Patent US5228646A successfully refreshed from Google Patents.
US5228646A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Latching trumpet valve for medical infusions
Assignee: B Braun Medical Inc
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Filing: 1992-07-06
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Granted: 1993-07-20
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Expires: 2012-07-06
Abstract
Abstract A valve for controlling medical infusions includes a one-piece plastic body, and a plunger assembly inserted into the body from one end. The plungers is connected to a manually operable cap containing a return spring, and the cap has a rim with a pair of internal barbs which engage an external flange on the body when the cap is fully depressed, to latch the valve open. A pair of flats on the cap rim are squeezed together in order to release the latch.
Inventors
- 👤 Kenneth Raines
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:27
CPC Classifications
A; A61; A61M; A61M39/00; A61M39/22; A61B; A61B1/00; A61B1/00064; A61B1/00066; A61B1/00068; F; F16; F16K; F16K27/00; F16K27/04; F16K27/041; F16K3/00; F16K3/22; F16K3/24
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
155 words
In a valve comprising a hollow body having a bore therein and a pair of fluid ports communicating with the bore, a plunger slidably disposed within the bore for movement between a closed position prohibiting fluid flow between said ports, and an open position permitting flow between said ports, a return spring for biasing said plunger toward one of said positions, and a manual operator extending from one end of the body for moving said plunger against said spring bias, the improvement wherein said body has an external continuous flange around said one end and said operator comprises a depressible cap having a rim extending over and outside said flange, said rim having a pair of opposed, internal latching barbs which engage behind said flange when the cap is fully depressed, said cap being sufficiently resilient that the latching barbs can be released by squeezing the rim at opposed spots misaligned with said latching barbs.
Claim 2
Dependent Claim
155 words
In a valve comprising a hollow body having a bore therein and a pair of fluid ports communicating with the bore, a plunger slidably disposed within the bore for movement between a closed position prohibiting fluid flow between said ports, and an open position permitting flow between said ports, a return spring for biasing said plunger toward one of said positions, and a manual operator extending from one end of the body for moving said plunger against said spring bias, the improvement wherein said body has an external continuous flange around said one end and said operator comprises a depressible cap having a rim extending over and outside said flange, said rim having a pair of opposed, internal latching barbs which engage behind said flange when the cap is fully depressed, said cap being sufficiently resilient that the latching barbs can be released by squeezing the rim at opposed spots misaligned with said latching barbs.
Claim 3
Dependent Claim
49 words
The invention of claim 1, further comprising a pair of opposed external flats on said rim, said flats lying on an axis substantially perpendicular to an axis extending through said latching barbs, whereby one can release the valve from its latched position by squeezing the flats toward one another.
Claim 4
Dependent Claim
53 words
The invention of claim 2, further comprising a pair of opposed retention barbs extending inwardly from said rim, and lying on an axis substantially parallel to that of said flats, said retention barbs engaging said flange, to prevent removal of said plunger from said body, when the valve is in its closed position.
Claim 5
Dependent Claim
19 words
The invention of claim 3, wherein the flange has a chamfered leading edge, to facilitate assembly of the valve.
Claim 6
Dependent Claim
22 words
The invention of claim 3, wherein each of said retention barbs has a chamfered leading edge, to facilitate assembly of the valve.
Claim 7
Dependent Claim
25 words
The invention of claim 1, wherein each of said latching barbs has a chamfered leading edge, to facilitate moving the cap to its latched position.
References Cited (Backward Citations)
US1301577A
Cited
US1463735A
Cited
US2506722A
Cited
US2723829A
Cited
US2690895A
Cited
US2591514A
Cited
US2678147A
Cited
US2986370A
Cited
US3146987A
Cited
US3169672A
Cited
US3305144A
Cited
US3220695A
Cited
US3434694A
Cited
US3370143A
Cited
US3940106A
Cited
US3788602A
Cited
US4147184A
Cited
US4573658A
Cited
US4691895A
Cited
US5085135A
Cited
US5064168A
Cited
US5083743A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-07-19 | 1997-01-18 | 1997-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-07-19 | 2001-01-18 | 2001-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-07-19 | 2005-01-18 | 2005-07-20 | $7700.00 | Window Closed / Lapsed |