Source: http://www.google.com/patents/US5881719?dq=5,893,120
Timestamp: 2016-08-31 07:24:25
Document Index: 83164581

Matched Legal Cases: ['art 2', 'art 2', 'art 3', 'art 2', 'art 3', 'art 3', 'art 2', 'art 3', 'art 3', 'art 3']

Patent US5881719 - Inhaler for administering medicaments from blister packs - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inPatentsThe present invention relates to an inhaler for administering medicaments (38) from blister packs (5), which has a housing with a mouthpiece (1) on one side, an air inlet opening (32) on the opposite side and, between them on the inside, a duct (7) which connects the mouthpiece (1) and the air inlet...http://www.google.com/patents/US5881719?utm_source=gb-gplus-sharePatent US5881719 - Inhaler for administering medicaments from blister packsAdvanced Patent SearchPublication numberUS5881719 APublication typeGrantApplication numberUS 08/671,739Publication dateMar 16, 1999Filing dateJun 28, 1996Priority dateJun 30, 1995Fee statusLapsedAlso published asCA2225999A1, CA2225999C, CN1112222C, CN1189782A, DE19523516C1, DE69615033D1, DE69615033T2, EP0835148A1, EP0835148B1, WO1997002061A1Publication number08671739, 671739, US 5881719 A, US 5881719A, US-A-5881719, US5881719 A, US5881719AInventorsWolfgang Gottenauer, Andre Narodylo, Joachim GoedeOriginal AssigneeAsta Medica AktiengesellschaftExport CitationBiBTeX, EndNote, RefManPatent Citations (22), Non-Patent Citations (1), Referenced by (159), Classifications (11), Legal Events (10) External Links: USPTO, USPTO Assignment, EspacenetInhaler for administering medicaments from blister packs
US 5881719 AAbstract
1. An inhaler for administering powdered medicaments from strip shaped blister packs, said blister packs each comprising a container film defining a plurality of blister cavities, one side of each said blister cavity having a generally convex outer surface, said cavities filled with powdered medicament, and a covering film for enclosing and sealing said plurality of cavities, said inhaler comprising:an elongated housing, said housing having first and second housing members; a hinge interconnecting said first and second housing members; said first housing member having a support means for supporting said blister pack, said support means including a recess, said covering film directly overlaying said recess when said blister pack is supported on said support means; a mouthpiece connected to said elongated housing; and an air inlet opening in said elongated housing; a duct interconnecting said mouthpiece and said air inlet opening, said recess directly opening into said duct for directly conveying the medicament from one of said blister cavities into said duct when said covering film is ruptured; a plunger operably associated with said housing for pressing on one of said blister cavities and for rupturing said covering film to convey said medicament from said one cavity into said recess, said plunger including a concave plunger surface generally corresponding in shape to said generally convex outer surface of said blister cavities, said concave plunger surface having an edge for contacting said generally convex outer surface asymmetrically transversely to the longitudinal axis of said elongated housing whereby, upon the rupturing of said covering film, a tag is formed at the rupture in said covering film which does not impede the flow of air in said air duct. 2. An inhaler according to claim 1 wherein said mouthpiece is connected to said first housing member and said plunger includes an actuator means for depressing said plunger and for rupturing said covering film, said plunger mounted in said second housing member.
8. Inhaler according to claim 1, wherein said plunger has a longitudinal axis and wherein said concave plunger surface includes an edge which lies in a plane which extends at an angle other than 90� relative to the longitudinal axis of said plunger, the plane of said edge intersecting a perpendicular plane extending in the longitudinal direction of the housing, such that the plunger engages said generally convex outer surface of one of said blister cavities asymmetrically.
9. Inhaler according to claim 1, wherein said plunger includes a longitudinal axis and said concave plunger surface includes an edge which lies in a plane which extends at an angle of 90� relative to the longitudinal axis of said plunger, said plunger connected to said housing by a lever, said lever pivotally connected to said housing, whereby, when said lever is depressed, said plunger moves in an arc about the pivot of said lever so that said edge first contacts a side of the generally convex outer surface of one of said blister cavities.
In order to achieve defined tearing-open of the covering foil when using customary blister packs, the plunger must engage asymmetrically on the blister cavity during the pressing-out operation. This is achieved, for example, by the pressing-out plunger itself having an asymmetrical cross-section, i.e. the edge of the curved plunger surface extends in a plane which, at an angle not equal to 90� relative to the longitudinal axis of the plunger, intersects a perpendicular plane extending in the longitudinal direction of the housing, so that the plunger engages firstly on one side of the outwardly curved blister cavity when it is pressed down. The covering foil then tears open firstly in this contact region, while it remains connected to the remaining covering foil on the opposite side of the cavity. A likewise asymmetrical engagement of the plunger on the blister cavity is achieved in a symmetrically designed pressing-out plunger if the latter is connected to the housing laterally by means of a lever arm in such a way that the plunger, when it is pressed down by the user, carries out a movement along an arc about the pivot of the housing part, and that the engagement on the blister cavity firstly takes place on one side. The pressing-out plunger of asymmetrical cross-section in the longitudinal direction can also be combined with the lever arrangement. Of course, the blister packs with asymmetrical cavities described above can also be used in an inhaler in which the pressing-out device engages asymmetrically on the blister cavity.
In the embodiment of the present invention illustrated in FIG. 1, the pressing-out device is designed as a single lever 2 which constitutes the upper part 2 of the housing at the same time. The upper part 2 of the housing is connected to the bottom part 3 of the housing by means of a film hinge, the upper part 2 of the housing engaging slightly beyond the bottom part 3 of the housing in the fitted-together state. A mouthpiece 1, shaped essentially like a truncated cone, is attached to the narrow side of the bottom part 3 of the housing. Located in the single lever 2 is a rectangular recess 27 in which the approximately square grip plate 4 of the pressing-out plunger 10 engages (not visible in FIG. 1). The grip plate 4 is displaceable in the recess 27, it being possible for the said grip plate to be fixed in an engaging manner in the positions a, b, c or d by means of corresponding notches 28. Prior to the inhaling operation, the displaceable pressing-out plunger 10 must be pushed by means of the grip plate 4 over a blister cavity 31 which has not yet been emptied (not visible in FIG. 1), i.e. the pressing-out plunger 10 is positioned with the engaging function at one of the four pressing-out positions a, b, c or d. By pressing down the upper part (single lever) 2 of the housing, the blister cavity 31 located below the pressing-out plunger 10 is pressed out. In this embodiment of the inhaler, the pressing-out of a blister cavity 31 can take place not only with the index finger and thumb, but also with the whole hand, since the single lever 2 provides a broad application surface. In order to prevent slipping-off, it is additionally provided on the surface with longitudinally extending gripping grooves 35. The arcuate recess 36 in the upper part 2 of the housing and the gripping grooves 35 in the bottom part 3 of the housing facilitate the opening of the housing. In the fitted-together state, the housing is held closed by means of a pin 42 which engages in a cutout 41 in the mouthpiece 1 and the bottom part 3 of the housing. The pin 42 is attached to the upper part of the housing or single lever 2 and can be lowered in the cutout 41 when the single lever 2 is pivoted down. In order then to avoid the single lever 2 pivoting up, the mouthpiece 1, which is rotatable, is turned through about 30�. The wall of the mouthpiece 1 slides over the end of the pin 42 in such a way that the opening operation is blocked, but the single lever 2 can nevertheless be pressed downwards to press out a blister cavity 31. To open the housing, the mouthpiece 1 is turned back in the opposite direction so that the part of the cutout 41 on the mouthpiece 1 exposes the pin 42 on the single lever 2, and the single lever 2 can be pivoted upwards.
FIGS. 9 and 10 are cross-sectional illustrations of the inhaler according to FIGS. 7 and 8 with a pressing-out plunger 10 designed for asymmetrical engagement on the blister cavity. It cannot be seen in the longitudinal section of FIG. 8 at what angle the edge of the curved surface 37 extends relative to the longitudinal axis of the plunger 10. If the angle is not equal to 90�, the edge always intersects a plane extending perpendicular to the longitudinal axis of the housing, i.e. to the air flow, so that the cross-section of the plunger is of asymmetrical design transversely to the longitudinal axis of the housing. Only in this way is it guaranteed that the severed covering foil, the tag 8, is aligned parallel to the air flow after the pressing-out operation and does not impede the air flow. This is to be explained again with reference to FIGS. 9 and 10. FIG. 9 shows the inhaler with the housing flap 23 closed and a blister strip 5 inserted, the asymmetrical cross-section of the pressing-out plunger 10 being achieved in that the edge of the curved surface 37 of the plunger 10 extends at an angle not equal to 90� relative to the longitudinal axis of the plunger, and this plane of the edge intersects a perpendicular plane extending in the longitudinal direction of the housing. The curved surface 37 engages further around part of the corresponding surface of the blister cavity 31 than over the remaining part, such that the covering foil 39 is firstly torn open by the plunger 10 at a predetermined point. The blister strip 5 is pressed onto the bottom part 3 of the housing by the elastic webs 6 so that there is an airtight closure. The pressing-out plunger 10 is shaped asymmetrically in cross-section, so that the container film 33 is stretched to a greater extent on one side during the pressing-out operation (FIG. 10), and the covering foil 39 tears open at this point below the more greatly loaded container film 33 and remains connected to the remaining covering foil 39 on the opposite side. The medicament 38 drops through the supply opening 20 into the air duct 7. The tag 8 of the covering foil 39 hangs down, aligned parallel to the air flow, into the supply opening 20, extending right into the air duct 7.
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A61M15/0045, A61M2202/064European ClassificationA61M15/00C2Legal EventsDateCodeEventDescriptionAug 23, 1996ASAssignmentOwner name: ASTA MEDICA AKTIENGESELLSCHAFT, GERMANYFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:GOTTENAUER, WOLFGANG;NARODYLO, ANDRE;GOEDE, JOACHIM;REEL/FRAME:008100/0156;SIGNING DATES FROM 19960626 TO 19960702Sep 6, 2002FPAYFee paymentYear of fee payment: 4Feb 7, 2003ASAssignmentOwner name: SOFOTEC GMBH & CO. 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KG;REEL/FRAME:023928/0129Effective date: 20100127Oct 18, 2010REMIMaintenance fee reminder mailedMar 16, 2011LAPSLapse for failure to pay maintenance feesMay 3, 2011FPExpired due to failure to pay maintenance feeEffective date: 20110316RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services