Source: http://www.google.com/patents/US20020007154?dq=6,123,819
Timestamp: 2015-06-02 04:25:56
Document Index: 550845708

Matched Legal Cases: ['art 20', 'art 20', 'art 20', 'art 20', 'art 37', 'art 38', 'art 20', 'art 20', 'art 20', 'art 38', 'art 20']

Patent US20020007154 - Injection device, a preassembled dose setting and injection mechanism for an ... - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsAn injection device made up from a housing, a dose setting and injection mechanism, a dose setting member and an injection button is described. The dose setting and injection mechanism is made as a preassembled unit insertable into the housing. Both the dose setting member and the injection button is...http://www.google.com/patents/US20020007154?utm_source=gb-gplus-sharePatent US20020007154 - Injection device, a preassembled dose setting and injection mechanism for an injection device, and a method of assembling an injection deviceAdvanced Patent SearchPublication numberUS20020007154 A1Publication typeApplicationApplication numberUS 09/846,798Publication dateJan 17, 2002Filing dateMay 1, 2001Priority dateMay 4, 2000Also published asUS6692472Publication number09846798, 846798, US 2002/0007154 A1, US 2002/007154 A1, US 20020007154 A1, US 20020007154A1, US 2002007154 A1, US 2002007154A1, US-A1-20020007154, US-A1-2002007154, US2002/0007154A1, US2002/007154A1, US20020007154 A1, US20020007154A1, US2002007154 A1, US2002007154A1InventorsSteffen Hansen, Thomas MillerOriginal AssigneeSteffen Hansen, Miller Thomas DedenrothExport CitationBiBTeX, EndNote, RefManReferenced by (18), Classifications (26), Legal Events (3) External Links: USPTO, USPTO Assignment, EspacenetInjection device, a preassembled dose setting and injection mechanism for an injection device, and a method of assembling an injection device
BRIEF DESCRIPTION OF THE DRAWINGS [0032] The invention will be explained more fully below in connection with a preferred embodiment and with reference to the drawings in which: Shows an exploded view of the prior art injection device. Shows an exploded top view of the injection device according to the invention. Shows an exploded bottom view of the injection device according to the invention. Shows an exploded view of the preassembled dose setting and injection mechanism. Shows a schematically bottom view of the preassembled dose setting and injection mechanism. Shows a schematically top view of the preassembled dose setting and injection mechanism. [0033] The figures are schematic and simplified for clarity, and they just show details, which are essential to the understanding of the invention, while other details are left out. Throughout, the same reference numerals are used for identical or corresponding parts. DETAILED DESCRIPTION OF EMBODIMENTS [0034]FIG. 1 shows an injection device according to the preamble of claim 1. This injection device contains three basic parts; a dose setting and injection mechanism being fully built into the housing 10, a dose-setting member 6 and an injection button 9. The dose setting and injection mechanism contains a piston rod 1 and a piston rod drive comprising gear wheels 2 and 3, a coupling ring 4, and a driver 5. The dose-setting member 6 for setting up a dose is integral with the carrier 7 and the finger grip 8. The injection button 9 works a not shown gearwheel placed at the hub of the coupling ring 4. When setting up a dose by rotating the dose-setting member 6, the coupling ring 4 is rotated due to the carrier 7 placed on the dose-setting member 6. This rotation will lift the injection button 9 away from the device. Pressing back the injection button 9 will cause the coupling ring 4 to rotate, since this ring through a unidirectional coupling is connected to the driver 5, this driver 5 will also rotate. A not shown gear wheel placed on the hub of the driver 5 engages the first gear wheel 3 which again engages the second gear wheel 2 and advances the piston rod 1. A more detailed description of this prior art injection device is given in WO 98/56436. [0035] An injection device according to the invention is shown in FIG. 2. This device is made from a housing 10 containing a cartridge 13 containing medicine sufficient for a number of dosed injections. Inserted into the housing 10 is a preassembled dose setting and injection mechanism 14, which inside the boundaries of the housing 10 is connected to the injection button 11 and to the dose-setting member 12. [0036] As shown in FIG. 3 the dose-setting member 12 has on its backside a carrier 15, which is connected to the preassembled dose setting and injection mechanism 14 as will be described later. Although only one carrier 15 is shown there could off cause be more than one carrier 15 if so wanted. The injection button 11 is connected to the preassembled dose setting and injection mechanism 14 through a toothed rack 16. The injection button 11 is preferably provided with a protrusion 17, which protrusion 17 is guided in a not shown track in the housing 10, which track has a not shown stop-pawl, which prevents the injection button 11 from being disconnected from the housing 10. When manufacturing the housing, this could be done by moulding the housing in two parts, which two parts then could be glued together, or otherwise connected. [0037] Referring now to FIG. 4 to 6, the preassembled dose setting and injection mechanism 14 is made up from a rod guiding part 20 in which a flexible piston rod 21 is guided. The rod guiding part 20 has a slot 31 and an inwardly pointing protrusion 39. The flexible rod 21 is being driven by a first gear wheel 22, which again is being driven by the hub-wheel 25 of the second gear wheel 23. The second gear wheel 23 is made up from an outer gear wheel 24, which is integral with a hub-wheel 25. The outer gearwheel 24 is driven by the hub-wheel 26 on the driver 27. This driver 27 also has an outer gear wheel 28, which is located inside the coupling ring 29 and in unidirectional contact with the coupling ring 29. The coupling ring 29 is provided with a hub-wheel 30, which hub-wheel 30 is driven by the toothed rack 16, guided in a slot 31, of the injection button 11 when the injection device is being operated. [0038] The entering part of the slot 31 formed in the rod guiding part 20 need not be formed as an open track-like slot 31 as shown in FIG. 6, but can easily be made as a slot 31 solely accessible from the periphery of the rod guiding part 20 i.e. similar to the exit part of the slot 31 shown in FIG. 5. [0039] The hub-wheel 30 of the coupling ring 29 is connected to the coupling ring 29 through a rigid part 37 and a flexible part 38. The coupling ring 29 has on its inside a number of barbs 40, which barbs 40 interconnects with the barbs 41 of the outer gear-wheel 28 of the driver 27. [0040] The barbs 41 at the outer gear wheel 28 of the driver 27 are by a protrusion 39 located on the rod guiding part 20 prevented from rotation in one direction. The direction in which the driver can move freely is the direction by which the piston rod 21 is moved forward in the cartridge 13. [0041] An arm 32 is at the centre 34 connected to the centre of the rod guiding part 20. On the other end, the arm 32 is equipped with a cam 35 interacting with a notch 42 provided at the rim of the coupling ring 29, thereby locking the arm 32 to the coupling ring 29. The arm 32 also has a depression 33 into which to the carrier 15 on the backside of the dose-setting member 12 is fitted. A second arm 36 is situated parallel to the first arm 32 and is connected thereto through a flexible beam. The second arm 36 has on its backside a not shown cam, situated near the centre 34. This cam is movable locked in the spiral shaped track of the driver 27. In this way the number of rotations the driver 27 can perform relatively to the second arm 32 and the rod guiding part 20 is limited, and the total length of the track is adapted to the total amount of medicine in the cartridge 13 thereby ensuring that a dose larger than the amount of medicine remaining in the cartridge 13 cannot be set. [0042] When operating the injection device the dose is set by turning the dose-setting member 12, which is connected to the arm 32. Due to the connection between the cam 35 on the arm 32 and the notch 42 on the coupling ring 29, the coupling ring 29 is rotated to. Since the hub 30 of the coupling ring 29 is connected to the toothed rack 16 of the injection button 11, this button 11 is lifted away from the injection device. Due to the protrusion 39 interfering with the barbs 41, the driver 27 is prevented from rotating, while the barbs 40 rides over the barbs 41 on the driver 27. This at the same times makes an audible sound. [0043] If a set dose is regretted the dose-setting member 12 is rotated in the opposite direction. Due to the flexible part 38 of the coupling ring 29, the coupling ring 29 expands outward, allowing the barbs 40 to slide over the barbs 41 of the driver 27. Hence the driver 27 is not affected by this backward rotation of coupling ring 29. [0044] The bulging ends 43, 44 provided at the coupling ring 29 rides over the barbs 45 situated on the inside of the rod guiding part 20 and keeps the coupling ring 39 stretched at all times such that the bulging ends 40 interconnects with the barbs 41 of the driver 27 [0045] When delivering the set dose, the injection button 11 is pressed home. The toothed rack 16 of the injection button 11 works the hub-wheel 30 of the coupling ring 29. This rotates the coupling ring 29, where the barbs 40 force the outer gear wheel 28 of the driver 27 and the hub-wheel 26 to rotate. The hub-wheel 26 rotates the outer gear wheel 24 of the second gear wheel 23 being integral with the hub-wheel 25, which rotates the first gear wheel 22. Rotation of the first gear-wheel 22 causes the piston rod 21 to advance inside the cartridge 13, thereby expelling the set dose of medicine though the not shown needle connected to the distal end of the cartridge 13. [0046] When manufacturing an injection device according to the invention, the dose setting and injection mechanism 14 is first assembled into a preassembled unit 14. Then the preassembled unit 14 is placed in the housing 10 and connected to the housing through suitable means. Pressing the carrier 15 into the depression 33 on the arm 32 of the preassembled unit 14 connects the dose-setting member 12 to the preassembled unit 14. Finally the injection button 11 is connected to the preassembled unit 14 by placing the toothed rack 16 of the injection button 11 into the slot 31 of the preassembled unit 14. [0047] Assembling the preassembled unit 14 can be done in one production line, while other production lines can do the final assembling of the various injection devices using the same preassembled unit 14. [0048] Some preferred embodiments have been shown in the foregoing, but it should be stressed that the invention is not limited to these, but may be embodied in other ways within the subject matter defined in the following claims. The principles described could e.g. easily be adapted to a pencil shaped injection device without derogating from the scope of the claims. Referenced byCiting PatentFiling datePublication dateApplicantTitleUS7220248 *Jun 21, 2005May 22, 2007M2 Medical A/SFlexible piston rodUS7807242Jun 22, 2006Oct 5, 2010Novo Nordisk A/STransparent, flexible, impermeable plastic container for storage of pharmaceutical liquidsUS8105279 *Sep 18, 2006Jan 31, 2012M2 Group Holdings, Inc.Dispensing fluid from an infusion pump systemUS8399078Nov 21, 2005Mar 19, 2013Novo Nordisk A/SFoilUS8517988 *Dec 17, 2009Aug 27, 2013Sanofi-Aventis Deutschland GmbhMotor mechanism for a drug delivery device and drug delivery deviceUS8608708Oct 23, 2009Dec 17, 2013Owen Mumford LimitedInjector apparatusUS8747369 *Jan 30, 2012Jun 10, 2014Asante Solutions, Inc.Dispensing fluid from an infusion pump systemUS8926568May 9, 2011Jan 6, 2015Shl Group AbMedicament delivery device comprising a manual activation member with improved gripping and activation abilitiesUS20120010568 *Dec 17, 2009Jan 12, 2012Sanofi-Aventis Deutschland GmbhMotor mechanism for a drug delivery device and drug delivery deviceUS20120130312 *Jan 30, 2012May 24, 2012Morten MernoeDispensing Fluid from an Infusion Pump SystemEP2370135A1 *Dec 8, 2009Oct 5, 2011Becton, Dickinson and CompanyLever and gear force multiplier medication delivery system for high pressure injection systemWO2004056411A2 *Dec 19, 2003Jul 8, 2004M 2 Medical AsFlexible piston rodWO2005072794A2 *Jan 28, 2005Aug 11, 2005M 2 Medical AsDisposable medicine dispensing deviceWO2005072795A2 *Jan 28, 2005Aug 11, 2005M 2 Medical AsDisposable medicine dispensing deviceWO2006003130A1 *Jun 27, 2005Jan 12, 2006Novo Nordisk AsA credit card sized injection deviceWO2011145998A1 *May 9, 2011Nov 24, 2011Shl Group AbA medicament delivery device comprising a manual activation member with improved gripping and activation abilities.WO2013153041A2 *Apr 8, 2013Oct 17, 2013Carebay Europe LtdInfusion deviceWO2014166888A1 *Apr 8, 2014Oct 16, 2014SanofiInjection device* Cited by examinerClassifications U.S. Classification604/207, 604/209International ClassificationA61M5/20, A61M5/315, A61M5/31Cooperative ClassificationA61M5/31595, A61M5/3146, A61M5/20, A61M5/31558, A61M5/31585, A61M5/31535, A61M5/31568, A61M2005/3152, A61M2005/31518, A61M5/3156, A61M5/31541, A61M5/31525, A61M5/31511, A61M5/3129, A61M5/3155European ClassificationA61M5/315E1, A61M5/315E2B1, A61M5/315F2B1, A61M5/31C, A61M5/315D, A61M5/20Legal EventsDateCodeEventDescriptionAug 16, 2011FPAYFee paymentYear of fee payment: 8Jul 17, 2007FPAYFee paymentYear of fee payment: 4Jul 6, 2001ASAssignmentOwner name: NOVO NORDISK A/S, DENMARKFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:HANSEN, STEFFEN;MILLER, THOMAS DEDENROTH;REEL/FRAME:011968/0154;SIGNING DATES FROM 20010607 TO 20010612Owner name: NOVO NORDISK A/S NOVO ALLEDK-2880, BAGSVAERD, (1)Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:HANSEN, STEFFEN /AR;REEL/FRAME:011968/0154;SIGNING DATESFROM 20010607 TO 20010612RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services