Patent US3874183A successfully refreshed from Google Patents.
US3874183A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cooling device for fluid of a motor vehicle transmission
Assignee: HUGHES D BURTON
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Filing: 1974-02-21
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Granted: 1975-04-01
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Expires: 1994-02-21
Abstract
Abstract A motor vehicle transmission is associated in fluid connection with a reservoir for the fluid, means for circulating the fluid between the transmission and the reservoir and a thermoelectric cooling device in heat conducting association with the reservoir.
Inventors
- 👤 Michael A Tabet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:12
CPC Classifications
F; F16; F16H; F16H57/00; F16H57/04; F16H57/0412; B; B60; B60H; B60H1/00; B60H1/00478; B60H1/00642; B60H1/00814; B60H1/00878; B60H1/00899; B60H1/02; B60H1/14; B60K; B60K11/00; F16H57/0413; F25; F25B; F25B21/00; F25B21/02; Y; Y10; Y10T; Y10T74/00; Y10T74/21; Y10T74/2186; Y10T74/2189
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
48 words
Means for cooling a fluid in a change-speed gear box comprising a reservoir for storage of a supply of said fluid, means for circulating fluid between the gear box and the reservoir, and means for withdrawing heat from the fluid in the reservoir comprising a thermoelectric heat pump.
Claim 2
Dependent Claim
48 words
Means for cooling a fluid in a change-speed gear box comprising a reservoir for storage of a supply of said fluid, means for circulating fluid between the gear box and the reservoir, and means for withdrawing heat from the fluid in the reservoir comprising a thermoelectric heat pump.
Claim 3
Dependent Claim
32 words
The cooling means of claim 1 wherein said means for withdrawing heat from the fluid comprises a thermoelectric cooling device, a heat sink and a sheet of heat conductive electrical insulation therebetween.
Claim 4
Dependent Claim
27 words
The cooling means of claim 1 comprising means responsive to temperature change of the fluid for automatically connecting the heat pump electrically to an electrical power source.
Claim 5
Dependent Claim
24 words
The cooling means of claim 1 having means for connecting the heat pump to a power source when the temperature of the fluid rises.
Claim 6
Dependent Claim
84 words
A means for cooling a fluid used in a change-speed gear box comprising a reservoir, a conduit leading from the reservoir to a gear box for flow of fluid from the gear box to the reservoir, a conduit for flow of fluid from the reservoir to the gear box, a pump for moving fluid through said conduits, a thermoelectric heat pump disposed against a wall of the reservoir, a heat sink associated with the said heat pump, and means for actuating the heat pump.
Claim 7
Dependent Claim
84 words
A means for cooling a fluid used in a change-speed gear box comprising a reservoir, a conduit leading from the reservoir to a gear box for flow of fluid from the gear box to the reservoir, a conduit for flow of fluid from the reservoir to the gear box, a pump for moving fluid through said conduits, a thermoelectric heat pump disposed against a wall of the reservoir, a heat sink associated with the said heat pump, and means for actuating the heat pump.
Claim 8
Dependent Claim
34 words
The device of claim 5 comprising means for sensing the temperature of fluid in the reservoir and a semiconductive switch responsive to the temperature sensing means for turning the heat pump on and off.
References Cited (Backward Citations)
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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) | 1978-03-31 | 1978-09-30 | 1979-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-31 | 1982-09-30 | 1983-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-31 | 1986-09-30 | 1987-04-01 | $7700.00 | Window Closed / Lapsed |