Patent US4137916A successfully refreshed from Google Patents.
US4137916A
Expired / Lapsed
US
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Catheter plug assembly
Assignee: Baxter International Inc
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Filing: 1976-11-22
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Granted: 1979-02-06
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Expires: 1996-11-22
Abstract
Abstract An obturator plug is provided with a thin circumferential deformable sealing skirt integrally formed on and protruding from the plug, engaging the inwardly facing wall of a female catheter fitting to form an improved obturator-catheter assembly having a catheter secured to its proximal end in a female catheter fitting and receiving an obturator having a shaft secured to a plug, the obturator plug including locking means engaging a predetermined portion of the female catheter fitting to lock the plug to the fitting after a specific degree of insertion of the plug into the fitting.
Inventors
- 👤 Don M. Killman
- 👤 Thomas P. Robinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:25
CPC Classifications
A; A61; A61M; A61M39/00; A61M39/20
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
142 words
In an obturator comprising a forwardly tapered male plug with a shaft extending from the forward end thereof, said plug including locking means for releasable engagement with projecting dogs on a catheter fitting having an inwardly tapered smooth female portion upon insertion of the obturator into the catheter fitting, the improvement comprising: a relatively thin resilient sealing skirt integrally formed about the circumference of the plug substantially flush with the forward end thereof, said sealing skirt tapering radially outwardly at an acute angle to the longitudinal axis of said shaft to provide sealing engagement with the inside circumference of the female portion of said catheter fitting despite minor dimensional variations in manufacturing said plug and catheter fitting which could otherwise prevent suitable sealing engagement when the locking means of the male plug is engaged with the projecting dogs of the catheter fitting.
Claim 2
Dependent Claim
142 words
In an obturator comprising a forwardly tapered male plug with a shaft extending from the forward end thereof, said plug including locking means for releasable engagement with projecting dogs on a catheter fitting having an inwardly tapered smooth female portion upon insertion of the obturator into the catheter fitting, the improvement comprising: a relatively thin resilient sealing skirt integrally formed about the circumference of the plug substantially flush with the forward end thereof, said sealing skirt tapering radially outwardly at an acute angle to the longitudinal axis of said shaft to provide sealing engagement with the inside circumference of the female portion of said catheter fitting despite minor dimensional variations in manufacturing said plug and catheter fitting which could otherwise prevent suitable sealing engagement when the locking means of the male plug is engaged with the projecting dogs of the catheter fitting.
Claim 3
Dependent Claim
34 words
The improvement of claim 1 wherein said sealing skirt diverges radially outwardly from the remaining portion of said plug at an angle of approximately 20 degrees to the longitudinal axis of said obturator shaft.
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) | 1982-02-05 | 1982-08-07 | 1983-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-05 | 1986-08-07 | 1987-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-05 | 1990-08-07 | 1991-02-06 | $7700.00 | Window Closed / Lapsed |