Claims for Patent: 8,690,837

Summary for Patent: 8,690,837

Title:	Mixing device for a two-chamber ampoule
Abstract:	A device for administering a product (e.g. a medicinal or therapeutic substance), the device including a receptacle for the product or constituents of the product and a casing, wherein the receptacle and casing are engaged, and an outer sleeve, wherein the casing can be moved relative to the receptacle into the outer sleeve.
Inventor(s):	Mori; Kevin (Burgdorf, CH), Kaenel; Celine (Zurich, CH), Drunk; Annette (Bern, CH), Hirschel; Jurg (Aarau, CH), Moser; Ulrich (Heimiswil, CH), Tschirren; Markus (Kirchberg, CH), Wymann; Martin (Liebefeld, CH), Harris; Scott (San Diego, CA), Ryan; Patrick J. (Boston, MA), Pidgeon; Andrew D. (Cambridge, GB), Tuckwell; Jonathan D. (Cambridge, GB), Mann; Richard (Cambridge, GB)
Assignee:	TecPharma Licensing AG (Burgdorf, CH)
Application Number:	12/951,637
Patent Claims:	1. An injection device for mixing two constituents to form a product and for administering the product, the injection device comprising: a casing; a receptacle engaged with the casing, the receptacle comprising a distal and a proximal end; a two-chamber ampoule accommodated by the receptacle and adapted to be inserted into the receptacle from the distal end of the receptacle; and an outer sleeve, wherein the outer sleeve substantially surrounds the receptacle and the casing is arranged between the outer sleeve and the receptacle and moveable relative to the receptacle and into the outer sleeve by a combined axial and rotational movement, by which movement the constituents are mixed in the two-chamber ampoule to form the product. 2. The injection device according to claim 1, wherein the receptacle and the outer sleeve are connected such that they are rotationally and axially fixed. 3. The injection device according to claim 1, wherein an annular gap is formed between the outer sleeve and the receptacle, into which at least part of the casing can be moved. 4. The injection device according to claim 1, wherein when the two-chamber ampoule is in the receptacle, the outer sleeve extends over some of the length of the receptacle and the ampoule. 5. The injection device according to claim 1, further comprising a plunger rod accommodated by the casing and axially fixed relative to the casing at least during a portion of the movement of the casing into the outer sleeve during mixing of the constituents in the two-chamber ampoule. 6. The injection device according to claim 5, wherein the plunger rod further comprises an injection button, and wherein prior to movement of the casing into the outer sleeve, the injection button is recessed in the casing, and at least during a portion of the movement of the casing into the outer sleeve, the injection button protrudes proximally out of the casing. 7. The injection device according to claim 1, further comprising a plunger rod comprising an engaging portion which extends over a portion of a length of the plunger rod and with which the casing or an element which is fixed relative to the casing engages and allows the plunger rod to axially shift to a limited extent relative to the casing. 8. The injection device according to claim 1, wherein the casing comprises at least one projection arranged on its outer circumference, the projection being wing-shaped and having a narrow portion extending axially relative to the injection device. 9. The injection device according to claim 8, wherein the casing further comprises a cylindrical, smooth surface. 10. The injection device according to claim 1, wherein the casing comprises at least one information portion which cannot be viewed when the casing moves into the outer sleeve or can be viewed through a window of the outer sleeve. 11. The injection device according to claim 1, wherein the casing comprises at least one information portion and the sleeve comprises a window, wherein when the casing moves into the outer sleeve the information portion can be viewed through the window. 12. The injection device according to claim 1, wherein the receptacle comprises a latching element which interacts with at least one latching counter member in at least one position of the casing in relation to the receptacle. 13. An injection device for mixing two constituents to form a product and for administering the product, the injection device comprising: a casing; a receptacle engaged with the casing; a two-chamber ampoule accommodated by the receptacle; an outer sleeve substantially surrounding the receptacle; and a plunger rod accommodated by the casing; wherein: the casing is arranged between the outer sleeve and the receptacle and is moveable relative to the receptacle and into the outer sleeve by a combined axial and rotational movement, by which movement the constituents are mixed in the two-chamber ampoule to form the product; and the plunger rod is axially fixed relative to the casing at least during a portion of the movement of the casing into the outer sleeve during mixing of the constituents in the two-chamber ampoule. 14. The injection device according to claim 13, wherein the casing is in a threaded engagement with the receptacle. 15. The injection device according to claim 13, wherein the casing comprises at least one projection arranged on its outer circumference, the projection being wing-shaped and having a narrow portion extending axially relative to the injection device. 16. The injection device according to claim 13, wherein the plunger rod further comprises an injection button, and wherein prior to movement of the casing into the outer sleeve, the injection button is recessed in the casing, and at least during a portion of the movement of the casing into the outer sleeve, the injection button protrudes proximally out of the casing. 17. An injection device for mixing two constituents to form a product and for administering the product, the injection device comprising: a casing; a receptacle engaged with the casing; a two-chamber ampoule accommodated by the receptacle; an outer sleeve substantially surrounding the receptacle; and a plunger rod accommodated by the casing; wherein: the casing is arranged between the outer sleeve and the receptacle and is moveable relative to the receptacle and into the outer sleeve by a combined axial and rotational movement, by which movement the constituents are mixed to form the product; the plunger rod is axially moveable relative to the casing at least during a portion of the movement of the casing into the outer sleeve; the plunger rod protrudes proximally out of the casing when the two-chamber ampoule is mixed; and the plunger rod can be shifted in a distal direction relative to the casing. 18. The injection device according to claim 17, wherein the casing is in a threaded engagement with the receptacle. 19. The injection device according to claim 17, wherein the casing comprises at least one projection arranged on its outer circumference, the projection being wing-shaped and having a narrow portion extending axially relative to the injection device. 20. The injection device according to claim 17, wherein the plunger rod further comprises an injection button, and wherein prior to movement of the casing into the outer sleeve, the injection button is recessed in the casing, and at least during a portion of the movement of the casing into the outer sleeve, the injection button protrudes proximally out of the casing.