Patent US3951145A successfully refreshed from Google Patents.
US3951145A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Intravenous measuring chamber
Assignee: Delmed Inc
•
Filing: 1973-10-25
•
Granted: 1976-04-20
•
Expires: 1993-10-25
Abstract
Abstract An improved measuring chamber for use in an intravenous feeding set is defined by a rigid transparent plastic chamber and includes an injection site formed in a side wall of the chamber. With the injection site in this position, the tendency of dust to collect on the injection site is significantly reduced. Moreover, adding medication to the measuring chamber is easier because the attendant need not reach so high. Finally, if the injection site is located below the liquid level of parenteral fluid in the chamber, homogeneous mixing of the parenteral fluid and the medication added thereto can be accomplished by simply pumping the plunger of the hypodermic syringe used to add the medication to the chamber.
Inventors
- 👤 Bob Lee Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:49
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/14; A61M5/1412
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
167 words
A measuring chamber for use in an intravenous feeding set comprising a rigid chamber having a top and a bottom and side walls connecting said top and bottom; said chamber having a larger cross-sectional area near its top than near its bottom with the side walls of the upper portion of said chamber being substantially vertically oriented and the side walls of said lower portion being substantially vertically oriented; an inlet fluid passageway in said top for placing said chamber in fluid communication with a source of parenteral fluid; an outlet fluid passageway in said bottom for placing said chamber in fluid communication with an intravenous needle; and indicia on said chamber extending from near said bottom to near said top for indicating the amount of fluid in said chamber; said measuring chamber further including an injection site for injecting medication into said chamber below the liquid level of parenteral fluid in said chamber, said injection site being formed in the lower portion of said side walls.
Claim 2
Dependent Claim
167 words
A measuring chamber for use in an intravenous feeding set comprising a rigid chamber having a top and a bottom and side walls connecting said top and bottom; said chamber having a larger cross-sectional area near its top than near its bottom with the side walls of the upper portion of said chamber being substantially vertically oriented and the side walls of said lower portion being substantially vertically oriented; an inlet fluid passageway in said top for placing said chamber in fluid communication with a source of parenteral fluid; an outlet fluid passageway in said bottom for placing said chamber in fluid communication with an intravenous needle; and indicia on said chamber extending from near said bottom to near said top for indicating the amount of fluid in said chamber; said measuring chamber further including an injection site for injecting medication into said chamber below the liquid level of parenteral fluid in said chamber, said injection site being formed in the lower portion of said side walls.
Claim 3
Dependent Claim
21 words
Apparatus according to claim 1 wherein a right cross section of said upper portion is in the form of an oval.
Claim 4
Dependent Claim
21 words
Apparatus according to claim 1 wherein a right cross section of said lower portion is in the form of a circle.
Claim 5
Dependent Claim
38 words
Apparatus according to claim 1 wherein a right cross section of said upper portion is in the form of an oval and wherein a right cross section of said lower portion is in the form of a circle.
Claim 6
Dependent Claim
51 words
Apparatus according to claim 1 wherein said lower portion carries indicia indicating the quantity of parenteral fluid therein in first intervals and further wherein said upper portion carries indicia indicating the quantity of fluid in said measuring chamber in second intervals, with said second intervals being larger than said first intervals.
Claim 7
Dependent Claim
43 words
Apparatus according to claim 1 hwerein said lower portion carries indicia indicating the quantity of parenteral fluid therein in one milliliter intervals and further wherein said upper portion carries indicia indicating the quantity of fluid in said measuring chamber in 5 milliliter intervals.
References Cited (Backward Citations)
US2129983A
Cited
US2489600A
Cited
US2644452A
Cited
US2770234A
Cited
US3001525A
Cited
US3163163A
Cited
US3216418A
Cited
US3216419A
Cited
US3345980A
Cited
US3667464A
Cited
US3776229A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-04-20 | 1979-10-20 | 1980-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-20 | 1983-10-20 | 1984-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-20 | 1987-10-20 | 1988-04-20 | $7700.00 | Window Closed / Lapsed |