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US4134380A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automobile oil pan assembly
Assignee: Toyota Motor Corp
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Filing: 1977-01-18
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Granted: 1979-01-16
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Expires: 1997-01-18
Abstract
Abstract An oil pan assembly for an automotive vehicle is formed with an oil pan which is divided by a partition wall into a first and a second chamber. Oil is pumped by an oil pump from the first chamber into the engine of the vehicle through a pipe including an oil strainer. The partition wall is provided with a temperature responsive valve which closes when temperature of the oil is below a predetermined level to cut off flow communication between the second chamber and the first chamber. Thus, with the valve closed, all the oil going to the vehicle engine is drawn from the first chamber. When the temperature of the oil rises above a predetermined level, the temperature responsive valve opens thereby permitting oil circulation from the second chamber into the first chamber.
Inventors
- 👤 Takao Niwa
- 👤 Yasushi Sato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:22
CPC Classifications
F; F01; F01M; F01M11/00; F01M11/06; F01M11/0004; F01M5/00; F01M5/005; F01M5/02; F01M5/021; F01M2005/023; F01M2011/0037; F01M2011/0045
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
213 words
An oil pan assembly for an internal combustion engine comprising: means defining an oil pan containing oil therein; partition wall means dividing said oil pan into a first oil pan chamber and a second oil pan chamber; oil pump means; means including a strainer communicating said first oil pan chamber with said oil pump means, said oil pump means operating to deliver oil from said first oil pan chamber to an internal combustion engine; and temperature responsive valve means located in said partition wall means for opening and closing flow communication between said first and second oil pan chambers; said valve means being set to remain closed to block flow communication between said first and second oil pan chambers when the temperature of oil within said oil pan is below a predetermined temperature level thereby causing only oil from said first oil pan chamber to be drawn by said pump means for delivery to said internal combustion engine; said valve means operating to open to establish flow communication between said first and said second oil pan chambers when the temperature of oil within said oil pan rises above said predetermined temperature level thereby to permit oil from said second chamber to flow into said first chamber for circulation to said internal combustion engine.
Claim 2
Dependent Claim
213 words
An oil pan assembly for an internal combustion engine comprising: means defining an oil pan containing oil therein; partition wall means dividing said oil pan into a first oil pan chamber and a second oil pan chamber; oil pump means; means including a strainer communicating said first oil pan chamber with said oil pump means, said oil pump means operating to deliver oil from said first oil pan chamber to an internal combustion engine; and temperature responsive valve means located in said partition wall means for opening and closing flow communication between said first and second oil pan chambers; said valve means being set to remain closed to block flow communication between said first and second oil pan chambers when the temperature of oil within said oil pan is below a predetermined temperature level thereby causing only oil from said first oil pan chamber to be drawn by said pump means for delivery to said internal combustion engine; said valve means operating to open to establish flow communication between said first and said second oil pan chambers when the temperature of oil within said oil pan rises above said predetermined temperature level thereby to permit oil from said second chamber to flow into said first chamber for circulation to said internal combustion engine.
Claim 3
Dependent Claim
39 words
An assembly according to claim 1 wherein said partition wall means consist of an upper wall member extending substantially parallel with the level of oil in said oil pan and a side member extending in a substantially vertical direction.
Claim 4
Dependent Claim
22 words
An assembly according to claim 2 wherein said upper member is formed with an opening therein said opening having a given area.
Claim 5
Dependent Claim
24 words
An assembly according to claim 2 wherein said temperature responsive valve means are mounted in said side wall member of said partition wall means.
Claim 6
Dependent Claim
17 words
An assembly according to claim 4 wherein said temperature responsive valve means is a thermostatic type valve.
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) | 1982-01-15 | 1982-07-17 | 1983-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-15 | 1986-07-17 | 1987-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-15 | 1990-07-17 | 1991-01-16 | $7700.00 | Window Closed / Lapsed |