US4311050A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reservoir for medicaments
Assignee: University of Southern California
•
Filing: 1980-10-08
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Granted: 1982-01-19
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Expires: 2000-10-08
Abstract
Abstract A reservoir for a pharmacologic delivery system wherein liquid level changes are readable visually to an accuracy of within five microliters. The reservoir is formed as a spirally coiled tubular member disposed between a pair of plate members spaced apart by one or more concentric rims. The tubular member forms a continuous spiral coil between the plate members, one tube end porting through one of the plates at the center thereof and the other tube end porting at the plate circumference. Transparent materials of construction are employed, as appropriate, and one of the plate members may have indicia thereon for assisting the viewer to measure volume changes inside the reservoir.
Inventors
- 👤 Samuel P. Bessman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:38
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/14; A61M5/1412; G; G01; G01F; G01F19/00; G01F23/00; G01F23/02
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
127 words
A reservoir for a liquid medicament adapted to visual indication of microliter changes in medicament volume which comprises: a pair of generally circular plate members, at least one of which is transparent; a spirally coiled, transparent, medicament holding tubular member disposed in a planar configuration between said plate members, one end of said tubular member porting in a center opening in one of said plate members and the other end of said tubular member porting at the circumference of said plate members; means disposed on one of said ends of said tubular member and adapted for attachment to liqud withdrawal means, and indicia on said transparent plate member, said indicia arranged to provide a measure of medicament volume change within the reservoir as medicament is drawn therefrom.
Claim 2
Dependent Claim
127 words
A reservoir for a liquid medicament adapted to visual indication of microliter changes in medicament volume which comprises: a pair of generally circular plate members, at least one of which is transparent; a spirally coiled, transparent, medicament holding tubular member disposed in a planar configuration between said plate members, one end of said tubular member porting in a center opening in one of said plate members and the other end of said tubular member porting at the circumference of said plate members; means disposed on one of said ends of said tubular member and adapted for attachment to liqud withdrawal means, and indicia on said transparent plate member, said indicia arranged to provide a measure of medicament volume change within the reservoir as medicament is drawn therefrom.
Claim 3
Dependent Claim
21 words
The reservoir of claim 1 wherein said indicia comprise a multiplicity of radial lines dividing the circular plate area into subquadrants.
Claim 4
Dependent Claim
13 words
The reservoir of claim 1 wherein one of said plate members is transparent.
Claim 5
Dependent Claim
30 words
The reservoir of claim 1 wherein one of said members includes an upstanding nipple disposed at the center opening thereof and communicating with said one end of said tubular member.
Claim 6
Dependent Claim
26 words
The reservoir of claim 1 wherein said indicia comprise a plurality of radially scribed line segments arranged spirally and superposed over said spirally coiled tubular member.
Claim 7
Dependent Claim
23 words
The reservoir of claim 5 wherein the arcuate distance between adjacent line segments is selected to provide a readout in standard volume units.
Claim 8
Dependent Claim
145 words
A reservoir for a liqud medicament adapted to visual indication of microliter changes in medicament volume which comprises: a pair of generally circular plate members, at least one of which is transparent, the mating sides of said plate members defining a continuous spiral tubular member formed by a continuous spiral hemispherical groove and a continuous spiral wall beginning at the center and terminating at the circumferential wall, one end of said tubular member porting in a center opening in one of said plate members and the other end of said tubular member porting at the circumference of said plate members; means disposed on one of said ends of said tubular member and adapted for attachment to liquid withdrawal means, and indicia on said transparent plate member, said indica arranged to provide a measure of medicament volume change within the reservoir as medicament is drawn therefrom.
Claim 9
Dependent Claim
145 words
A reservoir for a liqud medicament adapted to visual indication of microliter changes in medicament volume which comprises: a pair of generally circular plate members, at least one of which is transparent, the mating sides of said plate members defining a continuous spiral tubular member formed by a continuous spiral hemispherical groove and a continuous spiral wall beginning at the center and terminating at the circumferential wall, one end of said tubular member porting in a center opening in one of said plate members and the other end of said tubular member porting at the circumference of said plate members; means disposed on one of said ends of said tubular member and adapted for attachment to liquid withdrawal means, and indicia on said transparent plate member, said indica arranged to provide a measure of medicament volume change within the reservoir as medicament is drawn therefrom.
Claim 10
Dependent Claim
13 words
The reservoir of claim 7 wherein one of said plate members is transparent.
Claim 11
Dependent Claim
31 words
The reservoir of claim 7 wherein one of said plate members includes an upstanding nipple disposed at the center opening thereof and communicating with said one end of said tubular member.
Claim 12
Dependent Claim
24 words
The reservoir of claim 7 wherein said indicia comprise a plurality of radially scribed line segments arranged spirally and superposed over said spiral groove.
Claim 13
Dependent Claim
23 words
The reservoir of claim 10 wherein the arcuate distance between adjacent line segments is selected to provide a readout in standard volume units.
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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) | 1985-01-18 | 1985-07-20 | 1986-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-01-18 | 1989-07-20 | 1990-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-01-18 | 1993-07-20 | 1994-01-19 | $7700.00 | Window Closed / Lapsed |