Linear Rotation Stabilizer For A Telescoping Syringe Stopper Driverdriving Assembly
First Claim
1. An assembly for driving a stopper in a drug reservoir of a drug delivery device comprising:
- a telescoping assembly that telescopes by relative rotation between at least a proximal shaft and a distal shaft oriented along and axis of said reservoir;
said distal shaft configured to engage the stopper of the drug reservoir;
an anti-rotational guide sized to move along said axis of the reservoir;
said anti-rotational guide slidably and anti-rotationally coupled to a housing of the drug delivery device; and
a coupling slidably and anti-rotationally linking said anti-rotational guide to said distal shaft;
said sliding and anti-rotation with respect to said axis of the reservoir such that rotating said proximal shaft with respect to said anti-rotational guide moves said distal shaft along said axis and moves said distal shaft with respect to said anti-rotational guide said anti-rotational guide also moving along said axis.
3 Assignments
0 Petitions
Accused Products
Abstract
A cartridge interface assembly drives a stopper in a drug reservoir or a drug delivery device. An anti-rotational guide optionally moves along an axis of a cavity of the reservoir. The anti-rotational guide is optionally slidably anti-rotationally coupled to a housing of the drug delivery device. A telescoping plunger driver may include a proximal shaft and distal shaft that telescope by relative rotation. The distal shaft is optionally slidably anti-rotationally coupled to the anti-rotational guide. The shafts are optionally oriented along said axis. In some embodiments, rotating the proximal shaft with respect to the anti-rotational guide moves the guide along said axis with respect to the housing and moves the distal shaft along the axis with respect to the anti-rotational guide.
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Citations
20 Claims
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1. An assembly for driving a stopper in a drug reservoir of a drug delivery device comprising:
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a telescoping assembly that telescopes by relative rotation between at least a proximal shaft and a distal shaft oriented along and axis of said reservoir;
said distal shaft configured to engage the stopper of the drug reservoir;an anti-rotational guide sized to move along said axis of the reservoir;
said anti-rotational guide slidably and anti-rotationally coupled to a housing of the drug delivery device; anda coupling slidably and anti-rotationally linking said anti-rotational guide to said distal shaft;
said sliding and anti-rotation with respect to said axis of the reservoir such that rotating said proximal shaft with respect to said anti-rotational guide moves said distal shaft along said axis and moves said distal shaft with respect to said anti-rotational guide said anti-rotational guide also moving along said axis. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of supplying a drug to a delivery device comprising:
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providing a reservoir containing a drug and sealed with a stopper and a telescoping assembly that telescopes by rotating a proximal shaft with respect to a distal shaft;
said distal shaft configured to engage the stopper;slidably and anti-rotationally engaging an anti-rotational guide to a housing of the delivery device; preventing rotation of said distal shaft with respect to said housing by slidably guiding said distal shaft along said anti-rotational guide, and extending said distal shaft and said anti-rotational guide linearly inside a cavity of said reservoir toward a distal end of said reservoir by rotating said proximal shaft wherein a distance of said extending of said distal shaft is greater than a distance of said extending of the anti-rotational guide. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification