Patent US3771527A successfully refreshed from Google Patents.
US3771527A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surgical drainage tube
Assignee: Individual
•
Filing: 1971-08-16
•
Granted: 1973-11-13
•
Expires: 1991-08-16
Abstract
Abstract A surgical drainage tube comprising inner and outer concentric tubular portions, each having apertures adjacent their distal ends, means connecting the proximal end of the inner tube to a source of suction, and a cap closing off the proximal end of the outer tube with the inner tube extending through said cap, said cap being constructed of a penetratable self-sealing material whereby fluids may be injected through said cap to the annular chamber located between said inner and outer tubes, in order that desired fluids may be introduced to the cavity being drained, while suction is simultaneously taking place.
Inventors
- 👤 J Ruisi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:45
CPC Classifications
A; A61; A61M; A61M1/00; A61M1/84; A61M1/85
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
106 words
A surgical drainage tube comprising an elongated outer tubular portion, an inner tubular portion extending coaxially therein, said inner portion being of substantially less diameter than said outer portion whereby an annular chamber exists therebetween, apertures in said tubular portions adjacent their distal end, means connecting the proximal end of said inner tubular portion to a source of suction, and a penetratable, selfsealing, disc-like cap closing off the proximal end of said annular chamber, the outer surface of said cap being exposed and readily accessible for penetration in order that fluids may be periodically and/or selectively injected under pressure through said cap to said annular chamber.
Claim 2
Dependent Claim
106 words
A surgical drainage tube comprising an elongated outer tubular portion, an inner tubular portion extending coaxially therein, said inner portion being of substantially less diameter than said outer portion whereby an annular chamber exists therebetween, apertures in said tubular portions adjacent their distal end, means connecting the proximal end of said inner tubular portion to a source of suction, and a penetratable, selfsealing, disc-like cap closing off the proximal end of said annular chamber, the outer surface of said cap being exposed and readily accessible for penetration in order that fluids may be periodically and/or selectively injected under pressure through said cap to said annular chamber.
Claim 3
Dependent Claim
27 words
In the drainage tube of claim 1, an inflatable cuff secured to and surrounding the outer surface of said outer tubular portion adjacent the proximal end thereof.
Claim 4
Dependent Claim
56 words
In the drainage tube of claim 1, the proximal end of said tubular portion having a divergent conical portion, whereby the diameter of said cap is larger than the diameter of the distal portion of said outer tubular portion in order to increase the size of said cap and hence facilitate the injection of fluids therethrough.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-12 | 1977-05-14 | 1977-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-12 | 1981-05-14 | 1981-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-12 | 1985-05-14 | 1985-11-13 | $7700.00 | Window Closed / Lapsed |