US3703899A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surgical drainage instrument
Assignee: Individual
•
Filing: 1971-01-28
•
Granted: 1972-11-28
•
Expires: 1991-01-28
Abstract
Abstract A trocar is slidably mounted in a main tube and normally is disposed at its front end. Connected to the rear end of the trocar is a rod that extends back through the tube and out of its rear end. A tubular bellows encircles the rod and has a front end sealed to the trocar, while the rear end of the bellows is sealingly connected to the rear end of the tube. After the tube is inserted in an incision the trocar is pulled back into a position near the rear end of the tube. Directly in front of this rear portion the tube is provided with a lateral outlet opening and a discharge tube so that drainage can occur back through the two tubes.
Inventors
- 👤 Teodora A Calinog
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:08
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/01; A61M25/06; A61M25/0606; A61M1/00; A61M1/84
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
182 words
A surgical drainage instrument comprising a main tube having front and rear ends, a trocar slidably mounted in the tube and normally disposed in the front end thereof, a rod in the tube connected to the rear end of the trocar and extending therefrom back through the tube and out of its rear end, the diameter of the rod being considerably less than the inner diameter of the tube, a tubular bellows encircling the rod inside the tube and having a front end sealed to the trocar, means sealingly connecting the rear end of the bellows to the rear end of the tube to isolate the rod from the inside of the tube around and in front of the bellows, said rod being designed for pulling the trocar rearwardly in the tube to a position near the rear end of the tube, the tube being provided with a lateral outlet opening near its rear end between the front and rear positions of the trocar, and a discharge tube joined to the main tube around said opening and extending outwardly away from it.
Claim 2
Dependent Claim
182 words
A surgical drainage instrument comprising a main tube having front and rear ends, a trocar slidably mounted in the tube and normally disposed in the front end thereof, a rod in the tube connected to the rear end of the trocar and extending therefrom back through the tube and out of its rear end, the diameter of the rod being considerably less than the inner diameter of the tube, a tubular bellows encircling the rod inside the tube and having a front end sealed to the trocar, means sealingly connecting the rear end of the bellows to the rear end of the tube to isolate the rod from the inside of the tube around and in front of the bellows, said rod being designed for pulling the trocar rearwardly in the tube to a position near the rear end of the tube, the tube being provided with a lateral outlet opening near its rear end between the front and rear positions of the trocar, and a discharge tube joined to the main tube around said opening and extending outwardly away from it.
Claim 3
Dependent Claim
78 words
A surgical drainage instrument according to claim 1, in which said trocar is provided in its side with a drain groove extending from end to end, and the front end of the main tube is provided with a lip engaged by the trocar and closing the front end of the groove and with a side opening beside said groove, whereby fluid entering said side opening can pass the trocar and leave said main tube through said discharge tube.
Claim 4
Dependent Claim
53 words
A surgical drainage instrument according to claim 1, in which said connecting means includes a plug fitting tightly in the rear end of the main tube and provided with an axial passage for said rod, the rear end of said bellows encircling said plug inside the main tube and being compressed between them.
Claim 5
Dependent Claim
25 words
A surgical drainage instrument according to claim 1, in which said rod is detachably connected to the trocar and is completely removable from said tube.
References Cited (Backward Citations)
US954494A
Cited
US1045326A
Cited
US2541542A
Cited
GB1035273A
Cited
US3459189A
Cited
US3592192A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-11-28 | 1976-05-29 | 1976-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-28 | 1980-05-29 | 1980-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-28 | 1984-05-29 | 1984-11-28 | $7700.00 | Window Closed / Lapsed |