CARTRIDGE INTERFACE ASSEMBLY
3 Assignments
0 Petitions
Accused Products
Abstract
A cartridge interface assembly (80) characterised by a driving plunger (82) including an outer shaft (84), and a driver (86) including an inner shaft (88) movable telescopically with respect to the outer shaft (84), wherein rotation of the driver (86) causes the driving plunger (82) to advance in a direction away from the driver (86), and wherein the cartridge interface assembly (80) is inserted in a cartridge (22) in which a plunger (24) is slidingly disposed, and rotation of the driver (86) causes the driving plunger (82) to advance distally in the cartridge (22) until abutting against the plunger (24).
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Citations
22 Claims
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1-13. -13. (canceled)
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14. A combination cartridge and cartridge interface assembly comprising:
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a rotationally immobile cartridge (22) having an inner cylindrical surface, a first stopper (24) slidingly inserted in the cartridge (22), a distal end and a substance therein for administration to a subject; a cartridge interface assembly (80) comprising; a driving plunger (82) comprising a first shaft (84); a driver (86) comprising a second shaft (88), said second shaft (88) mating with said first shaft (84), so that said shafts are movable telescopically with respect to one another, wherein rotation of said driver (86) causes said driving plunger (82) to linearly advance in a direction away from said driver (86), the arrangement being such that on insertion of the cartridge interface assembly (80) in the rotationally immobile cartridge (22), the driving plunger (82) is in complementary anti-rotation friction relation with the inner cylindrical surface, said complementary anti-rotation friction relation being the only force impeding rotation of the driving plunger (82) with respect to the cartridge (22) such that rotation of said driver (86) causes said driving plunger (82) to linearly advance only towards the distal end until the driving plunger (82) abuts against the stopper (24) whereupon the driving plunger (82) urges the stopper (24) towards the distal end for metering substance from the cartridge; and a locking assembly that permits said driver (86) to rotate in a first rotational direction and blocks rotation of said driver (86) in a second rotational direction opposite to the first rotational direction. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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21. A cartridge interface assembly (100):
a rotatable driver (86) linkable to a stopper (24) slidingly disposed in a cartridge (22) for advancing said stopper (24) distally in said cartridge for dispensing a substance from said cartridge (22) and characterized by a locking assembly that permits said driver (86) to rotate in a first rotational direction and blocks rotation of said driver (86) in a second rotational direction opposite to the first rotational direction. - View Dependent Claims (22)
Specification