US4715244A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-scavenging gear box lubrication system
Assignee: Sundstrand Corp
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Filing: 1986-07-17
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Granted: 1987-12-29
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Expires: 2006-07-17
Abstract
Abstract A self-scavenging gear box lubrication system is disclosed and includes a gear box housing having at least one gear chamber providing relatively close confirmation with meshing gears rotatably mounted in the chamber. Lubricating fluid is delivered to the chamber for lubricating and cooling the gears. At least one collecting cavity for the lubricating fluid is provided in the housing separate from the gear chamber. A passage communicates between the gear chamber and the collecting cavity for passing fluid from the chamber to the cavity under the influence of centrifugal action effected by rotation of the meshing gears, whereby the fluid can be scavenged from the cavity by an appropriate lubrication pump. The passage is oriented generally tangentially of at least one of the meshing gears, and the passage is of restricted dimensions to provide a positive inlet presure to prevent backflow from the collecting cavity into the gear chamber at all attitudes.
Inventors
- 👤 William A. Byrd
- 👤 Anthony R. Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:48
CPC Classifications
F; F16; F16H; F16H57/00; F16H57/04; F16H57/048; F16H57/0493; F16H57/0402; F16H57/0412; F16H57/0415; F16N; F16N7/00; F16N7/38; F16N7/40; F16H57/042; F16H57/0421; F16H57/0423; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19991
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
151 words
A self-scavenging gear box lubrication system, comprising: gear box housing means having at least one gear chamber therein providing close conformation with at least two meshing gears rotatably mounted in the chamber; means for delivering lubricating fluid to the chamber; at least one lubricating fluid collecting cavity in the housing means separate from, coplanar with and radially spaced from the gear chamber; and passage means between the gears chamber and the collecting cavity and oriented generally coplanar with and tangentially of at least one of the meshing gears for passing fluid from the chamber to the cavity under the influence of centrifugal action effected by rotation of the gear teeth whereby the fluid can be scavenged from the cavity by appropriate lubrication pump means, said passage means being of restricted dimensions to provide a positive inlet pressure to prevent backflow from the collecting cavity into the gear chamber at all attitudes.
Claim 2
Dependent Claim
151 words
A self-scavenging gear box lubrication system, comprising: gear box housing means having at least one gear chamber therein providing close conformation with at least two meshing gears rotatably mounted in the chamber; means for delivering lubricating fluid to the chamber; at least one lubricating fluid collecting cavity in the housing means separate from, coplanar with and radially spaced from the gear chamber; and passage means between the gears chamber and the collecting cavity and oriented generally coplanar with and tangentially of at least one of the meshing gears for passing fluid from the chamber to the cavity under the influence of centrifugal action effected by rotation of the gear teeth whereby the fluid can be scavenged from the cavity by appropriate lubrication pump means, said passage means being of restricted dimensions to provide a positive inlet pressure to prevent backflow from the collecting cavity into the gear chamber at all attitudes.
Claim 3
Dependent Claim
35 words
The self-scavenging gear box lubrication system of claim 1, including stripper means at the entrance to the passage means from the gear chamber for directing the lubricating fluid from the chamber into the passage means.
Claim 4
Dependent Claim
22 words
The self-scavenging gear box lubrication system of claim 1, including a plurality of said collecting cavities disposed angularly about the gear chamber.
Claim 5
Dependent Claim
18 words
The self-scavenging gear box lubrication system of claim 3 wherein said collecting cavities substantially surround the gear chamber.
Claim 6
Dependent Claim
23 words
The self-scavenging gear box lubrication system of claims 3 or 4, including fluid conduit means interconnecting at least some of the collecting cavities.
Claim 7
Dependent Claim
24 words
The self-scavenging gear box lubrication system of claim 5 wherein said conduit means include a plurality of conduits spaced angularly about the gear chamber.
Claim 8
Dependent Claim
25 words
The self-scavenging gear box lubrication system of claims 1 or 3, including at least one collecting cavity on each opposite side of the gear chamber.
Claim 9
Dependent Claim
21 words
The self-scavenging gear box lubrication system of claim 7, including fluid conduit means interconnecting at least some of the collecting cavities.
Claim 10
Dependent Claim
33 words
The self-scavenging gear box lubrication system of claims 3 or 4, including fluid conduit means connecting all the collecting cavities whereby the pump means can be connected to only one of said cavities.
Claim 11
Dependent Claim
172 words
A self-scavenging gear box lubrication system, comprising: gear box housing means having at least one gear chamber therein providing close conformation with at least two meshing gears rotatably mounted in the chamber; means for delivering lubricating fluid to the chamber; a plurality of lubricating fluid collecting cavities in the housing means, the collecting cavities being separate from, coplanar with and radially spaced from the gear chamber and being spaced angularly thereabout; and passage means between the gear chamber and each respective collecting cavity, the passage means being located at the periphery of the gear chamber and oriented generally coplanar with and tangentially of the respective meshing gears for passing fluid from the chamber to the respective collecting cavity under the influence of centrifugal action effected by rotation of the gear teeth whereby the fluid can be scavenged from the cavities by appropriate lubrication pump means, said passage means being of restricted dimensions to provide a positive inlet pressure to prevent backflow from the collecting cavity into the gear chamber at all attitudes.
Claim 12
Dependent Claim
172 words
A self-scavenging gear box lubrication system, comprising: gear box housing means having at least one gear chamber therein providing close conformation with at least two meshing gears rotatably mounted in the chamber; means for delivering lubricating fluid to the chamber; a plurality of lubricating fluid collecting cavities in the housing means, the collecting cavities being separate from, coplanar with and radially spaced from the gear chamber and being spaced angularly thereabout; and passage means between the gear chamber and each respective collecting cavity, the passage means being located at the periphery of the gear chamber and oriented generally coplanar with and tangentially of the respective meshing gears for passing fluid from the chamber to the respective collecting cavity under the influence of centrifugal action effected by rotation of the gear teeth whereby the fluid can be scavenged from the cavities by appropriate lubrication pump means, said passage means being of restricted dimensions to provide a positive inlet pressure to prevent backflow from the collecting cavity into the gear chamber at all attitudes.
Claim 13
Dependent Claim
35 words
The self-scavenging gear box lubrication system of claim 10, including stripper means at the entrance to the passage means from the gear chamber for directing the lubricating fluid from the chamber into the passage means.
Claim 14
Dependent Claim
18 words
The self-scavenging gear box lubrication system of claim 10 wherein said collecting cavities substantially surround the gear chamber.
Claim 15
Dependent Claim
21 words
The self-scavenging gear box lubrication system of claim 12, including fluid conduit means interconnecting at least some of the collecting cavities.
Claim 16
Dependent Claim
24 words
The self-scavenging gear box lubrication system of claim 13 wherein said conduit means include a plurality of conduits spaced angularly about the gear chamber.
Claim 17
Dependent Claim
23 words
The self-scavenging gear box lubrication system of claim 10, including at least one collecting cavity on each opposite side of the gear chamber.
Claim 18
Dependent Claim
21 words
The self-scavenging gear box lubrication system of claim 10, including fluid conduit means interconnecting at least some of the collecting cavities.
Claim 19
Dependent Claim
31 words
The self-scavenging gear box lubrication system of claim 10, including fluid conduit means connecting all the collecting cavities whereby the pump means can be connected to only one of said cavities.
References Cited (Backward Citations)
US1220810A
Cited
US1357301A
Cited
US1610886A
Cited
US2235793A
Cited
US2386367A
Cited
US2565203A
Cited
US2762232A
Cited
US2822705A
Cited
US3029661A
Cited
US3121474A
Cited
US3146629A
Cited
US3529698A
Cited
US4068740A
Cited
US4231266A
Cited
US4217794A
Cited
US4222283A
Cited
US4355542A
Cited
US4359909A
Cited
US4368802A
Cited
US4429587A
Cited
US4612818A
Cited
US4630711A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-12-28 | 1991-06-29 | 1991-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-12-28 | 1995-06-29 | 1995-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-12-28 | 1999-06-29 | 1999-12-29 | $7700.00 | Window Closed / Lapsed |