Patent FR29611E successfully refreshed from Google Patents.
Patent US3850197A successfully refreshed from Google Patents.
US3850197A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inspiration/expiration valve
Assignee: F Hoffmann La Roche AG
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Filing: 1973-03-15
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Granted: 1974-11-26
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Expires: 1993-03-15
Abstract
Abstract A valve device having virtually no moving parts and particularly useful as an inspiration/expiration valve for respirators comprising a housing in which there is disposed at least two perpendicular channels intersecting in a T-shaped configuration, a flow-immersed oblong body disposed in a first one of the channels and in part at a position opposite to a region of intersection of the second channel with the first channel and where connection points are provided at least at non-intersecting ends of the channels.
Inventors
- 👤 H Ernst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 04:06
CPC Classifications
A; A61; A61M; A61M16/00; A61M16/20; A61M16/208; A62; A62B; A62B9/00; A62B9/02; Y; Y10; Y10T; Y10T137/00; Y10T137/8593
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
180 words
A device having use as a valve, via which a gas or liquid stream may be led from a first connection to a second connection while an oppositely directed stream arriving by way of this second connection is led to a third connection, comprising: a first channel extending between said first and second connections; a second channel intersecting via one of the ends thereof said first channel and with the other end thereof defining said third connection; and an oblong flow-immersed body longitudinally disposed in said first channel in the region of intersection with said second channel, said body having an angled boring leading from the end portion of the body facing said second connection to the side surface of the body at a portion thereof facing the region of intersection of said first and second channels, said flow-immersed body having a cross-section which widens from the two ends of said body towards the central portion thereof such that proximate said central portion said first channel is restricted by said body to a narrow passage for gas or liquid flow.
Claim 2
Independent Claim
180 words
A device having use as a valve, via which a gas or liquid stream may be led from a first connection to a second connection while an oppositely directed stream arriving by way of this second connection is led to a third connection, comprising: a first channel extending between said first and second connections; a second channel intersecting via one of the ends thereof said first channel and with the other end thereof defining said third connection; and an oblong flow-immersed body longitudinally disposed in said first channel in the region of intersection with said second channel, said body having an angled boring leading from the end portion of the body facing said second connection to the side surface of the body at a portion thereof facing the region of intersection of said first and second channels, said flow-immersed body having a cross-section which widens from the two ends of said body towards the central portion thereof such that proximate said central portion said first channel is restricted by said body to a narrow passage for gas or liquid flow.
Claim 3
Dependent Claim
27 words
A device according to claim 1 wherein said channels and said flow-immersed body have circular cross-sections and wherein said body is disposed concentrically inside said first channel.
Claim 4
Dependent Claim
50 words
A device according to claim 2 further including guide vane means provided on the conical part of said body facing said first connection, said guide vane means being radially arranged on said body with predetermined slight displacement with respect to planes intersecting through an axis defined by said first channel.
Claim 5
Dependent Claim
40 words
A device according to claim 2 wherein said central portion is cylindrically shaped and extends toward said first connection from a plane perpendicular to the axis defined by said first channel, set through the axis defined by said second channel.
Claim 6
Dependent Claim
29 words
A device according to claim 2 wherein said boring is angled at 90* to thereby run concentrically to each of the axes defined by said first and second channels.
Claim 7
Dependent Claim
24 words
A device according to claim 2 wherein said second channel includes a channel cross-section broadening toward said third connection to serve as a diffuser.
Claim 8
Dependent Claim
33 words
A device according to claim 1 further including a tubular member extending coaxially with said second channel through said first channel and said flow-immersed body into the intersecting end of said second channel.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-25 | 1978-05-27 | 1978-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-25 | 1982-05-27 | 1982-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-25 | 1986-05-27 | 1986-11-26 | $7700.00 | Window Closed / Lapsed |