# US 9,039,876 B2 · Test strip ejector for medical device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,039,876 B2 - Document ID: US9039876B2 - Status: Granted - Kind: B2 - Application number: 13/673,422 - Filed: 2012-11-09 - Published: 2014-01-02 - Granted: 2015-05-26 - Earliest claimed: 2012-06-29 - Assignees: Roche Diagnostics Operations, Inc. - Applicants: Roche Diagnostics Operations, Inc. - Inventors: Clint A. Ecoff; Bryan Rolfs; Anthony J. Uberta, III - Web page: https://patentgrep.com/patent/US9039876B2 ## CPC - G01N 27/3273: {Devices therefor, e.g. test element readers, circuitry (details not specific to biochemical electrodes G01N33/4875)} - A61B 90/00: Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges - G01N 33/4875: {Details of handling test elements, e.g. dispensing or storage, not specific to a particular test method (test-elements per se B01L, automatic analysers G01N35/00, in-vivo analysis on the human body for medical diagnosis A61B)} - G01N: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES (measuring or testing apparatus or processes other than immunoassay, involving enzymes or microorganisms C12M, C12Q) - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) ## Abstract A test strip ejector system for receiving and ejecting a fluid testing medical device test strip includes a mechanism assembly supported by the device whereby user actuation of the mechanism assembly induces displacement of the test strip in at least a test strip ejection direction to eject the test strip. The mechanism assembly includes a power source and an electric motor such as a piezo-electric linear micro motor connected to the power source. The electric motor has an armature displaced when the electric motor is energized. A digital display/user interface is provided. Selection of an ejection function presented on the digital display/user interface initiates operation of the electric motor and displacement of the armature thereby displacing the test strip in the ejection direction. An operating system including a microprocessor is connected to the display/user interface. The microprocessor controls direction of operation and operating speed of the motor. ## Claims ### Claim 1 A test strip ejector system for receiving and ejecting a test strip of a fluid testing medical device, the system comprising: a mechanism assembly supported by the fluid testing medical device whereby user actuation of the mechanism assembly induces displacement of the test strip in at least a test strip ejection direction to eject the test strip, the mechanism assembly including: a power source; and an electric motor connected to the power source, the electric motor having an armature displaced when the electric motor is energized; and a digital display/user interface, selection of an ejection function presented on the digital display/user interface acting to initiate operation of the electric motor and displacement of the armature thereby displacing the test strip in the ejection direction. ### Claim 2 (depends on 1) The test strip ejector system for receiving and ejecting a test strip of a fluid testing medical device of claim 1, wherein the test strip is positioned in direct contact with the armature in a test strip test position. ### Claim 3 (depends on 2) The test strip ejector system for receiving and ejecting a test strip of a fluid testing medical device of claim 2, further including a motor housing having the motor positioned therein and an armature cavity, wherein the armature is initially positioned in an extended position such that manual displacement of the test strip in a loading direction acts to inwardly displace the armature to the test strip test position. ### Claim 4 (depends on 3) The test strip ejector system for receiving and ejecting a test strip of a fluid testing medical device of claim 3, wherein the mechanism assembly further includes a magnet positioned proximate to the armature cavity acting to magnetically retract the armature into the armature cavity when the motor is de-energized. ### Claim 5 (depends on 2) The test strip ejector system for receiving and ejecting a test strip of a fluid testing medical device of claim 2, further including a motor housing having the motor positioned therein and an armature cavity, wherein the armature is initially positioned in a retracted position within the armature cavity such that manual displacement of the test strip in a loading direction acts to position the test strip in direct contact with the armature defining the test strip test position. ### Claim 6 (depends on 1) The test strip ejector system for receiving and ejecting a test strip of a fluid testing medical device of claim 1, further including an operating system including a microprocessor connected to the display/user interface, the microprocessor acting to control direction of operation and operating speed of the motor. ### Claim 7 (depends on 6) The test strip ejector system for receiving and ejecting a test strip of a fluid testing medical device of claim 6, wherein the operating system further includes an accelerometer having an output connected to the microprocessor. ### Claim 8 (depends on 7) The test strip ejector system for receiving and ejecting a test strip of a fluid testing medical device of claim 7, wherein the accelerometer is active only after the test phase is complete or when a test error occurs and the test strip is to be ejected, when the accelerometer is active a vertical orientation of the analysis device is sensed by the accelerometer creating an accelerometer signal acting to initiate ejection of the test strip. ### Claim 9 (depends on 7) The test strip ejector system for receiving and ejecting a test strip of a fluid testing medical device of claim 7, wherein the accelerometer is active only after the test phase is complete or when a test error occurs and the test strip is to be ejected, thereafter if the analysis device is held in a vertical orientation during test result viewing, a vertical to horizontal and return to vertical orientation change to the analysis device is sensed by the accelerometer and a signal generated by the accelerometer acts to initiate ejection of the test strip. ### Claim 10 (depends on 7) The test strip ejector system for receiving and ejecting a test strip of a fluid testing medical device of claim 7, wherein a deliberate shaking motion of the analysis device after the test phase is complete is sensed by the accelerometer creating a signal generated by the accelerometer acting to initiate ejection of the test strip. ### Claim 11 (depends on 6) The test strip ejector system for receiving and ejecting a test strip of a fluid testing medical device of claim 6, wherein the operating system further includes a driver circuit connecting the microprocessor to the motor. ### Claim 12 (depends on 1) The test strip ejector system for receiving and ejecting a test strip of a fluid testing medical device of claim 1, further including a digital ejection button presented on the digital display/user interface, selection of the ejection button acting to initiate operation of the electric motor and displacement of the armature thereby displacing the test strip in the ejection direction. ### Claim 13 (depends on 12) The test strip ejector system for receiving and ejecting a test strip of a fluid testing medical device of claim 12, wherein displacement of the ejection button in a sliding direction acts to displace the test strip in the ejection direction. ### Claim 14 (depends on 12) The test strip ejector system for receiving and ejecting a test strip of a fluid testing medical device of claim 12, wherein a velocity of displacement of the ejection button is directly related to a velocity of ejection of the test strip. ### Claim 15 (depends on 12) The test strip ejector system for receiving and ejecting a test strip of a fluid testing medical device of claim 12, further including a reverse operation of the motor, wherein when the ejection button is released reverse operation of the motor inwardly retracts the armature into a housing of the fluid testing medical device. ### Claim 16 (depends on 1) The test strip ejector system for receiving and ejecting a test strip of a fluid testing medical device of claim 1, wherein the motor is a piezo-electric linear micro motor operating when energized to both rotate and axially displace the armature. ### Claim 17 (depends on 1) The test strip ejector system for receiving and ejecting a test strip of a fluid testing medical device of claim 1, wherein the motor is oppositely operable in each of the ejection direction and a test strip loading direction allowing powered full retraction of the armature to the test strip test position and prior to operation of the motor for test strip ejection. ### Claim 18 (depends on 1) The test strip ejector system for receiving and ejecting a test strip of a fluid testing medical device of claim 1, wherein the digital display/user interface provides for a plurality of user selected operating screens, wherein a force increase and a force decrease button are provided on a selected one of the operating screens, selection of one of the force increase or force decrease buttons acting to increase or decrease a force applied by the motor to increase or decrease a velocity of the test strip during ejection. ### Claim 19 A test strip ejector system for receiving and ejecting a test strip of a fluid testing medical device, the system comprising: a mechanism assembly supported by the fluid testing medical device whereby user actuation of the mechanism assembly induces displacement of the test strip in at least a test strip ejection direction to eject the test strip, the mechanism assembly including: a power source; and an electric motor connected to the power source, the electric motor having an armature displaced when the electric motor is energized; a digital display/user interface, selection of an ejection function presented on the digital display/user interface acting to initiate operation of the electric motor and displacement of the armature thereby displacing the test strip in the ejection direction; and an operating system including a microprocessor connected to the display/user interface, the microprocessor acting to control direction of operation and operating speed of the motor. ### Claim 20 (depends on 19) The test strip ejector system for receiving and ejecting a test strip of a fluid testing medical device of claim 19, further including a digital ejection button presented on the digital display/user interface, selection of the ejection button acting to initiate operation of the electric motor and displacement of the armature thereby displacing the test strip in the ejection direction. ### Claim 21 (depends on 20) The test strip ejector system for receiving and ejecting a test strip of a fluid testing medical device of claim 20, wherein the ejection button is displaceable in a sliding direction which is parallel with the ejection direction to initiate test strip ejection. ### Claim 22 (depends on 21) The test strip ejector system for receiving and ejecting a test strip of a fluid testing medical device of claim 21, wherein a velocity imparted to the ejection button by a user directly determines a discharge velocity of the test strip. ### Claim 23 (depends on 19) The test strip ejector system for receiving and ejecting a test strip of a fluid testing medical device of claim 19, wherein the operating system further includes an accelerometer having an output connected to the microprocessor, the accelerometer acting to automatically initiate ejection of the test strip by a change in orientation of the fluid testing medical device. ### Claim 24 (depends on 19) The test strip ejector system for receiving and ejecting a test strip of a fluid testing medical device of claim 19, further including a switch connected between the power source and the motor, the switch actuated by selection of the ejection function. ### Claim 25 (depends on 19) The test strip ejector system for receiving and ejecting a test strip of a fluid testing medical device of claim 19, wherein the display/user interface includes set force screen having a save button acting when selected to save a selected motor operating force in a memory of the analysis device. ### Claim 26 (depends on 19) The test strip ejector system for receiving and ejecting a test strip of a fluid testing medical device of claim 19, wherein the mechanism assembly is normally positioned in a test strip test position having the armature retracted in a motor housing containing the motor. ### Claim 27 (depends on 19) The test strip ejector system for receiving and ejecting a test strip of a fluid testing medical device of claim 19, wherein the test strip is manually loaded in a loading direction in a loading operation and the loading operation does not displace any members of the mechanism assembly. ### Claim 28 (depends on 19) The test strip ejector system for receiving and ejecting a test strip of a fluid testing medical device of claim 19, wherein the ejection button is slidably displaced on the digital display/user interface in a sliding direction to directly eject the test strip. ### Claim 29 A test strip ejector system for receiving and ejecting a test strip of a fluid testing medical device, the system comprising: a mechanism assembly supported by the fluid testing medical device whereby user actuation of the mechanism assembly induces displacement of a test strip slidably received in the fluid testing medical device in at least a test strip ejection direction to eject the test strip, the mechanism assembly including: a power source; and an electric motor connected to the power source, the electric motor acting to displace a piston which is in contact with the test strip when the electric motor is energized; an operating system including: a microprocessor connected to the power source and the motor, the microprocessor acting to control direction of operation and operating speed of the motor; and an accelerometer acting when an orientation of the fluid testing medical device is changed to initiate operation of the motor. ### Claim 30 (depends on 29) The test strip ejector system for receiving and ejecting a test strip of a fluid testing medical device of claim 29, further including a digital display/user interface providing a test result readout. ### Claim 31 (depends on 30) The test strip ejector system for receiving and ejecting a test strip of a fluid testing medical device of claim 30, wherein the digital display/user interface provides for a plurality of user selected operating screens, wherein a force increase and a force decrease button are provided on a selected one of the operating screens, selection of one of the force increase or force decrease buttons acting to increase or decrease a force applied by the motor to increase or decrease a velocity of the test strip during ejection. ### Claim 32 (depends on 30) The test strip ejector system for receiving and ejecting a test strip of a fluid testing medical device of claim 30, further including a switch connected between the power source and the motor, the switch actuated by selection of the ejection function visibly presented on the digital display/user interface. ### Claim 33 A test strip ejector system for receiving and ejecting a test strip of a fluid testing medical device, the system comprising: a test strip slidably received in a receiving slot of the fluid testing medical device in a test strip loading direction; a mechanism assembly supported by the fluid testing medical device whereby user actuation of the mechanism assembly induces displacement of the test strip in a test strip ejection direction opposite to the loading direction to eject the test strip, the mechanism assembly including: a power source; and an electric motor connected to the power source, the electric motor having an armature displaced when the electric motor is energized; and a digital display/user interface, selection of an ejection function presented on the digital display/user interface acting to initiate operation of the electric motor and displacement of the armature thereby displacing the test strip in the ejection direction. ### Claim 34 (depends on 33) The test strip ejector system for receiving and ejecting a test strip of a fluid testing medical device of claim 33, wherein the digital display/user interface includes an eject test strip button acting when manually selected to initiate operation of the electric motor. ### Claim 35 (depends on 33) The test strip ejector system for receiving and ejecting a test strip of a fluid testing medical device of claim 33, wherein an ejection force acting to eject the test strip is selected by the user using a set force button provided on the digital display/user interface. ### Claim 36 A glucose test meter having a test strip ejector system for receiving and ejecting a test strip, the test meter comprising: a meter body having a receiving slot; a test strip slidably received in the receiving slot of the meter body in a test strip loading direction; and a mechanism assembly supported by the meter body whereby user actuation of the mechanism assembly induces displacement of the test strip in a test strip ejection direction opposite to the loading direction to eject the test strip, the mechanism assembly including: a power source; and an electric motor connected to the power source, the electric motor having an armature displaced when the electric motor is energized. ### Claim 37 (depends on 36) The glucose test meter having a test strip ejector system for receiving and ejecting a test strip of claim 36, a digital display/user interface, selection of an ejection function presented on the digital display/user interface acting to initiate operation of the electric motor and displacement of the armature thereby displacing the test strip in the ejection direction. ### Claim 38 (depends on 36) The glucose test meter having a test strip ejector system for receiving and ejecting a test strip of claim 36, wherein the test strip is manually inserted to a test position defining direct contact between the test strip and the armature, and maintained in direct contact with the armature during motion in the ejection direction. ### Claim 39 A method for receiving and ejecting a test strip by a mechanism assembly of a fluid testing medical device, the mechanism assembly including a power source, an electric motor having an armature, a digital display/user interface and an operating system, the method comprising: supporting the mechanism assembly by the fluid testing medical device; connecting the electric motor to the power source; manually inserting a test strip into the fluid testing medical device; and selecting an ejection function presented on the digital display/user interface to initiate operation of the electric motor and displacement of the armature thereby displacing the test strip in an ejection direction. ### Claim 40 (depends on 39) The method of claim 39, further including connecting a microprocessor of the operating system to the display/user interface and to the electric motor. ### Claim 41 (depends on 40) The method of claim 40, further including automatically controlling a direction of operation and operating speed of the motor using the microprocessor. ### Claim 42 (depends on 39) The method of claim 39, further including manually selecting an ejection button presented on the digital display/user interface during the selecting operation. ### Claim 43 (depends on 42) The method of claim 42, further including manually sliding the ejection button across the digital display/user interface during the selecting operation to increase an ejection speed of the test strip.