US3736812A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Speed reducer recirculating cooling system
Assignee: Rexnord Industries LLC
•
Filing: 1971-06-28
•
Granted: 1973-06-05
•
Expires: 1991-06-28
Abstract
Abstract A closed recirculating air cooling system for a speed reducer having a plurality of gears disposed in a housing which comprises a dirven fan for withdrawing warm air from inside the housing, a cooling network for receiving and cooling the warm air, and duct means for conducting cooled air back into the housing. Provision may also be included for collecting oil entrapped in the air and returning it into the speed reducer housing.
Inventors
- 👤 E Wellauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:04
CPC Classifications
F; F16; F16H; F16H57/00; F16H57/04; F16H57/048; F16H57/0493; F16H57/0412; F16H57/0415; F16H57/0417; Y; Y10; Y10T; Y10T74/00; Y10T74/21; Y10T74/2186; Y10T74/2189
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
166 words
In a speed reducer of the type having a plurality of gears disposed on several shafts in a housing having a lower portion that contains a lubricating fluid, and at least one of said shafts is an input shaft and at least one of said shafts is an output shaft, a closed recirculating cooling system comprising, in combination: a suction port formed in a wall of the housing of the speed reducer; suction means mounted to overlie the suction port and draw air out of the housing through the suction port; enclosure means that fits over the suction means and is hermetically sealed to the housing wall; external heat exchanging means for cooling air; first conduit means for conveying air from the enclosure means to the heat exchanger; second conduit means for conveying air from the heat exchanger into the housing; and an oil return line that communicates between the heat exchanger and the housing to return condensed oil frOm the heat exchanger into the housing.
Claim 2
Dependent Claim
166 words
In a speed reducer of the type having a plurality of gears disposed on several shafts in a housing having a lower portion that contains a lubricating fluid, and at least one of said shafts is an input shaft and at least one of said shafts is an output shaft, a closed recirculating cooling system comprising, in combination: a suction port formed in a wall of the housing of the speed reducer; suction means mounted to overlie the suction port and draw air out of the housing through the suction port; enclosure means that fits over the suction means and is hermetically sealed to the housing wall; external heat exchanging means for cooling air; first conduit means for conveying air from the enclosure means to the heat exchanger; second conduit means for conveying air from the heat exchanger into the housing; and an oil return line that communicates between the heat exchanger and the housing to return condensed oil frOm the heat exchanger into the housing.
Claim 3
Dependent Claim
29 words
The combination of claim 1 wherein the suction means is mounted on one end of the input shaft of the speed reducer and is driven by said input shaft.
Claim 4
Dependent Claim
21 words
The combination of claim 1 further including a motor mounted on the enclosure means, and arranged to drive the suction means.
References Cited (Backward Citations)
US2419439A
Cited
CH115797A
Cited
GB344703A
Cited
US2391186A
Cited
US2654583A
Cited
US2947798A
Cited
US2990443A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-04 | 1976-12-04 | 1977-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-04 | 1980-12-04 | 1981-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-04 | 1984-12-04 | 1985-06-05 | $7700.00 | Window Closed / Lapsed |