US4257422A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surgical drain
Assignee: 3M Co
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Filing: 1979-03-14
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Granted: 1981-03-24
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Expires: 1999-03-14
Abstract
Abstract The surgical drain tube of the present invention is comprised of a tubular member of a flexible pliable material. The tubular member has a oval exterior surface and a collapsible wall which defines a lumen which is normally of a substantially oval cross section. A tongue member is integrally formed with the inner surface of the top wall portion of the tubular member and extends the longitudinal length of the lumen. Oppositely deposed from the tongue member is a groove member which is formed integrally with the inner surface of the bottom wall portion of the tubular member and also extends the length of the passageway.
Inventors
- 👤 Patricia E. Duncan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:28
CPC Classifications
A; A61; A61M; A61M27/00; A61M25/00; A61M25/0021; A61M25/0023; A61M2025/0025
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
171 words
A surgical drain tube defined by a tubular member of a flexible and pliable material, said tubular member comprising a top wall portion, a bottom wall portion and side wall portions defining a lumen which is normally substantially oval in cross-section with said wall portions having an inner and outer surface, wherein said top wall portion has at least one tongue portion on the inner surface of said top wall portion extending substantially the length of said lumen and said bottom wall portion has at least one groove member on the inner surface of said bottom wall portion extending substantially the length of said lumen, said groove member disposed opposite said tongue member such that when a change in pressure occurs causing said lumen to collapse said tongue member releasibly seats in said groove member thereby forming a plurality of laterally disposed lumens, and wherein said side wall portions are thicker in cross-section than the thinnest region of said top wall portion and the thinnest region of said bottom wall portion.
Claim 2
Dependent Claim
171 words
A surgical drain tube defined by a tubular member of a flexible and pliable material, said tubular member comprising a top wall portion, a bottom wall portion and side wall portions defining a lumen which is normally substantially oval in cross-section with said wall portions having an inner and outer surface, wherein said top wall portion has at least one tongue portion on the inner surface of said top wall portion extending substantially the length of said lumen and said bottom wall portion has at least one groove member on the inner surface of said bottom wall portion extending substantially the length of said lumen, said groove member disposed opposite said tongue member such that when a change in pressure occurs causing said lumen to collapse said tongue member releasibly seats in said groove member thereby forming a plurality of laterally disposed lumens, and wherein said side wall portions are thicker in cross-section than the thinnest region of said top wall portion and the thinnest region of said bottom wall portion.
Claim 3
Dependent Claim
167 words
A surgical drain tube defined by a tubular member of a flexible and pliable material, said tubular member comprising a top wall portion, a bottom wall portion and side wall portions defining a lumen which is normally substantially oval in cross-section, said wall portions having an inner and outer surface, wherein said side wall portions are thicker in cross-sectional thickness than said top wall portion and said bottom wall portion, and wherein said top wall portion has at least one tongue member attached to the inner surface of said top wall portion and extending substantially the length of said lumen and said bottom wall portion has at least one groove member attached to the inner surface of said bottom wall portion and extending substantially the length of said lumen, said groove member disposed opposite said tongue member such that when a change in pressure occurs causing said lumen to collapse said tongue member releasibly seats in said groove member thereby forming a plurality of laterally disposed lumens.
Claim 4
Dependent Claim
167 words
A surgical drain tube defined by a tubular member of a flexible and pliable material, said tubular member comprising a top wall portion, a bottom wall portion and side wall portions defining a lumen which is normally substantially oval in cross-section, said wall portions having an inner and outer surface, wherein said side wall portions are thicker in cross-sectional thickness than said top wall portion and said bottom wall portion, and wherein said top wall portion has at least one tongue member attached to the inner surface of said top wall portion and extending substantially the length of said lumen and said bottom wall portion has at least one groove member attached to the inner surface of said bottom wall portion and extending substantially the length of said lumen, said groove member disposed opposite said tongue member such that when a change in pressure occurs causing said lumen to collapse said tongue member releasibly seats in said groove member thereby forming a plurality of laterally disposed lumens.
Claim 5
Dependent Claim
27 words
The surgical drain of claim 2 wherein the corner edges of the portions said groove member and said tongue member which project into said passageway are rounded.
References Cited (Backward Citations)
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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) | 1984-03-23 | 1984-09-22 | 1985-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-23 | 1988-09-22 | 1989-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-23 | 1992-09-22 | 1993-03-24 | $7700.00 | Window Closed / Lapsed |