Cooling device for fluid of a motor vehicle transmission

• US 3,874,183 A
• Filed: 02/21/1974
• Issued: 04/01/1975
• Est. Priority Date: 02/21/1974
• Status: Expired due to Term

• Current Assignee: Michael A. Tabet
• Original Assignee: Michael A. Tabet
• Inventors: Tabet, Michael A.
• Primary Examiner(s): Wye, William J.
• Application Number:
  US05/444,679
• Time in Patent Office: 404 Days
• Field of Search: 74/66A,66R 62/3 123/196AB
• US Class Current: 62/3.61
• CPC Class Codes: B60H 1/00478 Air-conditioning devices using the Peltier effect for air-conditioning in general F24F5/0042; for refrigeration F25B21/02; electric devices exhibiting the Peltier effect H10N10/00
• CPC Class Codes: B60H 1/00899 Controlling the flow of liquid in a heat pump system controlling the properties of the refrigerant liquid, e.g. pressure or temperature, B60H1/3204
• CPC Class Codes: B60H 1/14 otherwise than from cooling liquid of the plant , e.g. heat from the grease oil, the brakes, the transmission unit B60H1/03 takes precedence
• CPC Class Codes: B60K 11/00 Arrangement in connection with cooling of propulsion units heating the interior space B60H; cooling internal combustion engines per se F01P
• CPC Class Codes: F16H 57/0412 Cooling or heating; Control of temperature
• CPC Class Codes: F16H 57/0413 Controlled cooling or heating of lubricant; Temperature control therefor
• CPC Class Codes: F25B 21/02 using Peltier effect; using Nernst-Ettinghausen effect
• CPC Class Codes: Y10T 74/2189 Cooling

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.

Claims

1. 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.

2. 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.

3. 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.

4. The cooling means of claim 1 having means for connecting the heat pump to a power source when the temperature of the fluid rises.

5. 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.

6. 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.