WO2007062437A2

WO2007062437A2 - Utility access

Info

Publication number: WO2007062437A2
Application number: PCT/ZA2006/000136
Authority: WO
Inventors: Terence Keith Ashwin; Attila Aranyosi; Cornelius Petrus Lourens
Original assignee: Integra-Set (Pty) Ltd
Priority date: 2005-11-24
Filing date: 2006-11-23
Publication date: 2007-05-31
Also published as: WO2007062437A3

Abstract

A utility access (10) which includes mechanical locking means (12) for locking the utility access and electronic securing means (14) configured to secure the mechanical locking means (12), in use, to render the mechanical locking means (12) inoperable when so secured. In this manner the utility access (10) is only accessible when the electronic securing means (14) releases the locking means (12). Also provided is a lock for a utility access, a manhole cover and a hinge arrangement for a manhole cover.

Description

UTILITY ACCESS

FIELD OF THE INVENTION

This invention relates to a utility access, a manhole cover, a lock, and a hinge arrangement for a manhole cover.

SUMMARY OF THE INVENTION

It is to be appreciated that the term "utility", when referred to in this specification, includes any type of utility, such as an electricity supply, a water supply, a gas supply, sewage conduits, telecommunication lines, and/or the like. It is further to be appreciated that an access generally refers to any form of access point or entrance to such a utility. As such, the access generally includes some form or barrier or closure which prevents access thereto.

According to one aspect of the invention there is provided a utility access which includes mechanical locking means for locking the utility access; and electronic securing means configured to secure the mechanical locking means to render said mechanical locking means inoperable when so secured, so that the utility access is only accessible when the electronic securing means releases the locking means.

It is to be appreciated that the mechanical locking means is only able to unlock once the electronic securing means no longer secures the mechanical locking means.

The mechanical locking means may include a conventional mechanical lock operable with a suitable key, e.g. a deadbolt, a sliding bolt, a locking bar, and/or the like. It is to be appreciated that the mechanical locking means may include any suitably configured locking means for locking a particular access. As such, the type of locking means may be determined by the particular access which is to be locked. The utility access may include a junction box for a particular utility service, such as an electricity distribution box, a telephone junction box, or the like. Accordingly, the mechanical locking means may include a sliding lock bar for locking the junction box, or a sliding bolt locking the access to a frame of the junction box, or the like.

The electronic securing means may include an electrically actuated impediment for securing the sliding lock bar of the junction box, in use, so that the bar is held in place when locked. The electronic securing means may be fitted to the access in manner which prevents tampering with the securing means, e.g. typically on the inside of the box, or the like.

The access may include a manhole cover. It is to be appreciated that manhole covers are generally manufactured from metal or concrete which renders them heavy and difficult to lift from a respective manhole collar. This characteristic ensures that only a person with a specific tool or handle is able to lift a manhole cover in order to gain access to a utility closed off by the manhole cover. As such, it is further to be appreciated that a manhole cover generally defines some specifically shaped and/or configured aperture for receiving a particular handle or tool, i.e. only a specific tool fits into the aperture to lift the cover.

Accordingly, the mechanical locking means may include a removable portion covering a particularly shaped aperture defined by the manhole cover, wherein the removable portion is configured to seal said aperture, when locked in position by the mechanical locking means, so as to prevent insertion of a suitable tool or handle for lifting the manhole cover from a manhole. The removable portion may be hingedly attached to the manhole cover, or the like.

The removable portion may define a line of weakness which is calculated so that a shear force of the removable portion is slightly more than a lifting force necessary to lift the manhole cover, i.e. when the manhole is locked and secured, and excessive force is applied to lift the cover, the removable portion shears to hinder unauthorized access to the manhole. The mechanical locking means may include a movable impediment which prevents the manhole cover from being opened, e.g. a deadbolt sliding into a collar of the manhole, or the like. The movable impediment may be linked to the removable portion so that, when the removable portion is released by the electronic securing means, the impediment is movable to allow opening the access.

The electronic securing means may include a servo motor operated sliding bolt configured to secure the removable portion over the aperture. As such, the electronic securing means may include any electromechanically actuated elements for securing the mechanical locking means. It is to be appreciated that the electronic securing means generally requires some form of actuation means for securing the locking means. The electronic securing means may include an electromagnet for securing the locking means.

The electronic securing means may include a receiver for receiving an electronic identifier signal instructing the securing means to secure or release the mechanical locking means. As such, the receiver may be configured to receive the signal via a communications network. Accordingly, the signal may include a radio frequency signal, a signal via a conductor, and/or the like. For example, the receiver may include a RFID (Radio Frequency Identification) receiver for receiving the signal from a suitable configured RFID tag, or the like.

It is to be appreciated that the electronic securing means is generally configured to only release the mechanical locking means on receipt of a valid identifier signal, i.e. access control functionality. In addition, the electronic securing means may include a transmitter for transmitting a validation request to a remote location so that a received signal is able to be validated for authenticity.

The electronic securing means may include a sensor for sensing a status of the mechanical locking means, i.e. locked or unlocked. The sensor may be configured to sense the status of the access, i.e. open or closed. The sensor may include a reed sensor arrangement, a magnetic proximity sensor arrangement, and optical path sensor arrangement, and/or the like. The electronic securing means may be further configured to transmit a reporting signal to a remote location to report the status of the access and/or the mechanical locking means. It is to be appreciated that this enables a log of access attempts to be created, i.e. a history of access attempts, or the like.

According to a second aspect of the invention there is provided a manhole cover which includes a covering portion hingedly attached to the manhole cover so that, when said covering portion is hinged into a closed position, the covering portion prevents reception of a handle for lifting the cover from a manhole collar, and when the covering portion is hinged into an open position, the covering portion allows a handle to be inserted into an aperture to facilitate lifting of the manhole cover; a locking arm connected to the covering portion, which locking arm is configured to lock the manhole cover to the manhole collar when the covering portion is in the closed position, and which locking arm further is configured to allow the manhole cover to be lifted from the manhole collar when the covering portion is in the open position; an electrically actuated sliding bolt configured to secure the locking arm in the closed position, so that the covering portion is only displaceable into the open position if the sliding bolt releases the locking arm; a processor arranged in communication with the sliding bolt, which processor is configured to control actuation of the sliding bolt on receipt of a valid electronic identifier; and a receiver arranged in communication with the processor, which receiver is configured to receive an identifier from a user.

The covering portion may define an opening for receiving the handle in the open position. Accordingly, the covering portion may be configured so that a handle defines a lever when received by the opening in the covering portion to enable more efficient lifting of the cover from the collar, i.e. a lever action, or the like.

Otherwise, the covering portion may cover an aperture defined by the manhole cover in the closed position, so that a suitable handle is unable to be inserted into said aperture to lift the cover. The locking arm may lock the manhole cover to the collar by a portion of the arm extending beyond a boundary of the cover in the closed position, which portion of the arm then fits into a suitable cavity of the collar, or the like.

The sliding bolt may include a servo motor or solenoid for electrically actuating said bolt in order to secure the locking arm in the closed position. The sliding bolt may secure the locking arm by sliding through a suitable aperture in the arm, in use, when the arm is in the closed position, so that the arm is secured in place.

The processor may be configured to compare the received identifier signal with a list of valid signals, i.e. a look-up table, or the like. The processor may include a transmitter for transmitting the received identifier signal to a remote location for validation purposes. The processor may be configured to log details of a received identifier signal, e.g. time and date of receiving the identifier, or the like. The processor may be configured to transmit an alert to a remote location upon receiving an invalid identifier.

In addition, the processor may include a sensor configured to sense tampering with the manhole. The processor may be configured to transmit an alert to a remote location upon the sensor sensing tampering with the cover.

It is to be appreciated that the processor generally performs its various tasks and configurations by executing a specific set of instructions, i.e. software.

The receiver may include a RFID receiver for receiving the signal from a suitable RFID tag, or the like. The receiver may be configured to receive the identifier signal via a wire or cable.

The manhole cover may be manufactured from chequer plate, or the like.

According to a third aspect of the invention there is provided a lock for a utility access, which lock includes an electrically actuated sliding bolt; a receiver configured to receive an identifier; a processor arranged in communication with said bolt and receiver, which processor is configured to validate the received identifier, and to actuate the bolt according to the validity of the received identifier, so that the access is only accessible with a valid identifier; and a housing for housing the bolt, receiver and processor.

The sliding bolt may be actuated by a servomotor. The sliding bolt may include a solenoid type bolt.

The receiver may include a RFID (Radio Frequency Identification) receiver for receiving an identifier from a RFID tag. The receiver may include a scanner for scanning a magnetic identifier, e.g. a magnetic strip on a card, or the like. The receiver may include a scanner for scanning some form of optical identifier, e.g. a barcode scanner, a retinal scanner, or the like. It is to be appreciated that the receiver is for obtaining the identifier from a user, and that the identifier generally includes any suitable identifier able to uniquely identify a user.

The identifier may include a code uniquely associated with a specific person, or a key, or the like. It is to be appreciated that the identifier is able to link a request for access to the lock to a certain person so that record may be kept of when which person accessed the lock for what duration, and/or the like.

The processor may validate the identifier by comparing the received identifier to a list of valid identifiers, e.g. a look-up table, a roster of scheduled access, and/or the like. As such, the processor may include a memory arrangement for storing the list of valid identifiers for validation purposes. The processor may be configured to be updated with valid identifiers, such as via the receiver, or the like, i.e. a technician updates the list of valid identifiers at the lock itself.

The processor may validate the identifier by performing a certain calculation on the identifier which, if the identifier is valid, yields a predetermined result.

The processor may be configured to receive updates of valid identifiers from a remote server via the receiver, i.e. an updated list of valid identifiers, or the like. The processor may be configured to validate the identifier by transmitting the received identifier to a remote location to assist in validating by transmitting an authorizing signal back to the processor so that the processor is able to control the locking means accordingly. Accordingly, the processor may include a transmitter for transmitting the received identifier to the remote location. The transmitter may be configured to transmit signals via cable and/or wirelessly.

The processor may be configured to monitor the status of the lock, e.g. if the lock is locked or unlocked, and/or the like. The processor may log the status of the lock.

Accordingly, the lock may be configured so that the log is retrievable from the lock, such as locally via the receiver, or the like, e.g. a technician can download the log directly from the lock. Otherwise, the processor may be configured to transmit the status log of the access to a remote location via the transmitter.

The lock may include energizing means for energizing the locking means, input, and processor. The energizing means may include an electrochemical cell, e.g. a battery, or the like.

In addition, the lock may be configured to draw electrical power from a key which provides the identifier via the receiver, e.g. an electrochemical cell in a key provides operating power through induction principles, or the like.

It is to be appreciated that the processor generally performs its various tasks and configurations by executing a specific set of instructions, e.g. a software package.

The housing may be manufactured from damage and/or corrosion resistant material such as a suitable polymer, or the like. The housing may define a U- shaped portion wherein a slot is defined in the housing with the sliding bolt being configured to slide from one side of the U-shaped portion to the other. The housing may define at least one exit channel so that any dirt and/or fluid entering the housing is able to drain out of the housing. The housing may further be shaped and configured to define a guide channel for guiding a suitably configured key to the receiver located in said housing. The guiding channel may be shaped in an inwardly tapered manner to serve a self-cleaning function.

According to a fourth aspect of the invention there is provided a hinge arrangement for a manhole cover, which arrangement includes a mounting portion for mounting the hinge arrangement to a manhole collar; a guiding portion for guiding an edge of a suitably configured manhole cover so that edge is able to slide on the guiding portion when the cover is hinged on the arrangement; and a securing portion for securing a protrusion of the manhole cover when the cover is in an upright and open position, wherein the cover is removable from the arrangement by disengaging the cover from the securing means.

The mounting portion may include a mounting plate defining apertures for mounting the hinge arrangement to the collar with bolts, rivets, or any suitable fastener.

The guiding portion may include at least one hook structure for receiving the edge of the cover. The hook structure may be cantilevered to the securing portion. The hook structure may define a slot when cantilevered to the securing portion.

The securing portion may include a plate which defines an aperture wherein the protrusion of the cover is placeable so that a weight of the cover ensures that the protrusion is retained by the aperture, i.e. gravity keeps the protrusion wedged in the aperture.

The mounting portion and the securing portion may be attached together to form an L-shape.

BRIEF DESCRIPTION OF THE DRAWINGS

The invention is now described, by way of non-limiting examples, with reference to the accompanying drawings wherein Figure 1 shows, in diagrammatic view, an example of an inside of a utility access, in accordance with the invention;

Figure 2 shows, in diagrammatic view, an unlocked configuration of the utility access as shown in Figure 1 ; Figure 3 shows, in side sectional view, a manhole cover, in accordance with the invention, when in a closed position;

Figure 4 shows, in side sectional view, the manhole cover shown in figure 3 when in an open position;

Figure 5 shows, in top diagrammatic view, a lock for a utility access, in accordance with the invention;

Figure 6 shows, in side diagrammatic view, the lock of Figure 5;

Figure 7 shows, in front perspective view, a hinge arrangement for a manhole cover, in accordance with the invention; and

Figure 8 shows, in side perspective view, the hinge arrangement shown in Figure 7.

DETAILED DESCRIPTION OF THE INVENTION

With reference to the accompanying drawings, a utility access, in accordance with the invention, is generally indicated by reference numeral 10.

In the embodiment of the invention shown in Figure 1 , the utility access 10 is a junction box 18 for telephone connections. It is to be appreciated that, in other embodiments of the invention, the utility access 10 may include any form of access to any type of utility or utile objects. As such, the utility access 10 may include a different type of junction box for a particular utility service, such as an electricity distribution box, a telephone junction box, or the like.

In general, the utility access 10 includes mechanical locking means 12, and electronic securing means 14.

The mechanical locking means 14 is for locking the utility access 10. In different embodiments of the invention, the mechanical locking means 14 may include a conventional mechanical lock operable with a suitable key, e.g. a deadbolt, a sliding bolt, a locking bar, and/or the like. It is to be appreciated that the mechanical locking means 14 includes any suitably configured locking means for locking a particular access. As such, the type of locking means 14 is determined by the particular access which is to be locked.

In the embodiment shown, the junction box 18 is viewed from the inside of the box 18. The mechanical locking means 14 includes a sliding lock bar for locking the junction box 18 with a rotatable bolt 20 locking a door or closure of the access 10 to a frame of the junction box 18.

The electronic securing means 14 is configured to secure the mechanical locking means 20 in order to render said mechanical locking means inoperable 20 when so secured. In this manner, the utility access 10 is only accessible when the electronic securing means 14 releases the locking means 20. It is to be appreciated that the mechanical locking means 20 is only able to unlock once the electronic securing means 14 no longer secures the mechanical locking means 20.

In the embodiment shown, the electronic securing means 14 includes an electrically actuated impediment 16 for securing the sliding lock bar 12 via the locking bolt 20 of the junction box 18, in use, so that the bar 12 is held in place when locked. The electronic securing means 14 is generally fitted to the access 10 in manner which prevents tampering with the securing means 14, e.g. typically on the inside of the box 18, as shown.

In use, the impediment 16 recedes into the securing means 14 to allow the bolt 20 to rotate out of the aperture defined in the securing means 14, as shown.

Similarly, to secure the bolt 20, the impediment 16 moves from the securing means 14 to prevent the bolt 20 from rotating out of the securing means 14. Figure 2 shows an embodiment where the mechanical locking bar 12 and bolt 20 has been released by the securing means 14. By turning a handle (not shown), the locking bar 12 is movable to open the access 10, as shown.

In a yet further embodiment, the access 10 includes a manhole cover 30.

It is to be appreciated that manhole covers are generally manufactured from metal or concrete which typically renders such covers heavy and difficult to lift from a respective manhole collar 32. This characteristic ensures that only a person with a specific tool or handle is able to lift a manhole cover in order to gain access to a utility closed off by the manhole cover 34. As such, it is further to be appreciated that a manhole cover generally defines some specifically shaped and/or configured aperture for receiving a particular handle or tool, i.e. only a specific tool fits into the aperture to lift the cover.

Accordingly, in the embodiment shown, the mechanical locking means 38 includes a removable portion 36 covering a particularly shaped aperture defined by the manhole cover 34. The removable portion 36 is configured to seal said aperture, when locked in position by the mechanical locking means 38, so as to prevent insertion of a suitable tool or handle for lifting the manhole cover 34 from a manhole collar 32. The removable portion 36 is hingedly attached to the manhole cover 34.

The removable portion 36 generally defines a line of weakness (not shown) which is calculated so that a shear force of the removable portion 36 is slightly more than a lifting force necessary to lift the manhole cover 34, i.e. when the manhole

30 is locked and secured, and excessive force is applied to lift the cover 34, the removable portion shears 36 to hinder unauthorized access to the manhole 30.

The mechanical locking means 38 includes a movable impediment which prevents the manhole cover from 34 being opened. It is to be appreciated that the movable impediment 38 is linked to the removable portion 36 so that, when the removable portion 36 is released by the electronic securing means 42, the impediment

38 is movable to allow opening the access 30.

The electronic securing means 42 includes a servo motor operated sliding bolt arrangement 48 configured to secure the removable portion 36 over the aperture in the cover 34. As such, it is to be appreciated that the invention provides that the electronic securing means 42 may include any electromechanically actuated elements for securing the mechanical locking means 38.

The electronic securing means 42 includes a receiver 46 for receiving an electronic identifier signal instructing the securing means 42 to secure or release the mechanical locking means 38. As such, in the embodiment shown, the receiver 46 is a RFID (Radio Frequency Identification) receiver for receiving the signal from a suitable configured RFID tag. Accordingly, the manhole cover 30 includes a hole 44 through which a suitably configured key (not shown) may be inserted to bring a RFID tag in contact with the receiver 46. The hole 44 is typically tapered towards the upper part thereof to serve a self cleaning function. It is to be appreciated that the receiver 46 may be situated in a different location in different embodiments of the invention. As such, the positioning of the receiver 46 can be chosen depending on the configuration of the manhole 30, or the like.

It is further to be appreciated that the electronic securing means 42 is generally configured to only release the mechanical locking means 38 on receipt of a valid identifier signal, i.e. facilitates access control functionality. In addition, in a further embodiment of the invention, the electronic securing means 42 includes a transmitter for transmitting a validation request to a remote location so that a received signal is able to be validated for authenticity, i.e. the authenticity of the received identifier signal is checked at a remote location.

In a yet further embodiment, the electronic securing means 42 includes a sensor for sensing a status of the mechanical locking means 38, i.e. locked or unlocked. The sensor is further configured to sense the status of the access 30, i.e. open or closed. The sensor typically includes a reed sensor arrangement, a magnetic proximity sensor arrangement, and optical path sensor arrangement, and/or the like.

In a further embodiment, the electronic securing means 42 is configured to transmit a reporting signal to a remote location to report the status of the access 30 and/or the mechanical locking means 38. It is to be appreciated that this enables a log of access attempts to be created, i.e. a history of access attempts.

With reference to Figure 3, the invention specifically provides for a manhole cover 30 which includes a covering portion 36, a locking arm 38, a sliding bolt and processor arrangement 48.

The covering portion 36 is hingedly attached to the manhole cover 34 so that, when said covering portion 36 is hinged into a closed position as shown in Figure 3, the covering portion 36 prevents reception of a handle for lifting the cover 34 from a manhole collar 32. As such, when the covering portion 36 is hinged into an open position, as shown in Figure 4, the covering portion 36 allows a handle 50 to be inserted into an aperture to facilitate lifting of the manhole cover 34 from the collar 32.

In the embodiment shown, the covering portion 36 defines an opening for receiving the handle 50 in the open position. Accordingly, the covering portion 36 is configured so that the handle 50 defines a lever when received by the opening in the covering portion 36 to enable more efficient lifting of the cover 34 from the collar 32, i.e. a lever action, or the like.

In a further embodiment of the invention (not shown), the covering portion 36 covers an aperture defined by the manhole cover 34 when the covering portion 36 is in the closed position. In this manner a suitable handle is unable to be inserted into said aperture to lift the cover 34, i.e. impedes the opening of the manhole 30.

The locking arm 38 is connected to the covering portion 36, as shown, with the locking arm 38 is configured to lock the manhole cover 34 to the manhole collar 32 when the covering portion 36 is in the closed position. The locking arm 38 is also configured to allow the manhole cover 34 to be lifted from the manhole collar 32 when the covering portion 36 is in the open position, as shown in Figure 4.

The electrically actuated sliding bolt 48 is configured to secure the locking arm 38 in the closed position, so that the covering portion 36 is only displaceable into the open position if the sliding bolt 48 releases the locking arm 38.

The sliding bolt arrangement 48 is actuated with a servo motor or solenoid in order to secure the locking arm 38 in the closed position. The sliding bolt typically secures the locking arm 38 by sliding through a suitable aperture or hole in the arm 38, in use, when the arm 38 is in the closed position, so that the arm 38 is secured in place.

The processor 48 is arranged in communication with the sliding bolt, as shown, which processor 48 is configured to control actuation of the sliding bolt on receipt of a valid electronic identifier. The processor 48 is generally configured to compare the received identifier signal with a list of valid signals, i.e. a look-up table, or the like. Otherwise, in further embodiments, the processor 48 includes a transmitter for transmitting the received identifier signal to a remote location for validation purposes.

The processor 48 is typically also configured to log details of a received identifier signal, e.g. time and date of receiving the identifier, or the like. In a yet further embodiment of the invention, the processor 48 is configured to transmit an alert to a remote location upon receiving an invalid identifier, i.e. typically when someone is trying to gain unauthorized access to the manhole 30, or the like.

In addition, the processor 48 typically includes a sensor (not shown) configured to sense tampering with the manhole 30. The processor 48 is then configured to transmit an alert to a remote location upon the sensor sensing tampering with the cover 34, or the like.

It is to be appreciated that the processor 48 generally performs its various tasks and configurations by executing a specific set of instructions, i.e. software.

The receiver 46 is arranged in communication with the processor 48, with the receiver 46 being configured to receive the identifier from a user. The receiver 46 includes a RFID receiver for receiving the signal from a suitable RFID tag, or the like. In further embodiments, the receiver 46 is configured to receive the identifier signal via a wire or cable.

The manhole cover 34 includes a channel 44 to allow a suitable RFID key to be brought into contact with the receiver 46, to supply the identifier to the processor 48.

In a preferred embodiment, the manhole cover 34 is manufactured from chequer plate.

In use, a key is inserted into the channel 44, which key is a RFID tag. The receiver 46 receives the RFID identifier from the key and the processor 48 validates the identifier. If the identifier is valid, the processor activates the servo motor bolt so the bolt releases the locking arm 38.

Once the locking arm 38 is released, the covering portion 36, being connected to the locking arm 38, is also released so that the covering portion can be hinged away from the cover 34. The covering portion defines a hole for receiving the handle 50, so that the handle forms a lever whereby the cover can be lifted from the collar 32.

A user is then able to lift the cover 34 from the collar 32. The procedure for locking the manhole 30 is done in reverse. The cover 34 is replaced on the collar 32, and the covering portion is hinged to lie against the cover 34. This action also hinges the locking arm 38 into the securing means 42. The key is inserted and the processor actuates the bolt to secure the locking arm 38 in place, locking the cover 34.

Referring now to Figures 5 and 6, a lock 60 for a utility access includes a sliding bolt 64, a receiver 66, a processor 70, and a housing 60 for housing these components. It is to be appreciated that the lock finds particular application as a lock for a utility access, as described above.

The sliding bolt 64 is an electrically actuated sliding bolt. The sliding bolt 64 is typically actuated by a servomotor. In a further embodiment, the sliding bolt 64 includes a solenoid type bolt, or the like.

The receiver 66 is configured to receive an identifier. In a preferred embodiment, the receiver 66 includes a RFID (Radio Frequency Identification) receiver for receiving an identifier from a RFID tag. In further embodiments, the receiver 66 includes a scanner for scanning a magnetic identifier, e.g. a magnetic strip on a card, or the like. The receiver 66 may also include a scanner for scanning some form of optical identifier, e.g. a barcode scanner, a retinal scanner, or the like. It is to be appreciated that the receiver 66 is for obtaining the identifier from a user, and that the identifier generally includes any suitable identifier able to uniquely identify a user. As such, the identifier generally includes any electronic code uniquely associated with a specific person, or a key, or the like. It is to be appreciated that the identifier is able to link a request for access to the 60 lock to a certain person so that record may be kept of when which person accessed the lock for what duration, and/or the like.

The processor 70 is arranged in communication with said bolt 64 and receiver 66. The processor 70 controls a servo motor 62 for actuating the bolt 64. The processor 70 is configured to validate the received identifier, and to actuate the bolt 64 according to the validity of the received identifier, so that the access (not shown) is only accessible with a valid identifier.

The processor 70 validates the identifier by comparing the received identifier to a list of valid identifiers, e.g. a look-up table, a roster of scheduled access, and/or the like. As such, the processor 70 typically includes a memory arrangement (not shown) for storing the list of valid identifiers for validation purposes. In one embodiment, the processor 70 is configured to be updated with valid identifiers, such as via the receiver, or the like, i.e. a technician updates the list of valid identifiers at the lock itself.

In a further embodiment, the processor 70 validates the identifier by performing a certain calculation on the identifier which, if the identifier is valid, yields a predetermined result.

The processor 70 may also be configured to receive updates of valid identifiers from a remote server via the receiver, i.e. an updated list of valid identifiers, or the like.

In a yet further embodiment of the invention, the processor 70 is configured to validate the identifier by transmitting the received identifier to a remote location to assist in validating by transmitting an authorizing signal back to the processor 70 so that the processor 70 is able to control the servo motor 62 accordingly.

Accordingly, the processor 70 then includes a transmitter 68 for transmitting the received identifier to the remote location. The transmitter 68 may be configured to transmit signals via cable and/or wirelessly. The processor 70 is typically configured to monitor the status of the lock 60, e.g. if the lock 60 is locked or unlocked, and/or the like. The processor 70 logs the status of the lock 60 and transmits said status in predetermined intervals.

Accordingly, the lock 70 is configured so that the log is retrievable from the lock 60, locally via the transmitter 68, or the like, e.g. a technician can download the log directly from the lock. Otherwise, the processor 70 can be configured to transmit the status log of the access to a remote location via the transmitter 68.

The lock 60 typically includes energizing means for energizing the locking means, input, and processor. The energizing means may include an electrochemical cell, e.g. a battery, or the like.

In a preferred embodiment, the lock 60 is configured to draw electrical power from a key which provides the identifier via the receiver 66, e.g. an electrochemical cell in a key provides operating power through induction principles, or the like.

It is to be appreciated that the processor 70 generally performs its various tasks and configurations by executing a specific set of instructions, e.g. a software package.

The housing is typically manufactured from damage and/or corrosion resistant material such as a suitable polymer, or the like. The housing defines a U- shaped portion 74 wherein a slot is defined in the housing with the sliding bolt 64 being configured to slide from one side of the U-shaped portion 74 to the other.

The housing includes a drainage arrangement shown in Figure 6. As such, the housing defines exit channels 78 so that any dirt and/or fluid entering the housing is able to drain out of the housing. The housing may further be shaped and configured to define a guide channel (not shown) for guiding a suitably configured key to the receiver located in said housing. This guiding channel may be shaped in an inwardly tapered manner to serve a self-cleaning function. This invention further provides for a hinge arrangement 80 for a manhole cover. The hinge arrangement 80 includes a mounting portion 82, two guiding portions 84, and a securing portion 86.

The mounting portion 82 is for mounting the hinge arrangement 80 to a manhole collar. The mounting portion 82 includes a mounting plate defining apertures 90 for mounting the hinge arrangement 80 to the collar with bolts, rivets, or any suitable fastener.

The guiding portions 84 are for guiding an edge of a suitably configured manhole cover so that edge is able to slide on the guiding portions 84 when the cover is hinged on the arrangement 80. The guiding portions 84 include hook structures for receiving and guiding the edge of the cover. The hook structures are cantilevered to the securing portion 86. The hook structures define a slot when cantilevered to the securing portion 86.

The securing portion 86 is for securing a protrusion of the manhole cover when the cover is in an upright and open position. It is to be appreciated that the cover is removable from the arrangement 80 by disengaging the cover from the securing means, i.e. lift the protrusion of the cover from the aperture 88.

As shown, the securing portion 86 includes a plate which defines an aperture 88 wherein the protrusion of the cover is placeable so that a weight of the cover ensures that the protrusion is retained by the aperture 88, i.e. gravity keeps the protrusion wedged in the aperture 88.

The mounting portion 83 and the securing portion 86 is generally attached together to form an L-shape, as shown, when viewed from the side.

Although only certain embodiments of the invention have been described herein, it will be understood by any person skilled in the art that other modifications, variations, and possibilities of the invention are possible. Such modifications, variations and possibilities are therefore to be considered as falling within the spirit and scope of the invention and hence forming part of the invention as herein described and/or exemplified. It shall be understood that the examples are provided for illustrating the invention further and to assist a person skilled in the art with understanding the invention and is not meant to be construed as unduly limiting the reasonable scope of the invention.

The Inventors regard it as an advantage that the utility access restricts access to a utility without a valid electronic identifier. The Inventors regard it as a further advantage that the utility access allows access control to a utility which may be monitored and remotely controlled.

The Inventors regard it as an advantage the manhole cover prevents access to a manhole without a person having a valid and authentic electronic key.

The Inventors regard it as an advantage the lock is able to withstand harsh conditions whilst still being able to function.

The Inventors regard it as an advantage that the hinge arrangement is able to locate a manhole cover whilst said cover is opened and/or closed. The Inventors regard it as a yet further advantage that the hinge arrangement is able to secure a manhole cover in an upright position, and that the cover is easily removable from the hinge arrangement.

Claims

1. A utility access which includes mechanical locking means for locking the utility access; and electronic securing means configured to secure the mechanical locking means to render said mechanical locking means inoperable when so secured, so that the utility access is only unlockable when the electronic securing means releases the locking means.

2. The utility access as claimed in claim 1 , wherein the electronic securing means includes an electrically actuated impediment for securing the locking means.

3. The utility access as claimed in either one of claims 1 or 2, wherein the electronic securing means is fitted to the access in a manner which prevents tampering with the securing means.

4. The utility access as claimed in any one of claims 1 to 3, which includes a manhole cover which defines a specifically shaped and/or configured aperture for receiving a particular handle or tool for lifting the cover from a manhole.

5. The utility access as claimed in claim 4, wherein the mechanical locking means includes a movable impediment which prevents the manhole cover from being opened or lifted from a manhole.

6. The utility access as claimed in claim 5, wherein the mechanical locking means includes a removable portion covering the particularly shaped aperture defined by the manhole cover, the removable portion being configured to seal said aperture when locked in position by the mechanical locking means, so as to prevent insertion of the suitable tool or handle for lifting the manhole cover from a manhole.

7. The utility access as claimed in claim 6, wherein the removable portion is hingedly attached to the manhole cover.

8. The utility access as claimed in either one of claims 6 or 7 wherein the removable portion defines a line of weakness which is calculated so that a shear force of the line of weakness is slightly more than a lifting force necessary to lift the manhole cover from a manhole.

9. The utility access as claimed in claim 6, wherein the impediment is linked to the removable portion so that, when the removable portion is released by the electronic securing means, the impediment is movable to allow opening the access.

10. The utility access as claimed in claim 6, wherein the electronic securing means includes a servo motor operated sliding bolt configured to secure the removable portion over the aperture.

11. The utility access as claimed in any one of claims 1 to 10, wherein the electronic securing means includes a receiver for receiving an electronic identifier signal instructing the securing means to secure or release the mechanical locking means.

12. The utility access as claimed in claim 11 , wherein the electronic securing means includes a transmitter for transmitting a validation request to a remote location so that a received identifier signal is able to be validated for authenticity.

13. The utility access as claimed in any one of claims 1 to 12, wherein the electronic securing means includes a sensor for sensing a status of the mechanical locking means.

14. The utility access as claimed in claim 13, wherein the sensor is configured to sense an open or closed status of the access.

15. The utility access as claimed in either one of claims 13 or 14, wherein the electronic securing means is configured to transmit a reporting signal to a remote location to report the status of the access and/or the mechanical locking means.

16. A manhole cover which includes a covering portion hingedly attached to the manhole cover so that, when said covering portion is hinged into a closed position, the covering portion prevents reception of a handle for lifting the cover from a manhole collar, and when the covering portion is hinged into an open position, the covering portion allows a handle to be inserted into an aperture to facilitate lifting of the manhole cover; a locking arm connected to the covering portion, which locking arm is configured to lock the manhole cover to the manhole collar when the covering portion is in the closed position, and which locking arm further is configured to allow the manhole cover to be lifted from the manhole collar when the covering portion is in the open position; an electrically actuated sliding bolt configured to secure the locking arm in the closed position, so that the covering portion is only displaceable into the open position if the sliding bolt releases the locking arm; a processor arranged in communication with the sliding bolt, which processor is configured to control actuation of the sliding bolt on receipt of a valid electronic identifier; and a receiver arranged in communication with the processor, which receiver is configured to receive an identifier from a user.

17. The manhole cover as claimed in claim 16, wherein the covering portion defines an opening for receiving the handle in the open position.

18. The manhole cover as claimed in claim 17, which includes a handle with the covering portion configured so that said handle defines a lever when received by the opening in the covering portion to enable more efficient lifting of the cover from the collar.

19. The manhole cover as claimed in claim 17, wherein the covering portion covers an aperture defined by the manhole cover when in the closed position, so that a suitable handle is unable to be inserted into said aperture to lift the cover.

20. The manhole cover as claimed in any one of claims 16 to 19, wherein the locking arm locks the manhole cover to the collar by a portion of the arm extending beyond a boundary of the cover in the closed position, which portion of the arm then fits into a suitable cavity of the collar.

21. The manhole cover as claimed in any one of claims 16 to 20, which includes a servo motor or solenoid for electrically actuating a sliding bolt into an aperture of the locking arm when the arm is in the closed position in order to secure the locking arm in the closed position.

22. The manhole cover as claimed in any one of claims 16 to 21 , wherein the processor is configured to compare the received identifier signal with a list of valid signals.

23. The manhole cover as claimed in any one of claims 16 to 22, wherein the processor includes a transmitter for transmitting the received identifier signal to a remote location for validation purposes.

24. The manhole cover as claimed in any one of claims 16 to 23, wherein he processor is configured to log details of a received identifier signal.

25. The manhole cover as claimed in any one of claims 22 to 24, wherein the processor is configured to transmit an alert to a remote location upon receiving an invalid identifier.

26. The manhole cover as claimed in any one of claims 16 to 25, which is manufactured from chequer plate.

27. A lock for a utility access, which lock includes an electrically actuated sliding bolt; a receiver configured to receive an identifier; a processor arranged in communication with said bolt and receiver, which processor is configured to validate the received identifier, and to actuate the bolt according to the validity of the received identifier, so that the access is only accessible with a valid identifier; and a housing for housing the bolt, receiver and processor.

28. The lock as claimed in claim 27, wherein the processor validates the identifier by performing a certain calculation on the identifier which, if the identifier is valid, yields a predetermined result.

29. The lock as claimed in either one of claims 27 or 28, wherein the processor is configured to receive updates of valid identifiers from a remote server via the receiver.

30. The lock as claimed in any one of claims 27 to 29, wherein the processor is configured to monitor the status of the lock.

31. The lock as claimed in any one of claims 27 to 30, which is configured to draw electrical power from a key which provides the identifier via the receiver.

32. The lock as claimed in any one of claims 27 to 31 , wherein the housing defines a U-shaped portion wherein a slot is defined in the housing with the sliding bolt being configured to slide from one side of the U-shaped portion to the other.

33. The lock as claimed in claim 32, wherein the housing defines at least one exit channel so that any dirt and/or fluid entering the housing is able to drain out of the housing.

34. A hinge arrangement for a manhole cover, which arrangement includes a mounting portion for mounting the hinge arrangement to a manhole collar; a guiding portion for guiding an edge of a suitably configured manhole cover so that edge is able to slide on the guiding portion when the cover is hinged on the arrangement; and a securing portion for securing a protrusion of the manhole cover when the cover is in an upright and open position, wherein the cover is removable from the arrangement by disengaging the cover from the securing means.

35. The hinge arrangement as claimed in claim 34, wherein the mounting portion includes a mounting plate defining apertures for mounting the hinge arrangement to the collar.

36. The hinge arrangement as claimed in claim 34, wherein the guiding portion includes at least one hook structure for receiving the edge of the cover.

37. The hinge arrangement as claimed in claim 36, wherein the hook structure is cantilevered to the securing portion.

38. The hinge arrangement as claimed in either one of claims 36 or 37, wherein the hook structure defines a slot when cantilevered to the securing portion.

39. The hinge arrangement as claimed in any one of claims 34 to 38, wherein the securing portion includes a plate which defines an aperture wherein the protrusion of the cover is placeable so that a weight of the cover ensures that the protrusion is retained by the aperture.

40. The hinge arrangement as claimed in any one of claims 34 to 39, wherein the mounting portion and the securing portion are attached together to form an L-shape.

41. A utility access as claimed on claim 1 , a manhole cover as claimed in claim 16, a lock for a utility access as claimed in claim 27, or a hinge arrangement for a manhole cover as claimed in claim 34, substantially as herein described and illustrated.

42. A new utility access, a new manhole cover, a new lock, or a new hinge arrangement for a manhole cover as hereinbefore described.