Patent US2758115A successfully refreshed from Google Patents.
Patent US5518448A successfully refreshed from Google Patents.
US5518448A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air conditioning duct for railway vehicles
Assignee: Fiat Ferroviaria SpA
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Filing: 1994-08-04
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Granted: 1996-05-21
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Expires: 2014-08-04
Abstract
Abstract A duct (1) for the distribution of air conditioning from an air treating apparatus (4) into the inner environment (A) of a railway vehicle (C), comprising an inner tube (2) having radial air outlet holes (5) and an outer tube (3) containing the inner tube (2) and formed with air outlet apertures (6), facing towards the inner environment (A) of the vehicle (C) and arranged in opposite positions with respect to the radial holes (5) of the inner tube (2).
Inventors
- 👤 Lino Madoglio
- 👤 Benedetto Rossini
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:20
CPC Classifications
B; B60; B60H; B60H1/00; B60H1/24; B60H1/247; B61; B61D; B61D27/00; F; F24; F24F; F24F13/00; F24F13/02; F24F13/06; F24F13/068; Y; Y10; Y10S; Y10S454/00; Y10S454/906
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
193 words
A duct for the distribution of air conditioning from an air treating apparatus to the inner environment of a railway vehicle, comprising: an inner tube of elastomeric material having one end section connected to said air treatment apparatus and having a closed opposite end, said inner tube being provided with a plurality of radial air outlet holes distributed as a function of local pressure of the air supplied from said treatment apparatus, and an outer tube within which said inner tube is housed, said outer tube being formed with air outlet apertures facing towards the inner environment of the vehicle, wherein the radial holes of said inner tube and the outlet apertures of the outer tube are arranged in a mutually opposed configuration to substantially avoid direct flow of air from the radial holes of the inner tube through the air outlet apertures in the outer tube, said apertures in said outer tube being constituted by slits each having an air permeable insert disposed therein, and wherein the number of radial air outlet holes increase in number from said one end section connected to said air treatment apparatus toward said closed opposite end.
Claim 2
Dependent Claim
193 words
A duct for the distribution of air conditioning from an air treating apparatus to the inner environment of a railway vehicle, comprising: an inner tube of elastomeric material having one end section connected to said air treatment apparatus and having a closed opposite end, said inner tube being provided with a plurality of radial air outlet holes distributed as a function of local pressure of the air supplied from said treatment apparatus, and an outer tube within which said inner tube is housed, said outer tube being formed with air outlet apertures facing towards the inner environment of the vehicle, wherein the radial holes of said inner tube and the outlet apertures of the outer tube are arranged in a mutually opposed configuration to substantially avoid direct flow of air from the radial holes of the inner tube through the air outlet apertures in the outer tube, said apertures in said outer tube being constituted by slits each having an air permeable insert disposed therein, and wherein the number of radial air outlet holes increase in number from said one end section connected to said air treatment apparatus toward said closed opposite end.
Claim 3
Dependent Claim
16 words
A duct as set forth in claim 1, wherein said inner tube has a curvilinear cross-section.
Claim 4
Dependent Claim
13 words
Duct according to claim 1, wherein said inserts are constituted by wire gauzes.
Claim 5
Dependent Claim
13 words
Duct according to claim 1, wherein said inserts are constituted by micro-pierced plates.
Claim 6
Dependent Claim
14 words
Duct according to claim 1, wherein said inserts are constituted by open cell sponges.
Claim 7
Dependent Claim
209 words
A railway vehicle having a body structure defining an interior environment and comprising an air treating apparatus and at least one duct for the distribution of air from said air treating apparatus to said environment, said duct comprising: an inner tube of elastomeric material having one end section connected to said air treatment apparatus and having a closed opposite end, said inner tube being provided with a plurality of radial air outlet holes distributed as a function of local pressure of the air supplied from said treatment apparatus, and an outer tube within which said inner tube is housed, said outer tube being formed with air outlet apertures facing towards the inner environment of the vehicle, wherein the radial holes of said inner tube and the outlet apertures of the outer tube are arranged in a mutually opposed configuration to substantially avoid direct flow of air from the radial holes of the inner tube through the air outlet apertures in the outer tube, said apertures in said outer tube being constituted by slits each having an air permeable insert disposed therein, and wherein the number of radial air outlet holes increase in number from said one end section connected to said air treatment apparatus toward said closed opposite end.
Claim 8
Dependent Claim
209 words
A railway vehicle having a body structure defining an interior environment and comprising an air treating apparatus and at least one duct for the distribution of air from said air treating apparatus to said environment, said duct comprising: an inner tube of elastomeric material having one end section connected to said air treatment apparatus and having a closed opposite end, said inner tube being provided with a plurality of radial air outlet holes distributed as a function of local pressure of the air supplied from said treatment apparatus, and an outer tube within which said inner tube is housed, said outer tube being formed with air outlet apertures facing towards the inner environment of the vehicle, wherein the radial holes of said inner tube and the outlet apertures of the outer tube are arranged in a mutually opposed configuration to substantially avoid direct flow of air from the radial holes of the inner tube through the air outlet apertures in the outer tube, said apertures in said outer tube being constituted by slits each having an air permeable insert disposed therein, and wherein the number of radial air outlet holes increase in number from said one end section connected to said air treatment apparatus toward said closed opposite end.
Claim 9
Dependent Claim
17 words
A railway vehicle as set forth in claim 3, wherein the inner tube has a curvilinear cross-section.
Claim 10
Dependent Claim
13 words
Duct according to claim 6, wherein said inserts are constituted by wire gauzes.
Claim 11
Dependent Claim
13 words
Duct according to claim 6, wherein said inserts are constituted by micro-pierced plates.
Claim 12
Dependent Claim
14 words
Duct according to claim 6, wherein said inserts are constituted by open cell sponges.
References Cited (Backward Citations)
US1091733A
Cited
US1537587A
Cited
US1997387A
Cited
US4109563A
Cited
US4300441A
Cited
GB2124751A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-05-21 | 1999-11-20 | 2000-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-05-21 | 2003-11-20 | 2004-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-05-21 | 2007-11-20 | 2008-05-21 | $7700.00 | Window Closed / Lapsed |