US5085100A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gear shrouding system
Assignee: Bell Helicopter Michigan Inc
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Filing: 1991-01-24
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Granted: 1992-02-04
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Expires: 2011-01-24
Abstract
Abstract A shroud (20) for a gear train (12) disposed within a gear case (22) includes a plurality of meshing gears (14), each gear (14) having sides (14a, 14b), teeth (16) and an outer diameter (14c). The shroud (20) encircles the outer diameter (14c) of each gear (14) within the gear train (12) and for enclosing the sides (14a, 14b) adjacent to the outer diameter (14c) of each gear (14) within the gear train (12). The shroud (20) includes a pair of side walls (20a, 20b) and an end wall (20c). The walls (20a, 20b, 20c) enclosed the teeth (16) of each of the gears (14) within the gear train (12) for substantially minimizing cooling fluid present within the gear case (22) from contacting the gear train (12).
Inventors
- 👤 Charles L. Duello
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:27
CPC Classifications
F; F16; F16H; F16H57/00; F16H57/04; F16H57/048; F16H57/0493; F16H57/0456; F16H57/042; F16H57/0421; F16H57/0423; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19991; Y10T74/21; Y10T74/2186
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
116 words
In a high speed gear train including a gear case and a plurality of meshing gears, each gear having sides, teeth and an outer diameter, a shroud being disposed within the gear case the shroud comprising: a pair of side walls disposed opposite the sides of each gear and adjacent to the gear outer diameter; and an end wall disposed generally perpendicularly to said pair of side walls and being disposed parallel to the gear outer diameter, such that said shroud side walls and end wall substantially enclose the teeth of each of the plurality of gears within the gear train for substantially minimizing cooling fluid present within the gear case from contacting the gear train.
Claim 2
Dependent Claim
116 words
In a high speed gear train including a gear case and a plurality of meshing gears, each gear having sides, teeth and an outer diameter, a shroud being disposed within the gear case the shroud comprising: a pair of side walls disposed opposite the sides of each gear and adjacent to the gear outer diameter; and an end wall disposed generally perpendicularly to said pair of side walls and being disposed parallel to the gear outer diameter, such that said shroud side walls and end wall substantially enclose the teeth of each of the plurality of gears within the gear train for substantially minimizing cooling fluid present within the gear case from contacting the gear train.
Claim 3
Dependent Claim
33 words
The shroud of claim 1 wherein said side wall includes a port adjacent to the area where gears mesh for allowing intake and discharge of cooling fluid and air from the gear train.
Claim 4
Dependent Claim
29 words
The shroud of claim 1 wherein the spacing between said side walls of said shroud and the side of a gear in the gear train is approximately 0.075 inches.
Claim 5
Dependent Claim
30 words
The shroud of claim 1 wherein the spacing between said end wall of said shroud and the gear teeth of a gear in the gear train is approximately 0.075 inches.
Claim 6
Dependent Claim
16 words
The shroud of claim 1 wherein said shroud side wall includes means for deflecting cooling fluid.
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) | 1995-02-03 | 1995-08-05 | 1996-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-02-03 | 1999-08-05 | 2000-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-02-03 | 2003-08-05 | 2004-02-04 | $7700.00 | Window Closed / Lapsed |