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US4023661A Expired / Lapsed US ⏱️ 0.0 years remaining

Cooling system for a vehicle clutch

Assignee: Dana Inc
•
Filing: 1975-11-10
•
Granted: 1977-05-17
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Expires: 1995-11-10
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Abstract

Abstract A cooling system for a vehicle clutch including a cooling fluid distribution means and a heat exchange means. A bell housing encloses the clutch assembly and provides a sump for containing cooling fluid. A clutch pressure plate has a plurality of pickup tubes formed on its periphery which are passed through the cooling fluid as the pressure plate rotates with the engine flywheel. The cooling fluid is forced through the pickup tubes into the interior of the clutch assembly where the cooling fluid draws heat from the clutch elements and then drains back into the sump. The inlet openings of adjacent pickup tubes are offset with respect to one another to increase the flow of cooling fluid. The rotation of the flywheel and the pressure plate generates a flow of the cooling fluid in the pool. A sump pan is connected to the bell housing and includes a baffle for diverting the flow of cooling fluid into the sump pan which is formed with a corrugated bottom and finned sides to function as a heat exchange means.

Inventors

  • 👤 Richard A. Flotow

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-28 16:14
CPC Classifications
F; F16; F16D; F16D13/00; F16D13/22; F16D13/38; F16D13/46; F16D13/48; F16D13/58; F16D13/72

Claims Analysis

Total Claims: 8
Claim 1
Independent Claim 113 words
A cooling system for a clutch assembly comprising a disc assembly, a pressure plate, a source of a cooling fluid and a cooling fluid distribution means for supplying said cooling fluid to the interior of the clutch assembly, said distribution means including at least a pair of pickup tubes formed on the periphery of said pressure plate, each of said pickup tubes defining an inlet opening connected in fluid communication with the interior of the clutch assembly by a fluid passageway and wherein said inlet opening of each of said pickup tubes is offset with respect to the path of travel of said inlet opening of the other one of said pickup tubes.
Claim 2
Dependent Claim 113 words
A cooling system for a clutch assembly comprising a disc assembly, a pressure plate, a source of a cooling fluid and a cooling fluid distribution means for supplying said cooling fluid to the interior of the clutch assembly, said distribution means including at least a pair of pickup tubes formed on the periphery of said pressure plate, each of said pickup tubes defining an inlet opening connected in fluid communication with the interior of the clutch assembly by a fluid passageway and wherein said inlet opening of each of said pickup tubes is offset with respect to the path of travel of said inlet opening of the other one of said pickup tubes.
Claim 3
Dependent Claim 31 words
A cooling system according to claim 1 wherein said cooling fluid source is a bell housing enclosing the clutch assembly having a sump for containing a pool of said cooling fluid.
Claim 4
Dependent Claim 18 words
A cooling system according to claim 1 including heat exchange means for dissipating heat from said cooling fluid.
Claim 5
Dependent Claim 46 words
A cooling system according to claim 3 wherein said heat exchange means is a sump pan having a baffle extending into said cooling fluid source for diverting into said sump pan a flow of said cooling fluid generated by the rotation of said rotating clutch element.
Claim 6
Dependent Claim 19 words
A cooling system according to claim 4 wherein said baffle is inclined toward the flow of said cooling fluid.
Claim 7
Dependent Claim 17 words
A cooling system according to claim 4 wherein said sump pan is formed with a corrugated bottom.
Claim 8
Dependent Claim 17 words
A cooling system according to claim 4 wherein said sump pan is formed with external cooling fins.

References Cited (Backward Citations)

US1333440A Cited
US1327767A Cited
US1859280A Cited
US3659668A Cited
US3741343A Cited
US3897860A Cited
US3924715A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1980-05-16 1980-11-15 1981-05-17 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1984-05-16 1984-11-15 1985-05-17 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1988-05-16 1988-11-15 1989-05-17 $7700.00 Window Closed / Lapsed

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