Source: http://www.google.com/patents/US20060189938?ie=ISO-8859-1
Timestamp: 2015-05-05 05:43:37
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Matched Legal Cases: ['art 1', 'art 2', 'arts 1', 'arts 1', 'art 1', 'art 2', 'art 2', 'art 2', 'art 1', 'art 1', 'art 1', 'arts 1', 'art 1', 'art 1', 'art 1', 'art 1', 'art 1', 'art 2', 'art 2']

Patent US20060189938 - Automatic injector with a release lock - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsAn injection device including a contact element which is pressed onto a body tissue for an injection, a release for initiating product dispensing, which contact element and release are respectively displaceable along a longitudinal axis of the device between an initial position and an end position, wherein...http://www.google.com/patents/US20060189938?utm_source=gb-gplus-sharePatent US20060189938 - Automatic injector with a release lockAdvanced Patent SearchPublication numberUS20060189938 A1Publication typeApplicationApplication numberUS 11/355,910Publication dateAug 24, 2006Filing dateFeb 16, 2006Priority dateFeb 18, 2005Also published asDE102005007614A1Publication number11355910, 355910, US 2006/0189938 A1, US 2006/189938 A1, US 20060189938 A1, US 20060189938A1, US 2006189938 A1, US 2006189938A1, US-A1-20060189938, US-A1-2006189938, US2006/0189938A1, US2006/189938A1, US20060189938 A1, US20060189938A1, US2006189938 A1, US2006189938A1InventorsEdgar Hommann, Pascal BaerOriginal AssigneeEdgar Hommann, Pascal BaerExport CitationBiBTeX, EndNote, RefManReferenced by (24), Classifications (10), Legal Events (1) External Links: USPTO, USPTO Assignment, EspacenetAutomatic injector with a release lock
DETAILED DESCRIPTION OF THE DRAWINGS With regard to fastening, mounting, attaching or connecting components of the present invention to form an injection device or components thereof, unless specifically described otherwise, such are intended to encompass conventional fasteners such as threaded connectors, snap rings, detent arrangements, clamps, pins and the like. Components may also be connected by adhesives, glues, welding, ultrasonic welding, and friction fitting or deformation, if appropriate, and appropriate liquid and/or airtight seals or sealing devices may be used. Electronic features of the device, if any, may be commercially available electronic components, connectors and devices such as suitable wiring, connectors, printed circuit boards, microchips, sensors, inputs, outputs and the like. Unless specifically otherwise disclosed or taught, materials for making the present invention and/or components thereof may be selected from appropriate materials such as metal, metallic alloys, ceramics, plastics and the like, and appropriate manufacturing or production methods including casting, pressing, extruding, molding and machining may be used. FIG. 1 illustrates an injection device proposed by the invention, comprising housing comprising a proximal housing part 1 and a distal housing part 2 connected to it. Since the embodiment illustrated is a disposable automatic injector, the two housing parts 1 and 2 are non-releasably connected to one another by means of a housing lock 21, i.e. the two housing parts 1 and 2 can not be detached from one another other than by breaking at least one of the two housing parts. Accommodated in the housing is an ampoule 28, which has a plunger 25 at its proximal end, which is longitudinally displaceable in the ampoule 28. A needle 24 is attached to the distal end of the ampoule. The ampoule 28 is accommodated in an ampoule holder 20, which can be displaced relative to the housing in the direction of the longitudinal axis L, in particular by the distance d. A release cam 23 is provided on the needle protector sleeve 3. The release cam 23 specifically has the shape of a fin or a wedge, which tapers in the distal direction and has an end face at its proximal end extending more or less perpendicular to the longitudinal axis L. The ampoule holder 20 has a cam or collar pointing radially outwards at its end pointing in the proximal direction P. Disposed in the front housing part 1 is a contact element provided in the form of a needle protector sleeve 3, which is displaceable relative to the housing in the direction of the longitudinal axis L. The needle protector sleeve 3 projects out from the end of the distal housing part 2 pointing in the distal direction D by the distance a. The end of the needle protector sleeve 3 also projects out from the tip of the needle 24 by the distance b in the distal direction D. When the injection device is in the initial position, the distance a is shorter than the distance b. Also disposed in the distal housing part 2 is a functional sleeve 18, which is axially displaceable relative to the housing part 2. The functional sleeve 18 has a lock arm 22 and a lock element 17. The lock element 17 is designed to be biased by the functional sleeve 18 via an arm. At its end pointing in the proximal direction P, the lock element 17 has a surface extending transversely to the longitudinal axis L, which co-operates with a complementary surface disposed on the ampoule holder 20 and forms a transmission mechanism. The lock element is advantageously biased via the arm of the functional sleeve 18 transversely to the longitudinal axis L so that the two transmission surfaces lie abutting with one another. The lock arm 22 disposed in the region of the release cam 23 is resiliently formed by the functional sleeve 18 and is biased so that it presses against the release cam 23. Disposed at the proximal end of the proximal housing part 1 is a release means 7, which is displaceable relative to the housing part 1 along the longitudinal axis L. The release means 7 is sleeve-shaped and is closed at its proximal end, forming a knob. The release element 7 is pushed into a proximal position by the return spring 15, namely the initial position. The return spring 15 is supported at its end pointing in the distal direction D on a collar extending radially outwards from a sliding sleeve 4, which is displaceable along the longitudinal axis L in the proximal housing part 1. When the housing parts 1 and 2 are connected, the needle protector sleeve 3 and the sliding sleeve 4 abut with one another by their end faces. The return spring 15 pushes the sliding sleeve 4 and hence also the needle protector sleeve 3 in the distal direction D and holds the needle protector sleeve 3 in its initial position. Conversely, a movement of the needle protector sleeve 3 causes the sliding sleeve 4 to be driven in the proximal direction P. The return spring 15 is pushed back across the distance c. The proximal housing part 1 also has a sleeve 12, which is essentially stationary relative to the proximal housing part 1. The sleeve 12 forms a lock member 6 on a resilient arm and is elastically displaceable transversely to the longitudinal axis L. At its end pointing in the proximal direction P, the lock member 6 has an oblique transmission surface, which co-operates with a transmission surface formed on the release means 7. The mutually abutting surfaces are able to slide on one another and thus form a transmitting mechanism capable of causing a longitudinal movement of the release means 7 to be converted into a movement of the lock member 6 directed transversely to the longitudinal axis L. In the state illustrated in FIG. 1, however, the lock member 6 is not able to move transversely to the longitudinal axis L because the lock member 6 is held in engagement with the release means 7 via the release member 5 disposed on the same level as the lock member 6 in the longitudinal direction L. The sleeve 12 also has an unlatching member 10 provided on a resilient arm, which prevents a plunger rod 27 from moving in the distal direction D. The plunger rod 27 is displaceable relative to the housing along the longitudinal axis L. The sleeve-shaped plunger rod is closed at its end pointing in the distal direction D or at least forms a circumferentially extending, e.g. annular, distal spring stop pointing radially inwards. The plunger rod co-operates with the plunger 25 by means of its end face pointing in the distal direction D. Disposed at the proximal end of the plunger rod is a shoulder 31 pointing radially outwards, in particular a circumferentially extending, annular shoulder 31. A drive spring 16 accommodated in the plunger rod is supported on a distal end of the plunger rod 27 and on a support stop. The support stop 26 may be provided by the housing 1 or, as illustrated in FIG. 1, by the sleeve 12. In the position illustrated, the drive spring 16 is in the biased state, pushed back in the longitudinal direction L. An oblique surface provided on the shoulder 31 of the plunger rod 27 is able to push the unlatching member 10 radially outwards due to the biasing force of the drive spring 16, but this is prevented by means of a radially abutting portion of the release means 7. When the plunger rod 27 is positioned as illustrated in FIG. 1, therefore, the drive spring 16 is not able to move it in the distal direction D. The proximal housing part 1 surrounds a latch sleeve 13, which constitutes a latch member 8. The latch member 8 is disposed on a resilient arm of the latch sleeve 13 and can be elastically moved transversely to the longitudinal direction L. The latch member 8 has an oblique surface at its end directed towards the release means 7, which converts a longitudinal movement of the release means 7 into a movement of the latching member 8 directed transversely to the longitudinal axis L. The latch sleeve 13 is stationary relative to the housing part 1. The return spring 15 is surrounded by a sleeve-shaped display element 14. The display element 14 has a tubular portion, which is mounted so that it guides and can move the plunger rod 27 lengthways. Between a distal end of the display element 14 and the collar of the ampoule 28 pointing radially outwards is the distance e. The display element 14 may have a scale divided into portions or some other marking in the longitudinal direction, which can be viewed through a window 29 disposed in the housing part 1 and in the latch sleeve 13. In the disposition illustrated in FIG. 1, the release means 7 can not be operated, namely the release means 7 can not be pushed in the distal direction D, because the release member 5 prevents the lock member 6 from effecting a movement radially inwards. In FIG. 2, the needle protector sleeve 3 has been pushed back in the proximal direction P, causing the release element 19 to release the lock element 17 of the functional sleeve 18 radially outwards. Due to the reduction in the distance a, the release member 5 moves in the proximal direction P because the needle protector sleeve 3 drives the sliding sleeve 4 with it. The return spring 15 is pushed back in the longitudinal direction L due to the reduction in distance a. The release member 5 has now released the lock member 6 at its side pointing radially inwards. When the release means 7 is operated so that it moves by the distance f in the distal direction, an unlatching recess 11 disposed on the release means 7 is moved in the longitudinal direction L to the same height as the unlatching member 10, as illustrated in FIG. 3, so that the unlatching member 10 is able to latch in the unlatching recess 1 1. The shoulder 31 of the plunger rod 27 pointing radially outwards is now released from the unlatching member 10 at its end pointing in the distal direction D. Also as a result of the release means 7 being operated, the lock member 6 has moved radially inwards by the co-operating transmission surfaces of the lock member 6 and release means 7, thus enabling the release means 7 to move into its end position illustrated in FIG. 3. As the release means 7 moves into its end position, the latch member 8 is pushed radially outwards due to its oblique surface, so that when the release means 7 is in the end position, the latch member 8 latches in the latching recess 9 formed by the release means 7. The release means 7 is no longer able to move back in the proximal direction P. As illustrated in FIG. 4, the plunger rod 27 is pushed in the distal direction D, driven by the biased drive spring. The force exerted on the plunger 25 as a result acts on the preferably liquid product contained in the ampoule 28, but because of its viscosity and the fine needle passage of the needle 24, the force acting in the distal direction D is initially transmitted to the ampoule 28. Since the ampoule 28 is accommodated in the ampoule holder 20, which is disposed so as to be longitudinally displaceable in the distal housing part 2, the ampoule holder 20 incorporating the ampoule 28 and the needle is initially moved in the distal direction D, so that the needle 24 is able to pierce a body tissue. The ampoule holder 20 is pushed in the distal direction D by the distance d illustrated in FIG. 1 until the collar 30 abuts with the functional sleeve 18. Accordingly, the lock element 17 is pushed radially outwards by the surface of the ampoule holder 20 pointing in the distal direction D and now lies against the outer periphery of the ampoule holder 20 due to its inwardly acting biasing action. As illustrated in FIG. 5, when the collar 30 is abutting with the functional sleeve 18, the plunger 25 is pushed in the distal direction D in the ampoule 28 by the drive spring 16 and the fluid contained in the ampoule 28 is dispensed. As the plunger rod 27 effects the dispensing movement, the display element 14 is driven with it via its tubular portion by the shoulder 31 of the plunger rod 27 directed radially outwards. A reading can be taken of the markings on the display element 14 through the window 29. As illustrated in FIG. 6, as the needle 24 is extracted from the body tissue, the return spring 15 pushes the sliding sleeve 3 in the distal direction D, as a result of which the needle protector sleeve 3 is also moved in the distal direction D and pushes the lock element 17 radially outwards by means of its oblique portion pointing in the distal direction D. The needle protector sleeve 3 now covers the needle 24. In particular, the needle protector sleeve 3 projects beyond the tip of the needle 24 in the longitudinal direction L by the distance d. The distal end of the needle protector sleeve 3 is spaced at a distance a apart from the distal housing part 2. As the sliding sleeve 4 moves in the distal direction D, the release member 5 is also moved with it. The oblique transmission surface of the release member 5 pointing in the distal direction D is able to co-operate with the transmission surface of the lock member 6 and thus move the lock member 6 radially inwards so that the release member 5 is able to pass the lock member 6 in the longitudinal direction L. Also as the needle protector sleeve 3 moves in the distal direction D, the lock arm 22 is moved radially outwards by the transmission surface of the lock cam 23, as a result of which the lock cam 23 is able to pass the lock arm 22. In order to save space when disposing of the injection device after use, the needle protector sleeve 3 can be moved back into the housing, as illustrated in FIG. 7, but without the needle 24 projecting out from the needle protector sleeve 3. As the needle protector sleeve 3 is moved back, the lock cam 23 moves so that its end pointing in the proximal direction P comes into abutment with the end face of the arm 22 pointing in the distal direction D and thus moves the functional sleeve 18 with it as the needle protector sleeve 3 continues to move. In order to prevent the needle protector sleeve 3 from being pushed back out of the housing due to the spring force of the drive spring 16, a locking lug is provided on the functional sleeve 18, which latches with the housing 1; 2 and axially blocks the functional sleeve 18 when the functional sleeve 18 or needle protector sleeve 3 has been moved back into the housing. While multiple illustrative embodiments, including preferred embodiments, are disclosed, still other embodiments and/or aspects of the present invention will become apparent to those skilled in the art. As will be realized, the invention is capable of modifications in various obvious aspects, all without departing from the spirit and scope of the present invention. Accordingly, the drawings and detailed description are to be regarded as illustrative in nature and not restrictive, and all such modifications and variations are within the scope of the invention as determined by the appended claims when interpreted in accordance with the breadth to which they are fairly, legally, and equitably entitled. Referenced byCiting PatentFiling datePublication dateApplicantTitleUS7976499Apr 11, 2007Jul 12, 2011Becton, Dickinson And CompanyAutomatic injection deviceUS8092419 *Nov 23, 2009Jan 10, 2012Lts Lohmann Therapie-Systeme AgDisposable injector with at least one support rodUS8298175Aug 10, 2010Oct 30, 2012Tecpharma Licensing AgAdministering device with blockable actuation elementUS8333730 *Jun 15, 2011Dec 18, 2012Lts Lohmann Therapie-Systeme AgSingle-use injector having a flexurally elastic metal housingUS8357125Sep 25, 2007Jan 22, 2013Becton, Dickinson And CompanyAutoinjector with deactivating means moveable by a safety shieldUS8491530Sep 25, 2007Jul 23, 2013Becton Dickinson FranceAutoinjector with trigger positionable in active position by movement of a safety shield and indication of the active positionUS8500693Sep 25, 2007Aug 6, 2013Becton Dickinson FranceAutoinjector received in external socketUS8568359Sep 25, 2008Oct 29, 2013Becton Dickinson FranceAutoinjectorUS8591463Mar 8, 2013Nov 26, 2013Teva Pharmaceutical Industries Ltd.Re-useable injector device for syringeUS8652100Mar 8, 2013Feb 18, 2014Teva Pharmaceutical Industries, Ltd.Re-useable injector device for syringeUS8876778 *Sep 29, 2008Nov 4, 2014Becton Dickinson FranceInjection device with retaining means actuated by needle shieldUS8968236 *Mar 21, 2006Mar 3, 2015Cilag Gmbh InternationalInjection deviceUS20110213312 *Sep 29, 2008Sep 1, 2011Becton Dickinson FranceInjection device with retaining means actuated by needle shieldUS20110245761 *Mar 21, 2006Oct 6, 2011Douglas Ivan JenningsInjection deviceUS20110251550 *Jun 15, 2011Oct 13, 2011Rudolf MatuschSingle-use injector having a flexurally elastic metal housingEP2468342A1 *Dec 21, 2010Jun 27, 2012Sanofi-Aventis Deutschland GmbHFront end for an auto-injectorWO2009040602A1 *Sep 25, 2007Apr 2, 2009Becton Dickinson FranceAutoinject0r with deactivating means moveable by a safety shieldWO2009040604A1 *Sep 25, 2007Apr 2, 2009Becton Dickinson FranceAutoinjector received in external socketWO2009040605A1 *Sep 25, 2007Apr 2, 2009Becton Dickinson FranceAutoinjector with trigger positionable in active position by movement of a safety shield and indication of the active positionWO2009040607A1 *Sep 25, 2007Apr 2, 2009Becton Dickinson FranceAutoinjector with deactivating means moveable by a safety shieldWO2009040672A2Sep 25, 2008Apr 2, 2009Becton Dickinson FranceAutoinjector with container retaining means deactivatable by a safety shieldWO2009095701A1 *Feb 2, 2009Aug 6, 2009Barry Peter LiversidgeAutomatic injection device with hidden triggerWO2012085033A1 *Dec 21, 2011Jun 28, 2012Sanofi-Aventis Deutschland GmbhFront end for an auto-injectorWO2012138285A1 *Mar 30, 2012Oct 11, 2012Shl Group AbMedicament delivery device comprising a locking mechanism having a lever* Cited by examinerClassifications U.S. Classification604/137International ClassificationA61M5/20Cooperative ClassificationA61M5/326, A61M2005/208, A61M2005/3267, A61M2005/2013, A61M2005/206, A61M2005/3247, A61M5/2033European ClassificationA61M5/20CLegal EventsDateCodeEventDescriptionApr 24, 2006ASAssignmentOwner name: TECPHARMA LICENSING AG, SWITZERLANDFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:HOMMANN, EDGAR;BAER, PASCAL;REEL/FRAME:017813/0113;SIGNING DATES FROM 20060328 TO 20060401RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services