US4945981A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil cooler
Assignee: Delphi Technologies Inc
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Filing: 1990-01-26
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Granted: 1990-08-07
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Expires: 2010-01-26
Abstract
Abstract A transmission oil cooler has spaced elongated plates secured at the margins and ports at either end to define an oil flow channel. A center disposed between the plates for creating turbulence in the oil and enhancing heat transfer comprises a metal sheet folded to form generally planar fins in side-by-side relationship and the fins having louvers extending over most of their area. The center is disposed in the flow channel with the planes of the fins transverse to the oil flow or alternatively with the planes of the fins parallel to the oil flow.
Inventors
- 👤 Shrikant M. Joshi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 15:31
CPC Classifications
F; F28; F28F; F28F13/00; F28F13/06; F28F13/12; F28D; F28D1/00; F28D1/02; F28D1/03; F28D1/0308; F28D1/0325; F28D1/0333; F28F3/00; F28F3/02; F28F3/025; F28F3/027; Y; Y10; Y10S; Y10S165/00; Y10S165/51; Y10S165/529; Y10S165/53; Y10S165/916
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
167 words
An oil cooler for transferring heat from oil within the cooler to fluid without the cooler, comprising: a pair of elongated plates secured together at their margins and spaced from one another between the margins to form an oil flow path, the plates having inlet and outlet ports to define the general direction of oil flow, an oil center between the plates in thermal contact with the plates and in the oil flow path for transferring heat from the oil to the plates, the oil center comprising a corrugated metal sheet having a plurality of substantially plane fins in side-by-side relationship and joined at bends wherein the bends make the thermal contact with the plates, and a plurality of louvers in each fin for creating turbulence in the oil flow and defining openings in the fins, wherein the oil center is disposed with the direction of the fin planes transverse to the general direction of flow so that the oil passes through the openings of the fins.
Claim 2
Dependent Claim
167 words
An oil cooler for transferring heat from oil within the cooler to fluid without the cooler, comprising: a pair of elongated plates secured together at their margins and spaced from one another between the margins to form an oil flow path, the plates having inlet and outlet ports to define the general direction of oil flow, an oil center between the plates in thermal contact with the plates and in the oil flow path for transferring heat from the oil to the plates, the oil center comprising a corrugated metal sheet having a plurality of substantially plane fins in side-by-side relationship and joined at bends wherein the bends make the thermal contact with the plates, and a plurality of louvers in each fin for creating turbulence in the oil flow and defining openings in the fins, wherein the oil center is disposed with the direction of the fin planes transverse to the general direction of flow so that the oil passes through the openings of the fins.
Claim 3
Dependent Claim
27 words
The invention as defined in claim 1 wherein the oil center is disposed with the direction of the fin planes parallel to the general direction of flow.
Claim 4
Dependent Claim
43 words
The invention as defined in claim 1 wherein the oil center is disposed with the direction of the fin planes parallel to the general direction of flow and the louvers project from the fin planes at an angle on the order of 30°.
Claim 5
Dependent Claim
23 words
The invention as defined in claim 1 wherein the louvers project from the fin planes at an angle on the order of 70°.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-08-06 | 1994-02-05 | 1994-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-08-06 | 1998-02-05 | 1998-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-08-06 | 2002-02-05 | 2002-08-07 | $7700.00 | Window Closed / Lapsed |