US3722697A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Intravenous injection apparatus drip chamber having filter means
Assignee: Burron Medical Products Inc
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Filing: 1970-04-29
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Granted: 1973-03-27
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Expires: 1990-04-29
Abstract
Abstract An intravenous injection apparatus drip chamber comprises a tubular plastic member having a lower wall annular shoulder around said outlet hole. A filter means includes a flat metallic filter having raw outer edges which is disposed within a recess in the bottom of a plastic filter ring. The filter ring has a lower tapered portion which is ultrasonically fused to the annular shoulder on the lower wall of the drip chamber. The filter ring is also bonded to the outer periphery of the metallic filter.
Inventors
- 👤 G Burke
- 👤 K Raines
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:32
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/14; A61M5/165; B; B29; B29C; B29C37/00; B29C37/0078; B29C37/0082; B29C65/00; B29C65/02; B29C65/08; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/13; B29C66/131; B29C66/303; B29C66/3034; B29C66/30341; B29C66/50; B29C66/51; B29C66/53; B29C66/534; B29C66/5342; B29C66/53425; B29C66/5344; B29C66/61; B29C66/612; B29C66/70; B29C66/73; B29C66/739; B29C66/7392; A61M2005/1652; B29C66/71; B29C66/80; B29C66/83; B29C66/832; B29C66/8322; B29K; B29K2105/00; B29K2105/06; B29K2105/20; B29K2105/206; B29K2705/00; B29L; B29L2031/00; B29L2031/14; B29L2031/753; B29L2031/7544
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
131 words
Intravenous injection apparatus including a drip chamber comprising a tubular member having a lower wall in an outlet portion thereof, said lower wall having an outlet hole therethrough and an annular shoulder thereon in surrounding relation to said hole, filter means within said tubular member adjacent said outlet hole, said filter means including a filter ring having an inwardly tapered lower end portion defining a narrow annular edge, said annular edge ultrasonically sealed to said shoulder in surrounding relation to said outlet hole, an annular recess in said tapered lower end adjacent to and radially inwardly of said annular edge, and a flat disc-shaped filter having a raw edge bonded to said filter ring with the raw edge of the filter ultrasonically sealed to said filter ring in said annular recess.
Claim 2
Dependent Claim
131 words
Intravenous injection apparatus including a drip chamber comprising a tubular member having a lower wall in an outlet portion thereof, said lower wall having an outlet hole therethrough and an annular shoulder thereon in surrounding relation to said hole, filter means within said tubular member adjacent said outlet hole, said filter means including a filter ring having an inwardly tapered lower end portion defining a narrow annular edge, said annular edge ultrasonically sealed to said shoulder in surrounding relation to said outlet hole, an annular recess in said tapered lower end adjacent to and radially inwardly of said annular edge, and a flat disc-shaped filter having a raw edge bonded to said filter ring with the raw edge of the filter ultrasonically sealed to said filter ring in said annular recess.
Claim 3
Dependent Claim
23 words
Intravenous injection apparatus as in claim 1, wherein the outer periphery of said filter ring has a snug fit within said drip chamber.
Claim 4
Dependent Claim
19 words
Apparatus as defined in claim 1, wherein said drip chamber and said filter ring are formed of plastic material.
Claim 5
Dependent Claim
14 words
Apparatus as defined in claim 1, wherein said filter is formed of metallic material.
Claim 6
Dependent Claim
20 words
Apparatus as defined in claim 4, wherein said drip chamber and said filter ring are each formed of plastic material.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |