Claims
- 1. An insert for use in combination with a ruminal drug delivery device having a semipermeable cup defining a compartment, an osmotic expandable driving member, a drug formulation containing a drug to be dispensed, a density element, and exit means for fluidly connecting the drug formulation with the environment of use, the insert being essentially gas-impermeable and being sized and shaped to be placed between a density element and the drug formulation.
- 2. An insert as set forth in claim 1, wherein the insert is retained within the compartment and the density element retained within the insert.
- 3. An insert according to claim 1 which comprises a material selected from the group consisting of polyvinyl alcohol, polypropylene, cellulose, cellulose esters, acetyl resins, fluorocarbon polymers, polyamides, polyesters, polyolefins, nylon, and noncorrosive metals.
- 4. An insert according to claim 1, which further comprises venting means.
- 5. An insert according to claim wherein the venting means is selected from the group consisting of one or more protrusions, one or more grooves, one or more bores, and combinations thereof.
- 6. An insert according to claim 1, which further comprises an exit port screen.
- 7. An insert according to claim 1 which further comprises a loading dose chamber and a loading dose.
CROSS-REFERENCE TO COPENDING APPLICATIONS
This application is a divisional of application Ser. No. 08/743,807, filed Nov. 5, 1996 now U.S. Pat. No. 5,824,340, which is a division of Ser. No. 08/475,916 filed Jun. 7, 1995 now U.S. Pat. No. 5,639,419.
US Referenced Citations (10)
Foreign Referenced Citations (1)
Number |
Date |
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WO9011856 |
Oct 1990 |
WOX |
Divisions (2)
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Number |
Date |
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Parent |
743807 |
Nov 1996 |
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Parent |
475916 |
Jun 1995 |
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Continuation in Parts (1)
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081743 |
Jun 1993 |
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