. Engineers will appreciate that the illustrated embodiments are provided by way of 5 example only, and that variations and modifications of the illustrated embodiments may be made without departing from the present inventive concept, as defined by the following claims. For example, (1) the position of the lock 36 (and, therefore, of the flange 40, if present) may be varied; 20 (2) the position and size of the post 41, if present (and, therefore, the position and size of the aperture 42 in the plate member 35) may be varied; (3) the plate members 30 and 35 should have similar shapes, but they need not be rectangular; and (4) if the peripheries of the plate members 30 and 35 are arcuate (except for the 25 length of the edges of the plates that are connected to the hinge or hinges), a single, arcuate side wall may extend from one - or each - of the plate 16 members 30 and 35, to form the barrier which, with the plate members 30 and 35, prevents access to the cap 13. Benefits and industrial applicability. The present invention provides a cost effective, re-usable device that prevents unauthorised access to the cap of a container which has been filled with a liquid chemical. It can include enhanced security and tracking features. Its use is not restricted to containers of the type illustrated in Figures 1 and 2 of the accompanying drawings. It may be retro-fitted to most containers; it can be constructed to fit particular containers. It may be used with containers of liquid chemicals (especially of hazardous liquid chemicals), in hospitals, in industrial facilities, in the petroleum industry, in mining, and in the pharmaceutical industry. (This list is not exhaustive.)

Claims

1. Apparatus for restricting access to the cap of a container having an opening that is closed by a cap which fits over a cap-receiving wall of the container, said cap-receiving wall extending upwardly from the periphery of said opening, said cap access restricting apparatus comprising a collar member and a lid member, and at least one hinge connecting said collar member to said lid member, said at least one hinge having an axis of rotation, characterised in that: a) said collar member comprises a plate member having an aperture therein that has dimensions such that (1) said cap-receiving wall can pass through said aperture, but (2) when said cap-receiving wall is passed through said aperture and said cap is applied to said cap receiving wall to close said opening, the lower edge of said cap prevents the removal of said plate member of said collar member from said cap-receiving wall; b) a locking bar is mounted above the upper surface of said plate member of said collar member, said locking bar being generally horizontal, or arcuate and generally horizontal; c) said lid member comprises a plate member having a lock mounted thereon in a position such that, when said lid member is rotated about said axis of rotation, so that said plate member of said lid member overlies said plate member of said collar member, said lock is engageable with said locking bar; d) at least one side wall extends from (1) at least part of the periphery of said plate member of said lid member; or (2) at least part of the periphery of said plate member of said collar member; or 18 (3) at least part of the periphery of said plate member of said lid member and at least part of the periphery of said plate member of said collar member; and e) the height of said, or each, side wall is such that, when said lock is engaged with said locking bar, a barrier extending between said plate member of said lid member and said plate member of said collar member is provided by said side wall or walls, and the combination of said barrier and said plate members prevents access to said cap.

2. Cap access restricting apparatus as defined in claim 1, including a flange extending from the top face of said plate member of said collar member; said flange having (a) a shape that corresponds to the end of said lock that is remote from said plate member of said lid member, and (b) dimensions such that when said lid member is rotated about said hinge so that said plate member of said lid member overlies said plate member of said collar member and said lock is engageable with said locking bar, said flange surrounds the end of said lock that is remote from said plate member of said lid member.

3. Cap access restricting apparatus as defined in claim 1 or claim 2, including a post which extends substantially vertically from the top surface of said plate member of said collar member; said post having an eye near the end of said post that is remote from said plate member of said collar member; said post having a length such that, when said lid member is rotated about said at least one hinge so that said plate member of said lid member overlies said plate member of said collar member and said lock is engaged with said locking bar, the end of said post which contains said eye projects through an aperture in said plate member of said lid member. 19

4. Cap access restricting apparatus as defined in claim 3, in which said post extends from the region of said collar member that is remote from said at least one hinge.

5. Cap access restricting apparatus as defined in any preceding claim, in which said plate member of said lid member is an arcuate plate and said lock is positioned within a tube mounted on, or formed integrally with, said plate member of said lid member.

6. Cap access restricting apparatus as defined in any preceding claim, including a bias spring arrangement associated with said at least one hinge, to bias said plate member of said lid member away from said plate member of said collar member.

7. Cap access restricting apparatus as defined in any preceding claim, in which said lock is a slam lock.

8. Cap access restricting apparatus as defined in any preceding claim, including a radio frequency identification device.

9. Cap access restricting apparatus as defined in any preceding claim, including an alarm signal generator adapted to generate an alarm signal when, after said lock is engaged with said locking bar, said plate member of said lid member is moved away from said plate member of said collar member.

10. Cap access restricting apparatus for a container as defined in claim 1, substantially as hereinbefore described with reference to the accompanying drawings. 20

11. A container for a liquid chemical, said container having a filling aperture from which a cap-receiving wall extends outwardly, and a cap which engages with said cap-receiving wall to close said filling aperture; said container being fitted with a cap access restricting apparatus as defined in any preceding claim. Dated this twenty-seventh day of May, 2010, TREVOR DAVID LEISK by his Patent Attorneys DAVIES COLLISON CAVE