US4095644A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cooling system for gear reducers
Assignee: Reliance Electric Co
•
Filing: 1976-11-10
•
Granted: 1978-06-20
•
Expires: 1996-11-10
Abstract
Abstract A cooling system for gear reducers having a housing with a lubricant therein, in which a motor for the pump and heat exchanger are mounted on a base structure to form a unitary assembly which can be fully assembled in the manufacturing plant and delivered to and installed at the site of the gear reducer. The temperature of the lubricant in the line from the gear reducer to the pump is sensed by a temperature responsive device and a control valve in the coolant line is regulated thereby for producing an intermittent flow to control the efficiency of the heat exchanger and thereby regulate the temperature of the lubricant in a predetermined range. A second temperature responsive device may be utilized to sense the temperature of the lubricant in the hot lubricant line and to shut down the equipment in the event the temperature of the lubricant, and consequently the temperature of the gear reducer, exceeds a predetermined value. A by-pass line having a relief valve may be included between the hot lubricant line and the return line to by-pass the lubricant around the heat exchanger in the event the flow through the heat exchanger becomes restricted and the pressure in the hot lubricant tends to become excessively high.
Inventors
- 👤 Robert O. Huff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 04:33
CPC Classifications
F; F16; F16H; F16H57/00; F16H57/04; F16H57/0412; F16H57/0415; Y; Y02; Y02P; Y02P80/00; Y02P80/10
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
131 words
A cooling system for gear reducers having a housing with a lubricant therein, comprising a pump, a motor for driving said pump, a hot lubricant line for connecting said pump to the reducer housing, a heat exchanger, a pump outlet line connecting said pump to said heat exchanger, a return line connecting said heat exchanger to the reducer housing, a supply line connecting said heat exchanger to a source of coolant, a discharge line for said coolant from said heat exchanger, a control valve in said supply line, means for sensing the temperature in said hot lubricant line anterior to said pump and regulating the operation of the control valve in said coolant supply line, and a base structure supporting said pump, heat exchanger and connecting lines as a unitary assembly.
Claim 2
Dependent Claim
131 words
A cooling system for gear reducers having a housing with a lubricant therein, comprising a pump, a motor for driving said pump, a hot lubricant line for connecting said pump to the reducer housing, a heat exchanger, a pump outlet line connecting said pump to said heat exchanger, a return line connecting said heat exchanger to the reducer housing, a supply line connecting said heat exchanger to a source of coolant, a discharge line for said coolant from said heat exchanger, a control valve in said supply line, means for sensing the temperature in said hot lubricant line anterior to said pump and regulating the operation of the control valve in said coolant supply line, and a base structure supporting said pump, heat exchanger and connecting lines as a unitary assembly.
Claim 3
Dependent Claim
62 words
A cooling system for gear reducers as defined in claim 1 in which a second means for sensing the temperature in said hot lubricant line controls the power driving the speed reducer for shutting down the equipment in which the reducer is used in the event excessive temperatures are created in the gear reducer as indicated by the temperature of the lubricant.
Claim 4
Dependent Claim
36 words
A cooling system for gear reducers as defined in claim 1 in which a filter is disposed in said hot lubricant line anterior to said pump and a second filter is disposed in said return line.
Claim 5
Dependent Claim
39 words
A cooling system for gear reducers as defined in claim 1 in which said base structure supporting said pump, heat exchanger and connecting lines as a unitary assembly consists of a panel having the several components mounted rigidly thereon.
Claim 6
Dependent Claim
39 words
A cooling system for gear reducers as defined in claim 1 in which said means for sensing the temperature of the hot lubricant regulates said control valve for intermittent operation to maintain the lubricant within a preselected temperature range.
Claim 7
Dependent Claim
31 words
A cooling system for gear reducers as defined in claim 1 in which a by-pass line interconnects said pump outlet line with said return line and contains a relief valve therein.
Claim 8
Dependent Claim
64 words
A cooling system for gear reducers as defined in claim 6 in which a second means for sensing the temperature in said hot lubricant line controls the power driving the speed reducer for shutting down equipment in which the reducer is used and the system in the event excessive temperatures are created in the gear reducer as indicated by the temperature of the lubricant.
Claim 9
Dependent Claim
44 words
A cooling system for gear reducers as defined in claim 7 in which a filter is disposed in said hot lubricant line anterior to said pump and a second filter is disposed in said return line posterior to the connection with said by-pass line.
Claim 10
Dependent Claim
39 words
A cooling system for gear reducers as defined in claim 8 in which said base structure supporting said pump, heat exchanger and connecting lines as a unitary assembly consists of a panel having the several components mounted rigidly thereon.
Claim 11
Dependent Claim
39 words
A cooling system for gear reducers as defined in claim 9 in which said means for sensing the temperature of the hot lubricant regulates said control valve for intermittent operation to maintain the lubricant within a preselected temperature range.
References Cited (Backward Citations)
US1902970A
Cited
US2008164A
Cited
US2278992A
Cited
US2433420A
Cited
US2476405A
Cited
US2512189A
Cited
US2480120A
Cited
US2460754A
Cited
US3743011A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-06-19 | 1981-12-19 | 1982-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-19 | 1985-12-19 | 1986-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-19 | 1989-12-19 | 1990-06-20 | $7700.00 | Window Closed / Lapsed |