US5578059A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anti-reflux valve with environmental barrier
Assignee: Smiths Medical ASD Inc
•
Filing: 1995-08-10
•
Granted: 1996-11-26
•
Expires: 2015-08-10
Abstract
Abstract A medical site (10) includes a slit septum environmental barrier (12) held across the inlet opening (76) of housing (16). Site (10) includes a disc anti-reflux valve (14) below the inlet (76) of housing (16).
Inventors
- 👤 Charles R. Patzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:08
CPC Classifications
F; F16; F16L; F16L15/00; F16L15/001; A; A61; A61M; A61M39/00; A61M39/02; A61M39/04; A61M39/045; A61M39/10; A61M39/22; A61M39/24; A61M2039/1072; A61M2039/242; A61M2039/2426; A61M2039/2433; A61M2039/2446; A61M2039/2466; A61M39/1033
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
131 words
A medical valve including a housing having an inlet and an outlet and a normally closed disc valve, valve actuator, and valve seat situated therebetween, the disc valve being openable by a blunt cannula inserted through the inlet and acting upon the valve actuator, the disc valve being mounted for movement by the valve actuator away from the valve seat within the housing to create an uninterrupted annular through opening between the valve seat and the disc valve, and an environmental barrier separate from the disc valve and extending completely across the housing inlet, the environmental barrier including an elastomeric slit septum, the slit being normally biased closed and being openable under pressure of the blunt cannula to allow the blunt cannula to pass through the slit to the disc valve.
Claim 2
Dependent Claim
131 words
A medical valve including a housing having an inlet and an outlet and a normally closed disc valve, valve actuator, and valve seat situated therebetween, the disc valve being openable by a blunt cannula inserted through the inlet and acting upon the valve actuator, the disc valve being mounted for movement by the valve actuator away from the valve seat within the housing to create an uninterrupted annular through opening between the valve seat and the disc valve, and an environmental barrier separate from the disc valve and extending completely across the housing inlet, the environmental barrier including an elastomeric slit septum, the slit being normally biased closed and being openable under pressure of the blunt cannula to allow the blunt cannula to pass through the slit to the disc valve.
Claim 3
Dependent Claim
29 words
In the medical device of claim 1, the improvement further comprising providing duckbill lips between the environmental barrier and the disc valve, the duckbill lips extending along the slit.
Claim 4
Dependent Claim
18 words
In the medical device of claim 2 wherein the duckbill lips are formed integral with the environmental barrier.
References Cited (Backward Citations)
US3986508A
Cited
US3994293A
Cited
US3977400A
Cited
GB2012919A
Cited
US4326569A
Cited
DE3042229A1
Cited
DE3242870A1
Cited
US4511359A
Cited
US4610665A
Cited
US4601703A
Cited
US4535820A
Cited
US4966588A
Cited
US4765588A
Cited
US4683916A
Cited
US4768568A
Cited
US4909798A
Cited
US5135489A
Cited
US4886507A
Cited
US5059186A
Cited
US4857062A
Cited
US4917668A
Cited
US4895346A
Cited
US4874377A
Cited
US4950257A
Cited
US5000745A
Cited
US5041095A
Cited
US5049128A
Cited
US5207656A
Cited
US5190067A
Cited
US5215537A
Cited
US5203775A
Cited
US5163922A
Cited
US5092857A
Cited
US5104389A
Cited
US5269763A
Cited
US5211634A
Cited
US5195980A
Cited
US5242423A
Cited
US5251873A
Cited
US5251873B1
Cited
US5242393A
Cited
US5312362A
Cited
US5269771A
Cited
US5441487A
Cited
US5470319A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-11-26 | 2000-05-27 | 2000-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-11-26 | 2004-05-27 | 2004-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-11-26 | 2008-05-27 | 2008-11-26 | $7700.00 | Window Closed / Lapsed |