# US 2010/0168677 A1 · Injection device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2010/0168677 A1 - Document ID: US20100168677A1 - Status: Published application - Kind: A1 - Application number: 12/601,743 - Filed: 2007-11-05 - Published: 2010-07-01 - Earliest claimed: 2007-05-25 - Assignees: Haselmeier AG - Inventors: Jochen Gabriel; Joachim Keitel - Web page: https://patentgrep.com/patent/US20100168677A1 ## CPC - A61M 5/31551: {including axial movement of dose setting member} - A61M 5/31585: {the component being manually operated or triggered by an axially moving actuator operated by user, e.g. an axially movable injection button} - A61M 5/24: Ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or cartridges, e.g. automatic - A61M 5/31515: {Connection of piston with piston rod} - A61M 5/31543: {piston rod reset means, i.e. means for causing or facilitating retraction of piston rod to its starting position during cartridge change} - A61M 5/31575: {using scaling up or down transmissions, e.g. gearbox} - A61M 5/31593: {Multi-dose, i.e. individually set dose repeatedly administered from the same medicament reservoir} - A61M 2005/2407: {from the rear} - A61M 2005/2488: {via rotation, e.g. threads or bayonet} - A61M 2205/581: by audible feedback - A61M 2205/583: by visual feedback - A61M: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals A61D7/00; means for inserting tampons A61F13/26; devices for administering food or medicines orally A61J; containers for collecting, storing or administering blood or medical fluids A61J1/05); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery A61B; chemical aspects of surgical articles A61L); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents A61N1/36021)} ## Abstract An injection device (30) features a housing (42, 52) for reception of a container (34) having a fluid (32) to be injected, a first element (94) for ejecting injection fluid (32) from such a container (34), and said first element (94) has an external thread (92). A metering element (66, 88) has an internal thread (90) that is in engagement with the external thread (92) of the first element (94), and said metering element (66) is rotatable, together with the first element (94), for preselection of a desired injection dose. A coupling arrangement (K1) serves, during an injection operation, to create a nonrotatable connection between the first element (94) and the housing (42, 52) and thereby to block, during an injection operation, a rotation of the first element (94) relative to the housing (42, 52) but to enable a rotation of the metering element (66, 88) relative to the housing (42, 52). ## Claims ### Claim 1 An injection device comprising: a housing (42, 52) to which a container (34) having injection fluid (32) is connectable; a first element (94) for ejecting injection fluid (32) from such a container (34), which first element (94) is shaped with an external thread (92); a metering element (66, 88; 166) that is arranged rotatably relative to the housing (42, 52) and has an internal thread (90) that is in engagement with the external thread (92) of the first element (94), which metering element (66, 88; 166) is rotatable, together with the first element (94), relative to the housing (42, 52) for preselection of an injection dose; and a coupling arrangement (K1) which is implemented to block, during an injection operation, a rotation of the first element (94) relative to the housing (52) but to enable a rotation of the metering element (66, 88; 166) relative to the housing (42, 52), so that, by means of such a rotation of the metering element (66, 88; 166) during an injection operation, an axial displacement of the first element (94) in a proximal direction, i.e. toward the patient, is enabled, in order to eject injection fluid (32) from such a container (34). ### Claim 2 (depends on 1) The injection device according to claim 1, in which, during the preselection of an injection dose, the metering element (66, 88; 166) and the first element (94) having an external thread (92) are not rotatable relative to one another. ### Claim 3 (depends on 1) The injection device according to claim 1, in which, during the preselection of an injection dose, the metering element (66, 88; 166) and the first element (94) comprising an external thread (92) are rotatable together relative to the housing (52). ### Claim 4 (depends on 1) The injection device according to claim 1, in which, during an injection operation, the metering element (66, 88; 166) and the first element (94) comprising an external thread (92) are rotatable relative to one another. ### Claim 5 (depends on 1) The injection device according to claim 1, in which the metering element (66, 88; 166) that is arranged rotatably relative to the housing (52) is arranged axially nondisplaceably in the housing (52). ### Claim 6 (depends on 1) The injection device according to claim 1, having a coupling arrangement (98, 99) that is coupled axially displaceably, but nonrotatably, to the first element (94). ### Claim 7 (depends on 1) The injection device according to claim 1, having a coupling arrangement (K2) that is implemented to transfer a dose-setting motion to the metering element (66) for preselection of a desired injection dose. ### Claim 8 (depends on 1) The injection device according to claim 1, in which the metering element is implemented as a sleeve (66, 88;166). ### Claim 9 (depends on 1) The injection device according to claim 1, further comprising a coupling apparatus (K2, 146, 148, 150) that is uncoupled during an injection operation. ### Claim 10 (depends on 1) The injection device according to claim 1, wherein the first element equipped with an external thread (92) is implemented as a plunger (94) that is equipped with an external thread (92). ### Claim 11 (depends on 1) The injection device according to claim 1, wherein a proximal end (95) of the first element (94) is mounted rotatably in a pressure application element (96) which is implemented for the ejection of injection fluid (32) from a container (34) for such a fluid (32), said proximal end (95) of the first element (94) being arranged in a recessed manner in the pressure application element (96). ### Claim 12 (depends on 1) The injection device according to claim 1, wherein the metering element is implemented as a sleeve (66; 166). ### Claim 13 An injection device comprising a housing (52); a container (34) for the reception of injection fluid (32), which container (34) is connectable to the housing (52); a metering element (66, 88; 166) that is implemented rotatably, but not axially displaceably, relative to the housing (42, 52); an external thread (72) associated with the metering element (66, 88; 166); a sleeve-shaped element (116) that is implemented axially movably in the housing (52) but not rotatably relative to the housing (52) and has an internal thread (118) that is in engagement with the external thread (72) of the metering element (66, 88; 166), in order to enable, by rotation of the metering element (66, 88; 166) relative to the housing (52), an axial displacement of the sleeve-shaped element (116) in the housing (52) and thereby the setting of an injection dose; and a coupling arrangement (K1) that is in engagement with the sleeve-shaped element (116) during the injection operation and is decouplable from the sleeve-shaped element (116) for preselection of a desired injection dose. ### Claim 14 (depends on 13) The injection device according to claim 13, in which display values (70) for the injection dose are provided on the metering element (66, 88; 166). ### Claim 15 (depends on 14) The injection device according to claim 14, in which the display values (70) are arranged in a substantially helical configuration on the metering element (66; 166). ### Claim 16 (depends on 13) The injection device according to claim 13, further comprising a first viewing window (54) provided in the housing (52) of the injection device; and a second viewing window (130) that is provided in the sleeve-shaped element (116) and is axially displaceable relative to the first viewing window (54), in order to make visible, on the outer side (68) of the metering element (66; 166), through the first viewing window (54) and the second viewing window (130), a display value (70) for the injection dose on the outer side (68) of the metering element (66; 166). ### Claim 17 (depends on 16) The injection device according to claim 16, in which the second viewing window (130) provided in the sleeve-shaped element (116) is dimensioned so that it corresponds substantially to an area occupied by a display value (70) for the injection dose and, with its periphery (134, 136), covers adjacent display values. ### Claim 18 (depends on 16) The injection device according to claim 16, in which the first viewing window (54) provided in the housing (52) has the shape of an elongated opening whose longitudinal axis extends substantially parallel to a longitudinal direction of the housing (52). ### Claim 19 (depends on 16) The injection device according to claim 16, in which the elongated opening of the first viewing window (54) provided in the housing (52) is dimensioned so that, in the proximal end position of the second viewing window (130), the minimum dose value, and in the distal end position of the second viewing window (130) the maximum dose value, is visible through the relevant viewing windows (54, 130). ### Claim 20 (depends on 13) The injection device according to claim 13, wherein the metering element is implemented as a sleeve (66; 166). ### Claim 21 (canceled)