Patent US3724599A successfully refreshed from Google Patents.
US3724599A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine oil pan
Assignee: Motors Liquidation Co
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Filing: 1971-11-26
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Granted: 1973-04-03
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Expires: 1991-11-26
Abstract
Abstract An engine oil pan is provided with a tear strip to separate the pan into two portions for ease of removal of the pan when its engine is installed in a vehicle. A flexible plastic liner is used upon reinstallation of the separated portions of the pan to provide an oil containing structure. The liner may also act as a gasket and may include a thickened portion to fill the gap caused by removal of the tear strip.
Inventors
- 👤 W Heidacker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:27
CPC Classifications
F; F02; F02F; F02F7/00; F02F7/0043; F02F7/0046; F01; F01M; F01M11/00; F01M11/0004; F01M2011/0054; F01M2011/0062
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
105 words
An engine oil pan comprising an integral formed sheet metal body adapted to be secured to the lower portion of an engine cylinder block or the like to receive and retain lubricant, said sheet metal body having a strip thereof extending transversely across and around the central portion of said body and dividing said body into front and rear portions, said strip having its edge connections with said front and rear portions weakened by embossing or the like to permit subsequent removal of said strip by tearing to separate said body portions for removal from such engine while such engine is installed in a vehicle.
Claim 2
Dependent Claim
105 words
An engine oil pan comprising an integral formed sheet metal body adapted to be secured to the lower portion of an engine cylinder block or the like to receive and retain lubricant, said sheet metal body having a strip thereof extending transversely across and around the central portion of said body and dividing said body into front and rear portions, said strip having its edge connections with said front and rear portions weakened by embossing or the like to permit subsequent removal of said strip by tearing to separate said body portions for removal from such engine while such engine is installed in a vehicle.
Claim 3
Dependent Claim
60 words
An integral sheet metal engine oil pan having spaced front and rear portions and a transverse tear strip connecting said portions and capable of being removed from the main body of the pan while it is installed on an engine in a vehicle to separate said oil pan portions for ease of removal of the oil pan from such engine.
Claim 4
Dependent Claim
60 words
An integral sheet metal engine oil pan having spaced front and rear portions and a transverse tear strip connecting said portions and capable of being removed from the main body of the pan while it is installed on an engine in a vehicle to separate said oil pan portions for ease of removal of the oil pan from such engine.
Claim 5
Dependent Claim
38 words
An engine oil pan assembly comprising separate front and rear sheet metal portions and a flexible impervious inner liner supported by said front and rear portions upon their being secured to an engine cylinder block or the like.
Claim 6
Dependent Claim
38 words
An engine oil pan assembly comprising separate front and rear sheet metal portions and a flexible impervious inner liner supported by said front and rear portions upon their being secured to an engine cylinder block or the like.
Claim 7
Dependent Claim
55 words
The combination of claim 3 wherein said sheet metal front and rear portions include flanges adapted to be secured to such cylinder block and said inner liner includes a flanged edge engagable by the flanges of said front and rear portions and adapted to act as a gasket betweEn said flanges and such cylinder block.
Claim 8
Dependent Claim
36 words
The combination of claim 3 wherein said front and rear portions are spaced, leaving a gap as installed upon such cylinder block, said assembly including means to bridge said gap and prevent damage to said liner.
Claim 9
Dependent Claim
38 words
The combination of claim 5 wherein said gap bridging means comprises a thickened portion of said flexible liner, said thickened portion having slots along its edges to receive the sheet metal edges of said front and rear portions.
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) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |