Osmotic system for delivery of fluid-sensitive somatotropins to bovine animals
First Claim
1. In a delivery device for storing and protecting a beneficial agent formulation and for dispensing the beneficial agent formulation to an animal, the delivery device havinga housing comprising a fluid impermeable portion and a fluid permeable portion forming an internal compartment;
- a beneficial agent formulation in the internal compartment;
an expandable driver in the compartment for pushing the beneficial agent formulation from the delivery device;
a partition substantially impermeable to fluid, the partition disposed between the beneficial agent formulation and the expandable driver;
and exit passageway in the housing for delivering the beneficial agent formulation from the internal compartment to the animal over a prolonged period of time improvement comprising;
the partition including a body portion and a biased skirt for slidably engaging the housing portions, the biased skirt being biased radially outward from the body portion to slidably engage the housing, wherein the partition includes a conical skirt extending obliquely outward from the body portion to be biased radially outward from the body portion while slidably engaging with the housing.
1 Assignment
0 Petitions
Accused Products
Abstract
A delivery system is disclosed for delivering a fluid-sensitive beneficial agent such as a somatotropin, or an analogue or derivative thereof, to an animal such as a bovine. The delivery system comprises a wall that surrounds an internal compartment, said wall comprising a first wall section that limits the passage of fluid into the system and a second wall section that permits the passage of fluid into the system. The wall may further comprise an end cap which may include means for adapting the end cap for ultrasonic welding to the first wall section and means for maintaining the beneficial agent in contact with exit means. The compartment comprises a beneficial agent and an expandable means. The delivery system comprises exit means for delivering the beneficial agent to the animal. The exit means may include means for compensating for slight variations in the efflux rate of the beneficial agent and means for maintaining for a sufficient velocity or efflux rate of beneficial agent outward from the device while minimizing diffusion of fluids from the external environment back into the device.
116 Citations
18 Claims
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1. In a delivery device for storing and protecting a beneficial agent formulation and for dispensing the beneficial agent formulation to an animal, the delivery device having
a housing comprising a fluid impermeable portion and a fluid permeable portion forming an internal compartment; -
a beneficial agent formulation in the internal compartment; an expandable driver in the compartment for pushing the beneficial agent formulation from the delivery device; a partition substantially impermeable to fluid, the partition disposed between the beneficial agent formulation and the expandable driver; and exit passageway in the housing for delivering the beneficial agent formulation from the internal compartment to the animal over a prolonged period of time improvement comprising; the partition including a body portion and a biased skirt for slidably engaging the housing portions, the biased skirt being biased radially outward from the body portion to slidably engage the housing, wherein the partition includes a conical skirt extending obliquely outward from the body portion to be biased radially outward from the body portion while slidably engaging with the housing.
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2. A delivery device for storing and protecting a beneficial agent formulation and for dispensing the beneficial agent formulation to an animal, the delivery device having:
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a housing comprising a fluid impermeable portion, and a fluid permeable portion, the portions forming an internal compartment; a beneficial agent formulation in the internal compartment; an expandable driver in the compartment for pushing the beneficial agent formulation from the delivery device; a partition layer substantially impermeable to fluid between the beneficial agent formulation and the expandable driver, wherein the partition layer includes a body portion and biasing means for slidably engaging the first wall section, the body portion adapted to be slidably received within the first wall section and the biasing means having a portion separated from and overlapping the body portion to slidably engage the first wall section, wherein the biasing means includes a conical skirt extending obliquely outward from the body portion to be biased radially outward from the body portion while slidably engaging with the housing; and an exit passageway for delivering the beneficial agent formulation from the internal compartment to the animal over a prolonged period of time, the improvement comprising headspace spaced away from the exit passageway for accumulating an air volume within the portion of the internal compartment containing the beneficial agent formulation at a location away from the exit passageway.
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3. A delivery device for storing and protecting a beneficial agent formulation and for dispensing the beneficial agent formulation to an animal, the delivery device having:
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a housing comprising a fluid impermeable portion and a fluid permeable portion, the portions forming an internal compartment; a beneficial agent formulation in the internal compartment; an expandable driver in the compartment for pushing the beneficial agent formulation from the delivery device; and an exit passageway for delivering the beneficial agent formulation from the internal compartment to the animal over a prolonged period of time, the improvement comprising headspace for accumulating an air volume within the internal compartment, and further comprising a partition layer substantially impermeable to fluid between the beneficial agent formulation and the expandable means, wherein the partition layer includes a body portion and biasing means for slidably engaging the first wall section, the body portion adapted to be slidably received within the first wall section and the biasing means having a portion separated from and overlapping the body portion to slidably engage the first wall section, wherein the biasing means includes a conical skirt extending obliquely outward from the body portion to be biased radially outward from the body portion while slidably engaging with the housing, wherein the conical skirt separates from and overlaps the body portion while slidably engaging with the fluid impermeable portion. - View Dependent Claims (4, 5, 6, 7)
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8. In a delivery device for storing and protecting a beneficial agent formulation and for dispensing the beneficial agent formulation to an animal, the delivery device having:
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a housing comprising a fluid impermeable portion and a fluid permeable portion, the portions forming an internal compartment; a beneficial agent formulation in the internal compartment; an expandable driver in the compartment for pushing the beneficial agent formulation from the delivery device; and an exit passageway for delivering the beneficial agent formulation from the internal compartment to the animal over a prolonged period of time, the improvement comprising headspace for accumulating an air volume within the internal compartment, wherein the fluid impermeable portion comprises a first wall section, and the fluid permeable portion comprises a second wall section, a portion of the second wall sized to be telescopically received within a portion of the first wall section the wall sections defining an adhesive receiving space containing an adhesive therebetween. - View Dependent Claims (9)
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10. In a delivery device for storing and protecting a beneficial agent formulation and for dispensing the beneficial agent formulation to an animal, the delivery device having:
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a housing comprising a fluid impermeable wall section and a fluid permeable portion forming an internal compartment; a joint for joining the fluid impermeable portion to the fluid permeable portion; a beneficial agent formulation in the internal compartment; expandable driver in the compartment adjacent the fluid permeable portion for pushing the beneficial agent formulation from the delivery device; and exit means in the fluid impermeable section for delivering the beneficial agent formulation from the delivery device to the animal over a prolonged period of time, the improvement comprising; the fluid permeable portion and the fluid impermeable portion defining an adhesive receiving space containing an adhesive therebetween; and a joint for joining the fluid impermeable portion to the fluid permeable portion, the joint providing a smooth transition from the fluid impermeable portion to the fluid permeable portion. - View Dependent Claims (11, 12, 13)
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14. A delivery device for storing and protecting a beneficial agent formulation and for dispensing the beneficial agent formulation to an animal, the delivery device comprising:
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a) a housing comprising a first wall section, a second wall section, and an end cap, the first wall section, the second wall section and the end cap assembled together to form an internal compartment, wherein the first wall section and the end cap are substantially impermeable to the passage of fluid and, wherein the second wall section is permeable in at least a portion to the passage of fluid; b) means for abutting the first wall section with the second wall section; c) a beneficial agent formulation in a portion of the internal compartment comprised by the first wall section and the end cap; d) expandable means in a portion of the compartment comprised by the second wall section for pushing the beneficial agent formulation from the delivery device; e) a partition layer substantially impermeable to fluid, the partition layer between the beneficial agent formulation and the expandable means, wherein the partition layer includes a body portion and a conical skirt extending obliquely outward from the body portion to be biased radially outward from the body portion while slidably engaging the first wall section; and f) exit means in the end cap for delivering the beneficial agent formulation from the delivery device to the animal. - View Dependent Claims (15, 16, 17, 18)
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Specification