US4840221A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for ventilating rheostats and/or fluid radiators in a locomotive
Assignee: Alstom SA
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Filing: 1988-10-31
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Granted: 1989-06-20
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Expires: 2008-10-31
Abstract
Abstract A device for ventilating fluid radiators (5) and/or starting and braking rheostats (15) in a locomotive which is powered electrically, by means of an internal combustion engine, or by a combination thereof, said radiators and/or rheostats being disposed in a layer close to the locomotive roof (4). The device includes at least one tangential fan (8,9) having a horizontal axis which extends longitudinally relative to the locomotive and blowing air towards said radiators and/or said rheostats. The device further includes air intake openings (6,7) located in the side faces (2,3) of the locomotive.
Inventors
- 👤 Jean-Claude Dumas
- 👤 Maurice Thoraval
- 👤 Gerard Genuit
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:35
CPC Classifications
B; B61; B61D; B61D37/00; B61C; B61C5/00; B61C5/02; B61C17/00; B61C17/04; H; H05; H05K; H05K7/00; H05K7/20; H05K7/2089; H05K7/20909; Y; Y02; Y02T; Y02T30/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
158 words
A device for ventilating at least one of a fluid radiator unit and a starting and braking rheostat unit in a locomotive having side walls and a roof, which locomotive is powered electrically, by means of an internal combustion engine or by a combination thereof, said at least one unit requiring ventilation being disposed below and in proximity of the locomotive roof, said device comprising two tangential fans having a horizontal axis of rotation placed longitudinally relative to the locomotive, a triangular shaped volute between said tangential fans and slide baffles above said tangential fans defining separate access chambers from the outlet of said tangential fans to the underside of said one unit, the sum of the cross sections of said access chambers at the underside of said one unit being substantially equal to the area of said at least one unit requiring ventilation, and an air intake opening being placed in each side wall of the locomotive.
Claim 2
Independent Claim
158 words
A device for ventilating at least one of a fluid radiator unit and a starting and braking rheostat unit in a locomotive having side walls and a roof, which locomotive is powered electrically, by means of an internal combustion engine or by a combination thereof, said at least one unit requiring ventilation being disposed below and in proximity of the locomotive roof, said device comprising two tangential fans having a horizontal axis of rotation placed longitudinally relative to the locomotive, a triangular shaped volute between said tangential fans and slide baffles above said tangential fans defining separate access chambers from the outlet of said tangential fans to the underside of said one unit, the sum of the cross sections of said access chambers at the underside of said one unit being substantially equal to the area of said at least one unit requiring ventilation, and an air intake opening being placed in each side wall of the locomotive.
Claim 3
Dependent Claim
35 words
A device according to claim 1, wherein each tangential fan is disposed slightly below said at least one unit, and wherein each said air intake opening is placed near the top of the side wall.
Claim 4
Dependent Claim
37 words
A device according to claim 1, wherein said at least one unit includes both said radiator unit and said rheostat unit, and wherein said rheostat unit is disposed above said radiator unit and beneath the locomotive roof.
Claim 5
Dependent Claim
56 words
A device according to claim 1, wherein each air intake opening and said at least one unit is placed relative to each tangential fan in such a manner that the air is sucked along a substantially horizontal path towards the fan and is blown in a substantially vertical path therefrom towards said at least one unit.
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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) | 1992-06-19 | 1992-12-19 | 1993-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-19 | 1996-12-19 | 1997-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-19 | 2000-12-19 | 2001-06-20 | $7700.00 | Window Closed / Lapsed |