US4929233A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Implantable fluid imbibing pump with improved closure
Assignee: Alza Corp
•
Filing: 1988-08-26
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Granted: 1990-05-29
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Expires: 2008-08-26
Abstract
Abstract An improved imbibing agent dispenser having a snap-on closure which is highly reliable, is simple to assemble on one end of the agent dispenser, and can be made at minimum expense without requiring heat or an adhesive to bond the closure to the dispenser. The closure is held in place on the dispenser by a locking feature formed by a shoulder on the end of the dispenser and a ledge on an outer, annular wall of the closure, the ledge being removably hooked beneath and biased toward the shoulder to releasably lock the closure to the dispenser. An important aspect of this closure is that the design provides for the complete containment of a solute component within the dispenser.
Inventors
- 👤 Nathan Roth
- 👤 Su I. Yum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:40
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/0002; A61K9/0004; A61M; A61M5/00; A61M5/14; A61M5/142; A61M5/145; A61M5/148; A61M5/1483
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
143 words
In an osmotically driven agent dispenser including an inner flexible bag adapted to contain the agent and having an open end, an intermediate layer of an osmotically effective solute composition at least partly encapsulating the bag, an outer shape-retaining membrane encapsulating the layer of osmotically effective solute composition, said membrane being at least in part permeable to water, and a port that extends from the interior of the bag to the exterior of the dispenser through which the agent may be charged into the bag and dispensed from the bag, the improvement comprising a locking snap-on closure for closing the open end of the bag, the closure having a biasing member for sealingly engaging the open end of the bag and a locking means preventing removal of the closure when the closure is in sealing engagement with the open end of the bag.
Claim 2
Dependent Claim
143 words
In an osmotically driven agent dispenser including an inner flexible bag adapted to contain the agent and having an open end, an intermediate layer of an osmotically effective solute composition at least partly encapsulating the bag, an outer shape-retaining membrane encapsulating the layer of osmotically effective solute composition, said membrane being at least in part permeable to water, and a port that extends from the interior of the bag to the exterior of the dispenser through which the agent may be charged into the bag and dispensed from the bag, the improvement comprising a locking snap-on closure for closing the open end of the bag, the closure having a biasing member for sealingly engaging the open end of the bag and a locking means preventing removal of the closure when the closure is in sealing engagement with the open end of the bag.
Claim 3
Dependent Claim
15 words
The agent dispenser as set forth in claim 1, wherein the agent is a fluid.
Claim 4
Dependent Claim
35 words
The agent dispenser as set forth in claim 1, wherein the closure comprises two biasing members for receiving the open end of the bag therebetween, the biasing members being resilient and biased toward one another.
Claim 5
Dependent Claim
47 words
The agent dispenser as set forth in claim 1, wherein the locking means comprises a ledge on the biasing member, the ledge adapted for underlying a shoulder on the outer shape-retaining membrane when the open end of the bag is placed in sealing relation with the closure.
Claim 6
Dependent Claim
54 words
The agent dispenser as set forth in claim 1, wherein the closure includes an inner biasing member and an outer biasing member, the inner biasing member including a wall having a central recess therein, the closure further including a plug receivable in the central recess and biasing the wall toward the outer biasing member.
Claim 7
Dependent Claim
18 words
The agent dispenser as set forth in claim 5, wherein the plug is comprised of a resilient material.
Claim 8
Dependent Claim
31 words
The agent dispenser as set forth in claim 5, wherein the wall has a taper, the outer surface of the plug being tapered and complemental to the taper of the wall.
Claim 9
Dependent Claim
46 words
The agent dispenser as set forth in claim 5, including a web on the inner biasing member for defining an inner boundary of the central recess, the web being integral with the wall, the agent charging and dispensing port extending through the web and the plug.
Claim 10
Dependent Claim
22 words
The agent dispenser as set forth in claim 6, wherein the plug has an outer surface provided with additional locking means thereon.
Claim 11
Dependent Claim
21 words
The agent dispenser as set forth in claim 9, wherein the additional locking means includes a plurality of spaced annular ribs.
Claim 12
Dependent Claim
17 words
The agent dispenser as set forth in claim 10, wherein each rib has a convex outer surface.
Claim 13
Dependent Claim
18 words
The agent dispenser as set forth in claim 10, wherein each rib has a sawtooth transverse cross section.
Claim 14
Dependent Claim
23 words
The agent dispenser as set forth in claim 5, wherein the closure includes a resilient flange connecting the inner and outer biasing members.
Claim 15
Dependent Claim
143 words
In an osmotically driven fluid dispenser comprising an inner flexible bag adapted to contain the fluid, an intermediate layer of an osmotically effective solute composition at least partly encapsulating the bag, an outer, generally rigid membrane casing encapsulating the layer of osmotically effective solute composition, said membrane being at least in part permeable to water, and a port that extends from the interior of the bag to the exterior of the dispenser through which the fluid may be charged into the bag and dispensed from the bag, the improvement comprising a snap-on closure for closing the open end of the bag, the closure having inner and outer biasing members for receiving and sealing the open end of the bag therebetween and a locking means preventing removal of the closure when the closure is in sealing engagement with the open end of the bag.
Claim 16
Dependent Claim
143 words
In an osmotically driven fluid dispenser comprising an inner flexible bag adapted to contain the fluid, an intermediate layer of an osmotically effective solute composition at least partly encapsulating the bag, an outer, generally rigid membrane casing encapsulating the layer of osmotically effective solute composition, said membrane being at least in part permeable to water, and a port that extends from the interior of the bag to the exterior of the dispenser through which the fluid may be charged into the bag and dispensed from the bag, the improvement comprising a snap-on closure for closing the open end of the bag, the closure having inner and outer biasing members for receiving and sealing the open end of the bag therebetween and a locking means preventing removal of the closure when the closure is in sealing engagement with the open end of the bag.
Claim 17
Dependent Claim
31 words
The fluid dispenser as set forth in claim 14, wherein the inner and outer biasing members have a space therebetween for receiving the open ends of the bag and the membrane.
Claim 18
Dependent Claim
20 words
The fluid dispenser as set forth in claim 14, wherein the members are resilient and are biased toward each other.
Claim 19
Dependent Claim
41 words
The fluid dispenser as set forth in claim 14, wherein the locking means comprises a ledge on one of the biasing members and a shoulder on the membrane casing, said ledge engaging the shoulder to lock the closure onto the casing.
Claim 20
Dependent Claim
44 words
The fluid dispenser as set forth in claim 14, wherein the inner biasing member includes a wall having a central recess therein, the closure further including a plug receivable in the central recess and biasing the inner wall outwardly toward the outer biasing member.
Claim 21
Dependent Claim
18 words
The fluid dispenser as set forth in claim 18, wherein the plug is comprised of a resilient material.
Claim 22
Dependent Claim
31 words
The fluid dispenser as set forth in claim 18, wherein the wall has a taper, the outer surface of the plug being tapered and complemental to the taper of the wall.
Claim 23
Dependent Claim
40 words
The fluid dispenser as set forth in claim 18, including a web for defining an inner boundary of the central recess, the web being integral with the wall, the charging and dispensing port extending through the web and the plug.
Claim 24
Dependent Claim
22 words
The fluid dispenser as set forth in claim 19, wherein the plug has an outer surface provided with additional locking means thereon.
Claim 25
Dependent Claim
21 words
The fluid dispenser as set forth in claim 22, wherein the additional locking means includes a plurality of spaced annular ribs.
Claim 26
Dependent Claim
17 words
The fluid dispenser as set forth in claim 23, wherein each rib has a convex outer surface.
Claim 27
Dependent Claim
17 words
The fluid dispenser as set forth in claim 23, wherein each rib has a sawtooth cross section.
Claim 28
Dependent Claim
23 words
The fluid dispenser as set forth in claim 14, wherein the closure includes a resilient flange connecting the inner and outer biasing members.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-05-28 | 1993-11-27 | 1994-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-28 | 1997-11-27 | 1998-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-28 | 2001-11-27 | 2002-05-29 | $7700.00 | Window Closed / Lapsed |