US20060175942A1 - High capacity drawer with mechanical indicator for a dispensing device - Google Patents

Abstract

One aspect of the invention relates to an assembly comprising a plurality of bins with a plurality of lids associated therewith. Each of the bins has a lock assembly that includes a catch operable to lock the lid in its closed position and a mechanical indicator responsive to the catch. Another aspect of the invention relates to an automated dispensing cabinet that includes a control computer and a plurality of row assemblies therein. Each row assembly has bins that include a tabbed lid, a lock assembly with a catch operable to engage and disengage the tab, and an indicator responsive to the lock assembly. Methods for dispensing from and restocking the remote dispensing systems are also given, as well as a method for indicating which item is to be dispensed from one of a plurality of bins.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS
• This application is a divisional of U.S. application Ser. No. 10/313,554, filed Dec. 6, 2002, which is hereby incorporated herein in its entirety by reference.
BACKGROUND
• 1. Field of the Invention
• The invention relates generally to an apparatus and method for providing access to items to be dispensed, and relates more particularly to the automatic dispensing of medical supplies. The invention further relates to an apparatus and method for reducing the amount of power consumed by an automatic dispensing system.
• 2. Description of the Related Art
• In typical medical facilities (for example, hospitals, clinics, rest homes, etc), medical supplies are maintained in centralized storage locations and delivered to remote locations (for example, an emergency room, patient ward, etc.) as needed. Once delivered, the medical supplies are then dispensed to a patient. “Medical supply” is intended to include, among others, any item that is administered to or dispensed for a patient or used by a medical caregiver to treat a patient (for example, pharmaceuticals, syringes, sterilized bandages, scalpels, etc.). The invention has been described herein with reference to the dispensing of medical supplies, but it should be recognized that the invention is applicable to fields other than the medical field.
• A variety of systems are used for transferring (i.e., from the storage location to the remote locations) and for dispensing (i.e., from the remote locations to the patient) the medical supplies. A system may use, for example, mobile dispensing carts which are stocked at the centralized storage area and then wheeled to the remote location. The medical supplies may then be dispensed directly from the mobile dispensing cart for administering to the patient. Alternatively, a dispensing system may use a stationary dispensing cabinet located at the remote location. Medical supplies are dispensed from the dispensing cabinet for later administering to the patient. A restocking cart, loaded with replacement medical supplies from the centralized storage location, is used to replenish the stationary dispensing cabinet.
• Of particular interest to the present invention are dispensing systems which dispense items which require close monitoring and control. A variety of schemes have been proposed for providing secured access to items that are held within such dispensing systems, including locking the items within the carts or allowing access to only one item at a time (commonly referred to as “single dose” or “unit dose” dispensing). In addition to providing secure access, the schemes direct the user to the location within the dispensing system of the item to be dispensed.
• One such system is described in related U.S. Pat. No. 5,745,366 entitled “Pharmaceutical Dispensing Device and Methods” and U.S. Pat. No. 5,905,653 entitled “Methods and Devices for Dispensing Pharmaceutical and Medical Supply Items.” The system controls access to items to be dispensed and maintains an inventory of the items. The system includes a dispensing unit having a plurality of storage locations distributed within an enclosure. The storage locations may include a multiplicity of lockable receptacles disposed within at least some of the storage locations. The storage locations and the individual lockable receptacles may have sensors and indicator lights associated therewith.
• A processor is operable to receive user input and, in response to the input, is operable to activate an indicator light corresponding to the storage location associated with the item to be dispensed. The processor activates locks to prevent access to non-selected storage locations. The processor unlocks the individual receptacle (within the selected storage location) containing the item to be dispensed and activates the indicator light corresponding to the unlocked receptacle. The processor is also connected to receive feedback signals from the receptacle-associated sensors, such that when the unlocked receptacle is opened by a user, a feedback signal is sent to the processor indicating that the item has been dispensed.
• Another such system is described in related U.S. Pat. Nos. 6,109,774 entitled “Drawer Operating System” and U.S. Pat. No. 6,065,819 entitled “Jerk-Resistant Drawer Operation System.” The patents disclose a drawer operating system for controlling a plurality of elongated drawers having a plurality of bins consecutive with one another along a sliding direction for holding various dispensable items. The drawers are housed in an array in a cabinet, each drawer arranged to move independently between a closed position and graduated, progressively opened positions to allow access to one or more bins and the contents stored therein. The system controls access to the bins by only allowing the drawer to travel the distance necessary to expose the next bin containing the item. For example, if a drawer has five bins each containing the desired item, the system will only allow the drawer to move to a position in which the first bin is exposed. After the first bin is emptied, the system will only allow the drawer to move to a position in which the second bin is exposed. The process may be repeated until all five bins are emptied. The system includes a keyboard for inputting coded information concerning the particular item needed and information as to the party entering the information.
• U.S. Pat. No. 6,011,999 entitled “Apparatus for Controlled Dispensing of Pharmaceutical and Medical Supplies” discloses a system for controlled dispensing of pharmaceutical and medical supplies. The system includes a cabinet having a plurality of drawers, each having a plurality of receptacles. Each receptacle is sized to hold one item and has an identifier associated therewith. Locks are provided for securing the lid. The locks include an electrically responsive actuator wire, which in response to an electrical current supplied to the electrically responsive actuator wire, causes the lock to engage and disengage the lid. A processor is in communication with the locks and is configured to send a signal to the electrically responsive actuator wire to actuate the lid. The lid is spring biased and includes a colored indicator on an inner portion of the lid, such that when unlocked, the lid pops open and the indicator is exposed.
• U.S. Pat. No. 6,116,461 entitled “Method and Apparatus for the Dispensing of Drugs” discloses another dispensing system. The system includes modular receptacles which are filled and transported to remote automatic dispensing machines for later retrieval and distribution. The system includes the loading, refilling, and replacement of the modular receptacles at various stages in the process of the invention. The system includes a receptacle having a lockable lid. When required an electronic circuit causes a latch to be actuated, thus opening the lockable lid. The lid has a spring in the hinge assembly which pushes the lid open when the latch is freed, thus indicating to the user the correct receptacle.
• U.S. Pat. No. 5,520,450 discloses a supply station with an internal computer. The supply station is comprised of a cabinet having a plurality of lockable doors. Information is provided to the computer which unlocks the doors and simultaneously and automatically updates a patient's record, billing information and hospital inventory. Relevant data may be displayed on a display or printed on a sheet of paper by a printer connected to the computer.
• U.S. Pat. No. 5,346,297 discloses an auxiliary storage and dispensing unit for use with a computer-controlled supply and medication dispenser station. The dispensing unit includes a cabinet having a plurality of lockable doors, a device for interconnecting one or more of the doors to allow access to the cabinet and a door unlocking device interconnected to the computer-controlled station for selectively unlocking one or more of the doors as a function of information inputted to the station.
• Computer controlled dispensing systems, such as those discussed above, have been developed in response to a number of problems existing in medical facilities. Computer controlled dispensing systems, for example, address problems such as the removal of medications by unauthorized personnel, dispensing the wrong medication for a patient, inaccurate record keeping, etc.
• The AcuDose-Rx dispensing cabinet available from McKesson Automation Inc. of Pittsburgh, Pa. is an example of a computer controlled cabinet programmed to address the aforementioned problems. A user is required to logon to the computer (thereby identifying who is removing medications). After identifying a patient, the user is presented with a list of medications that have been approved for administering to the identified patient (thereby addressing the problem of incorrect dispensing). Records are kept for each dispensing event thereby creating an audit trail.
• As discussed above, a variety of different storage options are available for dispensing cabinets to ensure the safe and accurate dispensing and administration of medications. These include, but are not limited to, drawers with individual locking pockets which provide access to only one medication in a drawer at any given time; unit-dose dispensing drawers, which provide access to one “unit-of-use” of a medication at any given time, and open matrix drawers, which consist of a plurality of open pockets and which provide access to multiple medications at any given time.
• While such systems provide for access controlled dispensing, most require large amounts of power to keep the compartments locked. Furthermore, systems using lighted indicators require additional power, control circuitry, and wiring. In contrast, systems using non-lighted indicators rely on the drawer or lid to “spring” open. If an item is caught on the drawer or lid, an increased risk is encountered that the item will become airborne when the drawer or lid is opened. The airborne item may become lost or may strike a user.
• Thus, a need exists for a secure unit dose dispensing cabinet that requires less power to operate and provides a mechanical indicator means for notifying the user of correct location of the item to be dispensed without “springing” open a drawer or lid. Additionally, there exists a need for a safer, less error-prone dispensing and replenishment system.
SUMMARY
• One aspect of the present invention relates to an assembly comprising a plurality of bins, a plurality of lids each associated with one of the plurality of bins, wherein each of the bins has a notched tab and a touch latch. The notched tab and the touch latch are in one of an engaged state and a disengaged state when said lid is in a closed position. The assembly includes a lock assembly including a catch operable to prevent the notched tab and the touch latch from changing state and a mechanical indicator responsive to the catch.
• Another aspect of the present invention relates to an automated dispensing cabinet, comprising a plurality of drawers, wherein at least one of the drawers includes a plurality of row assemblies, each of the row assemblies having a plurality of bins. Each of the plurality of bins includes a lid having a tab attached thereto, a touch latch operable to one of engage and disengage the tab when the lid is in a closed position, a lock assembly including a catch operable to prevent the notched tab and the touch latch from one of engaging and disengaging, and a mechanical indicator responsive to the lock assembly and viewable when the lid is in a closed position. The automated dispensing cabinet also includes a control computer operable to lock and unlock the plurality of drawers and to control the position of the catch of each of the bins.
• Additionally, an aspect of the present invention relates to a method for dispensing an item contained in remote dispensing system. The method comprises granting a user access to the remote dispensing system having a plurality of lockable drawers with a plurality of lockable bins, accepting dispensing information from the user, unlocking at least one of the plurality of drawers, wherein the unlocked drawer contains an item to be dispensed, unlocking at least one of the plurality of bins located within the unlocked drawer while changing the state of a mechanical indicator associated with a bin that has been unlocked, verifying that the user has closed the unlocked bin, and locking the at least one of the plurality of bins and the at least one of the plurality of drawers.
• Another aspect of the present invention relates to a method for restocking items contained in a remote dispensing system including a cabinet having with a plurality of drawers, at least one of the plurality of drawers having a plurality of bin row assemblies. The method comprises selecting a bin row assembly, opening the drawer containing the bin row assembly, identifying the selected bin row assembly, removing the selected bin row assembly from the drawer, inserting a restocked bin row assembly in place of the removed selected bin row assembly.
• Yet another aspect of the present invention relates to an assembly comprising a plurality of bins, a plurality of lids, each lid being associated with one of the plurality of bins, each of the bins having a notched tab, a lock assembly including a catch operable to one of engage or disengage the notched tab when the lid is in a closed position, and a mechanical indicator responsive to the catch.
• Those advantages and benefits, and others, will be apparent from the Detailed Description below.
BRIEF DESCRIPTION OF THE DRAWINGS
• To enable the present invention to be easily understood and readily practiced, the present invention will now be described for purposes of illustration and not limitation, in connection with the following figures wherein:
• FIG. 1 is a perspective view of a dispensing system located at a decentralized location according to one embodiment of the present invention.
• FIG. 2 is a perspective view of a lockable drawer for the dispensing system shown inFIG. 1 according to one embodiment of the present invention.
• FIG. 3A is a perspective view of a bin row assembly for the lockable drawer shown inFIG. 2 according to one embodiment of the present invention.
• FIG. 3B is a front view of a the bin row assembly ofFIG. 3A according to an embodiment of the present invention.
• FIGS. 3C and 3D are left and right side views, respectively, of the bin row assembly ofFIG. 3A according to an embodiment of the present invention.
• FIG. 3E is a top view of the bin row assembly ofFIG. 3A according to an embodiment of the present invention.
• FIG. 3F is an exploded view of the bin row assembly ofFIG. 3A according to an embodiment of the present invention.
• FIGS. 3G and 3H illustrate a touch latch in the unhooked and hooked positions, respectively according to one embodiment of the present invention.
• FIG. 4A illustrates a power control circuit board for the bin row assembly ofFIG. 3A according to one embodiment of the present invention.
• FIG. 4B is a detailed view of a portion of the power control board for the bin row assembly illustrated inFIG. 4A according to one embodiment of the present invention.
• FIG. 4C is an exploded view of a portion of the power control board for the bin row assembly ofFIG. 3A according to one embodiment of the present invention.
• FIG. 4D is a sectional view taken along the lines A-A of the portion of the power control board for the bin row assembly illustrated inFIG. 4B.
• FIG. 5 illustrates an operational process for dispensing items from the remote dispensing system shown inFIG. 1 according to an embodiment of the present invention.
• FIG. 6 illustrates an operational process for restocking dispensed items from the remote dispensing system shown inFIG. 1 according to an embodiment of the present invention.
• FIGS. 7A-7C are an electrical schematic of an input/output interface circuit and a manually activated override interface circuit for the remote dispensing system illustrated inFIG. 1 according to an embodiment of the present invention.
• FIGS. 8A and 8B are an electrical schematic of a relay select circuit for the remote dispensing system illustrated inFIG. 1 according to an embodiment of the present invention.
• FIGS. 9A and 9B are an electrical schematic of a manual override sequence control circuit for the remote dispensing system illustrated inFIG. 1 according to an embodiment of the present invention.
• FIG. 10 is an electrical schemata of feedback circuits for the remote dispensing system illustrated inFIG. 1 according to an embodiment of the present invention.
DETAILED DESCRIPTION
• FIG. 1 is a perspective view of aremote dispensing system10 located at a decentralized location according to one embodiment of the present invention. Thesystem10 illustrated inFIG. 1 may be comprised of, for example, an AcuDose-Rx™ cabinet12 (available from McKesson Automation inc., 700 Waterfront Drive, Pittsburgh, Pa.) having acontrol computer14, and an AcuDose-Rx™auxiliary cabinet16. Asupply tower18 is also illustrated. Thecontrol computer14 controls the operation of thecabinet12,auxiliary cabinet16, andsupply tower18.
• Thecontrol computer14 may include a memory device (not shown, such as a disk drive, tape drive, CD-ROM drive, etc.) having a local database. The local database may contain inventory, user, and patient information (among others). Alternatively, thecontrol computer14 may be in communication with another computer (for example, located at the centralized storage location) having a central database which contains the inventory, user, and patient information (among others).
• Thecontrol computer14 accepts entry of inventory, user, patient, and other information via akeyboard20,scanning device22, and datalink (not shown), among others. Thecontrol computer14, in programmed interaction with the entered information, provides output information to adisplay24, printer (not shown), etc. and provides output control signals to thecabinet12,auxiliary cabinet16, andsupply tower18, etc.
• Thecontrol computer14 may be programmed to regulate access to the system'scabinets12,16 andsupply tower18 and to generate records related to access, inventory, etc. The records may be stored in the local database, displayed on thedisplay24, printed by a printer unit, or transmitted to a central database (among others). Thecontrol computer14 may be preprogrammed with appropriate information regarding the medication types associated with, and their exact location within, eachcabinet12,auxiliary cabinet16 andsupply tower18. The programming may, for example, be entered directly into thecontrol computer14 or downloaded from the central database.
• As will be discussed in greater detail in conjunction withFIGS. 5 and 6, a user logs onto thecontrol computer14 to perform a dispensing operation. After log-on, patient information and information regarding items to be dispensed are entered. Based on the entered information, theappropriate drawers26 in thecabinet12 and theauxiliary cabinet16, andvarious doors28 on thesupply tower18 are unlocked. The user then accesses theunlocked drawers26 anddoors28 and removes the appropriate item. After the item to be dispensed has been removed, its removal is recorded at thecontrol computer14. The record may be entered manually by the user or automatically by a feedback signal. The user may continue to dispense items for the identified patient, enter patient information for another patient, or logoff.
• Entry of information, including log-in, can be performed in a variety of ways with a variety of input devices, for example, using thekeyboard20 andbarcode scanning22. Additional input devices or input means, for example, a touch screen, selecting items from a pick list, RF ID), flash memory, magnetic strips, OCR (none of which are shown), etc., may also be used. The reader will understand that the hardware illustrated inFIG. 1 is exemplary and is illustrated for purposes of demonstrating one type of hardware which may be located at the decentralized location.
• The hardware illustrated inFIG. 1 limits access to the items to be dispensed to those individuals who have properly logged on. Thus, the hardware illustrated inFIG. 1 is referred to as a closed system for performing dispensing operations because a dispensing operation cannot be performed unless the user is identified to, and recognized by, thecontrol computer14.
• It should be noted that in the current embodiment, a limited access manual override system is also provided. Access is limited to individuals having keys to the rear of the AcuDose-Rx cabinet12, AcuDose-Rxauxiliary cabinet16, and AcuDose-Rx supply tower18.
• FIG. 2 is a perspective view of one type of alockable drawer26 for use with the dispensingsystem10 shown inFIG. 1 according to one embodiment of the present invention. For example, thelockable drawer26 may be one of thedrawers26 from the AcuDose-RxTM cabinet12 or from theauxiliary cabinet16.Lockable drawer26 is comprised of ahousing30, aframe31, and a pair of slides32 (one of which is seen inFIG. 2) which enable theframe31 to move relative to thehousing30. As illustrated inFIG. 2, five (5)bin row assemblies34, each having five (5)bins36 are secured to theframe31. Theframe31 andbin row assemblies34 are slidably moveable between a closed position within thehousing30 and an open position outside of thehousing30. It should be noted that thehousing30 may have a single frame31 (with a plurality ofbin row assemblies34 secured thereto, for example, as shown inFIG. 2) or with a number of frames31 (each having a singlebin row assembly34 secured thereto, for example) each mounted on corresponding slides31.
• For simplicity, in the current embodiment thebins36 are numbered from left-to-right and from back-to-front, relative to thelockable drawer26. Thus as illustrated, the firstbin row assembly34 is comprised of bins1-5, the secondbin row assembly34 is comprised of bins6-10, the thirdbin row assembly34 is comprised of bins11-15, etc. It should be noted that the number ofbin row assemblies34 perdrawer26, the number ofbins36 perbin row assembly34, and the scheme used to number thebin row assemblies34 andbins36 may be altered while remaining within the scope of the present invention.
• Thebin row assemblies34, to facilitate restocking procedures or changing of inventory, are separable from theopen drawer26. For example if the bins6-10 need to be restocked, the second bin row assembly may be removed from theopen drawer26, taken to the central storage location, restocked, and then returned to theopen drawer26, or swapped out with another bin row assembly, i.e., the second bin row assembly may be removed from theopen drawer26 and a previously stocked replacementbin row assembly34 may be substituted in place of the second bin row assembly.
• FIGS. 3A-3F are perspective, front, left side, right side, top, and exploded views, respectively, of abin row assembly34 for the dispensingsystem10 shown inFIG. 1 according to one embodiment of the present invention. As best seen inFIG. 3E, thebin row assembly34 is comprised of abase38,front wall40,back wall42,side wall44, andinterior partitions46. As illustrated, thebin row assembly34 in the current embodiment contains five (5)bins36. Thefront wall40 includes alip48 and one ormore spacers50 configured to receive a powercontrol circuit board52. The powercontrol circuit board52 is positioned under thelip48, abutting thespacers50, and attached to the front wall40 (for example, with screws). Thelip48 includes a slottedindicator window54 and alatching mechanism aperture56 for each bin36.
• Alid58 is attached to theback wall42 of each bin36 via ahinge mechanism60. When thelid58 is in the closed position, a notchedtab62 on thelid58 enters theaperture56 in thelip48 and engages with atouch latch63 that is mounted to the bin36 (for example, on thelip48 under theaperture56, among others). Thetouch latch63, as is known in the art, operates by pushing the notchedtab62 on thelid58 into thetouch latch63. The notchedtab62 “hooks” with thetouch latch63. Referring briefly toFIG. 3H, a touch latch is illustrated in the hooked position. Thus, thelid58 is closed it by pushing it down until thetouch latch63 latches and holds it closed. Thelid58 is opened by pushing down on thelid58 again which causes thetouch latch63 to release (i.e., “unhook”) thelid58. Referring briefly toFIG. 3G, a touch latch is illustrated in the unhooked position.
• When closed, thelid58 may be locked in place by a lock assembly66 (shown inFIGS. 4A-4C) contained on the powercontrol circuit board52. In the current embodiment, each bin36 has alid58 associated therewith. Additionally, eachlid58 may be constructed of a transparent material so that both the contents of thebin36 and the slottedindicator window54 can be viewed when thelid58 is in the closed position.
• When alid58 is in the closed position (i.e., engaged by the touch latch63) and locked by thelock assembly66, the slottedindicator window54 displays a first color (for example, red) indicating to the user that thelid58 cannot be opened. When thelid58 is unlocked by thelock assembly66, the slottedindicator window54 displays another color (for example, green) indicating to the user that thelid58 can be opened. It should be noted that in the current embodiment, the indicator can be viewed even when thelid58 remains closed. It should further be noted that other types of mechanical indicators may be used that permit the indicator to be viewed when thelid58 is closed while remaining within the scope of the present invention.
• It should be noted that an assembly having an alternative latching/locking means may be used while remaining within the scope of the present invention. For example, alid58 may have a notchedtab62 that is engaged by thelock assembly66 without using atouch latch63. In one instance, the lock assembly'scatch74 may engage the notchedtab62 when the lid is in a closed position.
• It should further be noted that, although thebin row assembly34 of the current embodiment has five (5) bins, the number ofbins36 may be varied while remaining with the scope of the present invention. Additionally,certain bins36 may not have alid58 associated therewith, for example, abin36 containing non-regulated supplies may not have alid58.
• FIG. 4A illustrates a powercontrol circuit board52 for thebin row assembly34 ofFIG. 3A according to one embodiment of the present invention.FIGS. 4B-4D are detailed, exploded, and sectional views of a portion of the powercontrol circuit board52 for thebin row assembly34 illustrated inFIG. 4A according to one embodiment of the present invention.
• Referring toFIG. 4A, powercontrol circuit board52 is comprised of abacking plate64 with five (5) latch assemblies66 (i.e., one associated with each bin36) and aconnector68 attached thereto. Theconnector68 is used to connect signal and power conductors for eachlock assembly66 to thesystem10. For example, theconnector68 couples with a complimentary connector (not shown) that is in electrical communication with thecontrol computer14. The complimentary connector in the present embodiment is located on thedrawer26.
• As best seen inFIG. 4C, in the current embodiment each lockingassembly66 includes asolenoid70,pivot arm72,catch74. Thecatch74, in the current embodiment, includes the mechanical indicator for notifying the user whether thebin36 is locked or unlocked. Thelock assembly66 may also include arelay82, Hall-effect sensor84, as well as associated hardware, for example,flat washers76,fastener standoff78, and screws80, among others.
• In the current embodiment, latchingsolenoids70 are used. A latchingsolenoid70 refers to asolenoid70 that does not have a default mechanical state and must receive an electrical pulse to change states. For, example in the current embodiment, thecatch74 slides from side to side to lock and unlock thelid58. When thecatch74 is engaged (i.e., thelid58 is locked), the notchedtab62 of thelid58 is prevented from being pushed down far enough to change the state of (i.e., engage or disengage) the touch latch. If power is removed from the latchingsolenoid70, thecatch74 remains engaged. Thecatch74 remains engaged until a control pulse is applied to the latchingsolenoid70. Likewise, when abin36 is unlocked, thecatch74 is disengaged. If power is removed from the latchingsolenoid70, thecatch74 remains disengaged. Thecatch74 remains disengaged until a control pulse is applied to the latchingsolenoid70. Thus, the use of latchingsolenoids70 reduces the amount of power needed to operate thedispensing system10. It should be noted that other means for moving the catch74 (for example, a non-latching solenoid, a motor, a pneumatic or hydraulic cylinder, an actuator, an electromagnet, etc.) may be used while remaining within the scope of the present invention.
• Referring now toFIG. 4B, thelock assembly66 is shown in the locked (i.e., engaged) position. For simplicity, the notchedtab62 andtouch latch63 are not shown inFIG. 4B. When an electrical pulse is applied via therelay82 to thesolenoid70, thesolenoid plunger71 extends (moves to the left as shown), causing thepivot arm72 to rotate clockwise about its pivot point. Thepivot arm72, in turn, causes thecatch74 to unlock (i.e., move to the right as shown) thelid58. When thelock assembly66 is in the disengaged position and an electrical pulse with opposite polarity is applied to thesolenoid70 via therelay82, thesolenoid plunger71 retracts (moves to the right as shown), causing thepivot arm72 to rotate counterclockwise about its pivot point. Thepivot arm72, in turn, causes thecatch74 to unlock (i.e., move to the left as shown) thelid58. The Hall-effect sensor84 produces a feedback signal (that is sent to the control computer14) indicative of whether thelid58 is closed or open.
• As discussed above, when thelock assembly66 is engaged, the notchedtab62 of thelid58 is prevented from being pushed down far enough to change the state of (i.e., engage or disengage) thetouch latch63. Thus, it should be apparent to one skilled in the art that the direction of travel of thecatch74 to lock and unlock the lid may be changed while remaining within the scope of the present invention.
• In the current embodiment, the locking/unlocking and the mechanical indication of the bin's status (i.e., locked or unlocked) are combined in a unitary function, i.e., as the bin is locked or unlocked, the mechanical indicator changes state. Thecatch74, for example, may have an indicia (such as colors, words, symbols, marks, etc.) representative of whether the catch is engaged (i.e., thebin36 is locked) or disengaged (i.e., thebin36 is unlocked). For example as discussed in conjunction withFIGS. 3A-3F, catch74 may have red colored portions and green colored portions which show through theindicator window54 when the bin in locked and unlocked, respectively. It should be noted, however, that other mechanical indicia, such as raising a flag or pin, rotating a cylinder having “locked” on one portion and “unlocked” on another portion, turning a dial, etc. may be used while remaining within the scope of the present invention. Also, the function need not be unitary, that is, the bin may be locked or unlocked followed by the mechanical indicator changing state. It should be apparent to one skilled in the art that any mechanical indicator that is responsive to thelock assembly66 may be used while remaining within the scope of the present invention.
• FIG. 5 illustrates anoperational process500 for dispensing items at aremote dispensing system10 according to an embodiment of the present invention.Operation500 is initialized by a user logging onto the remote dispensing system'scontrol computer14 atoperation501. In the current embodiment, theremote dispensing system10 includes acontrol computer14, AcuDose-Rx cabinet12, AcuDose-Rxauxiliary cabinet16, and asupply tower16 as discussed in conjunction withFIG. 1.
• After logging onto thecontrol computer14, the user is granted access to theremote dispensing system10 inoperation502. In the current embodiment, the access may be either restricted or unrestricted. Restricted access allows the user to access fewer than all of thedrawers26 andbins36 located at the remote dispensingstation10 and prevents the user from removing some or all of thebin row assemblies34 from adrawer26. On the contrary, unrestricted access allows the user access to all of thedrawers26 andbins34 located at the remote dispensingstation10 and allows the user to removing all of thebin row assemblies34 from adrawer26.
• Thecontrol computer14 then accepts dispensing information from said user inoperation503. In the current embodiment, dispensing information may include inventory, user, patient, and prescription information, among others. The dispensing information may be entered via akeyboard20,scanning device22, and datalink (not shown), among others.
• After accepting the dispensing information, thedrawers26 containing the items to be dispensed are unlocked inoperation504. In the current embodiment, thecontrol computer14, in programmed interaction with the entered information, provides the output control signals for unlocking thedrawers26 of thecabinet12,auxiliary cabinet16, andsupply tower18.
• Thebins36 within theunlocked drawers26, which contain the items to be dispensed, are unlocked inoperation505. In the current embodiment, thebins36 contain a mechanism that not only locks/unlocks thebin36, but also simultaneously indicates to the user whether thebin36 is locked or unlocked. In the current embodiment, a mechanical indicator is used which can be viewed when the bin'slid58 is closed. It should be noted that even when unlocked, the bin'slid58 remains closed until lifted by the user, or the lid can be spring loaded so the pushing down on an unlocked lid causes the lid to spring up.
• Once the bin(s)36 have been unlocked, the user can remove the desired item and close thebin lid58. Typically, the user then enters information intocomputer14 to create a dispensing record. In the current embodiment, feedback signals are sent from thebins36 to the control computer. The feedback signals may be used, among others, to verify whether adrawer26,bin36, etc. is locked or unlocked, and whether a bin'slid58 is opened or closed.
• After the remote dispensingstation10 verifies that the user has closed the unlocked bin(s)36 and closed thedrawer26 inoperation506, theclosed bins36 and closeddrawer26 are locked inoperation507. As discussed above, the mechanism used not only locks/unlocks thebin36, but also simultaneously indicates to the user whether thebin36 is locked or unlocked. A mechanical indicator is used which can be viewed when the bin'slid58 is closed.
• After the openedbins36 anddrawers26 are locked inoperation507, the user indicates whether another dispense is desired inoperation508. If another dispense is desired,operational process600 returns tooperation603 and the user enters new dispensing information. If another dispensing operation is not desired, the user is logged off of thecontrol computer14 inoperation509.
• FIG. 6 illustrates anoperational process600 for restocking dispensed items with theremote dispensing system10 according to an embodiment of the present invention.Operation600 is initiated byoperation601 when theremote dispensing system10 detects that abin row assembly34 within theremote system10 is depleted or below par (i.e., below an acceptable inventory level). In the current embodiment, thecontrol computer14 may be manually notified by a user, notified by a centralized computer, or thecontrol computer14 may automatically detect, that abin row assembly34 has been selected (i.e., it is depleted or below par).
• Theremote dispensing system10 then unlocks thedrawer26 containing the selectedbin row assembly34 inoperation602. In the current embodiment, the user is notified of whichdrawer26 has been unlocked on thecontrol computer display14. Alternatively, an indicator located on the cabinet or auxiliary cabinet may also be used to notify the user.
• The selectedbin row assembly34, within theunlocked drawer26, is then identified inoperation603. In the current embodiment, the selectedbin row assembly34 is identified on thecontrol computer display24. Alternatively, an indicator located on the drawer, cabinet, or auxiliary cabinet may also be used to identify the selectedbin row assembly34.
• After the selectedbin row assembly34 has been identified, the user removes the selectedbin row assembly34 from thedrawer26 inoperation604. In one embodiment, thebin row assembly34 can be secured within thedrawer26 such that a user having restricted access (as discussed in conjunction withFIG. 5) can only remove the selectedbin row assembly34 from thedrawer26 that has been unsecured by thecontrol computer14. The user having restricted access is unable to remove the bin row assemblies that remain secured.
• A restockedbin row assembly34 is then inserted into thedrawer26 inoperation605. In the current embodiment, the restockedbin row assembly34 is filled at a centralized storage location. Each bin in the restockedbin row assembly34 is locked at the centralized storage location, prior to transporting the restockedbin row assembly34 to theremote dispensing system10. After the restockedbin row assembly34 is inserted into theunlocked drawer26 and thedrawer26 is closed, thecontrol computer14 locks thedrawer26 inoperation606.Operational process600 is then terminated inoperation607.
• FIGS. 7A-7C are an electrical schematic of an input/output interface circuit86 and a manualoverride interface circuit94 for theremote dispensing system10 illustrated inFIG. 1 according to an embodiment of the present invention. The input/output interface circuit includesfilters87, flip-flops88,inverters89, and buffers90, among others. Column select and row select input bits onpins91, sent fromcontrol computer14, are received by the inputoutput interface circuit86, inverted, buffered and output to a relay select circuit92 (discussed in conjunction withFIG. 8) via row select and column select pins93.FIG. 7 also illustrates a manualoverride interface circuit94, which in conjunction with a flip-flop88A, may be used to disable the row and columnselect inputs91 should a manual override be instituted.FIG. 7 also illustrates a start transaction bit carried online102 which is input to apower drive104 through a one-shot106. Finally, a flip-flop88 is used to generate signals for determining the direction needed to drive thesolenoids70. It should be noted that alternative input/output interface and manual override interface circuits may be used while remaining within the scope of the present invention.
• FIG. 8 is an electrical schematic of a relayselect circuit92 for theremote dispensing system10 illustrated inFIG. 1 according to an embodiment of the present invention. In the current embodiment, the relayselect circuit92 has a rowselect circuit108 and a columnselect circuit110 that receive signals from the row select and column select pins93 of the input/output interface circuit86. The rowselect circuit108 and columnselect circuit110 each fire one of a plurality of output lines that feed a grid or matrix ofrelay circuits95. In the current embodiment, each bin36 in the remote dispensingstation10 has acorresponding relay circuit95. If a givenrelay circuit95 receives both a row select signal (e.g., “X”) and a column select signal (e.g., “Y”), the relay for that “X-Y” coordinate is selected. The output of therelay circuit95 is used to pulse the latching mechanism's66 latchingsolenoid70 for the desiredbin36, thus locking or unlocking thebin36. It should be noted that an alternative relay select circuits or other circuits may be used to actuate thelatching mechanism66 for locking and unlocking thebins36 while remaining within the scope of the present invention.
• FIG. 9 is an electrical schematic of a manual overridesequence control circuit96 for theremote dispensing system10 illustrated inFIG. 1 according to an embodiment of the present invention. The circuit ofFIG. 9 is comprised of a pair of counters that enable eachbin36 of a selecteddrawer26 to be separately and sequentially addressed and unlocked, before proceeding to the next drawer and separately and sequentially addressing and unlocking all of thebins36 in thatdrawer26. In this manner, the power requirements are maintained at an acceptable level. A similar scheme could be implemented with thecontrol computer14 if it is still functioning and an override is needed for some reasons other than acontrol computer14 malfunction. It should be noted that the actual sequence employed, as well as the auto-sequence circuit used for the manual override (among others) may be varied while remaining within the scope of the present invention.
• FIG. 10 is an electrical schematic of a portion of a feedback circuit for theremote dispensing system10 illustrated inFIG. 1 according to an embodiment of the present invention. As discussed, thelatching mechanism66 for each bin36 produces one or more feedback signals. For example, a feedback signal may indicate that thelid58 is opened or closed (e.g., designated as 0/C inFIG. 10). In the current embodiment, the feedback signal for thebins36 in each column (i.e., within a drawer26) are sent to afeedback selector114. It should be noted that only onefeedback selector114 is shown inFIG. 10 for simplicity. Although not shown inFIG. 10, the feedback circuit includes a number offeedback selectors114 to receive feedback from eachbin36. The output of thefeedback selectors114 are then sent to the control computer14 (e.g., viapin PORT3 BIT0). It should be noted that other feedback circuits may be used while remaining within the scope of the present invention.
• It should be recognized that the above-described embodiments of the invention are intended to be illustrative only. Numerous alternative embodiments may be devised by those skilled in the art without departing from the scope of the following claims.

Claims (3)

1. A method for restocking items contained in a remote dispensing system including a cabinet having with a plurality of drawers, at least one of said plurality of drawers having a plurality of bin row assemblies, said method comprising:

selecting a bin row assembly;

opening said drawer containing said bin row assembly;

identifying said selected bin row assembly;

removing said selected bin row assembly from said drawer;

inserting a restocked bin row assembly in place of said removed selected bin row assembly.

2. The method ofclaim 1 further comprising:

loading said items into a plurality of bins contained in said restocked bin row assembly at a centralized storage area;

locking said plurality of bins; and

transporting said restocked bin row assembly to said remote dispensing system.

3. The method ofclaim 1 further comprising updating the inventory of said remote dispensing system.

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