US3590953A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine oil pan
Assignee: Caterpillar Inc
•
Filing: 1969-04-01
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Granted: 1971-07-06
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Expires: 1989-04-01
Abstract
Abstract An engine oil pan in which oil is scavenged from the pan at selected positions and delivered to a compartment within the pan, from which it is pumped to the machinery which is to be lubricated.
Inventors
- 👤 John C Wellauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:56
CPC Classifications
F; F01; F01M; F01M11/00; F01M11/06; F01M11/062; F01M11/065; F01M1/00; F01M1/12; F01M2001/126
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
106 words
An engine oil pan having an enclosed compartment therein, first scavenging means including a pump drawing oil from the pan outside the compartment and delivering it to the compartment through a diffusor, a pressure relief valve means located entirely within said compartment including means communicating said pressure relief valve means with the pump of said first scavenging means so that pressure fluid in said pump is relieved directly into said compartment when as overpressure condition occurs, said pressure relief valve means being directly actuated by pressure, and second scavenging means including a pump drawing oil from within the compartment for delivery to an engine lubrication system.
Claim 2
Dependent Claim
106 words
An engine oil pan having an enclosed compartment therein, first scavenging means including a pump drawing oil from the pan outside the compartment and delivering it to the compartment through a diffusor, a pressure relief valve means located entirely within said compartment including means communicating said pressure relief valve means with the pump of said first scavenging means so that pressure fluid in said pump is relieved directly into said compartment when as overpressure condition occurs, said pressure relief valve means being directly actuated by pressure, and second scavenging means including a pump drawing oil from within the compartment for delivery to an engine lubrication system.
Claim 3
Dependent Claim
40 words
The engine oil pan of claim 1 wherein said first scavenging means includes at least one scavenging head located in the pan and outside the compartment and said second scavenging means includes at least one scavenging head within the compartment.
Claim 4
Dependent Claim
31 words
The engine oil pan of claim 1 wherein sAid transverse partitions are free of openings and said cover has a single opening therein in the form of a single vent hole.
Claim 5
Dependent Claim
33 words
The engine oil pan of claim 1 wherein said valve means comprises a valve and wherein said diffuser is a parallel plate diffusor comprising a pair of spaced parallel plates in the compartment.
Claim 6
Dependent Claim
118 words
An engine oil pan having an enclosed compartment therein, said compartment being defined by said oil pan and a pair of spaced, transverse partitions and an upper cover secured to the upper edges of the partitions and extending from wall to wall of the pan, first scavenging means including a pump drawing oil from the pan outside the compartment and delivering it to the compartment through a parallel plate diffusor comprising a pair of spaced parallel plates in the compartment, second scavenging means including a pump drawing oil from within the compartment whereby oil may be delivered to an engine lubrication system, and wherein said scavenging means includes scavenging heads located at the extremities of the oil pan.
Claim 7
Dependent Claim
118 words
An engine oil pan having an enclosed compartment therein, said compartment being defined by said oil pan and a pair of spaced, transverse partitions and an upper cover secured to the upper edges of the partitions and extending from wall to wall of the pan, first scavenging means including a pump drawing oil from the pan outside the compartment and delivering it to the compartment through a parallel plate diffusor comprising a pair of spaced parallel plates in the compartment, second scavenging means including a pump drawing oil from within the compartment whereby oil may be delivered to an engine lubrication system, and wherein said scavenging means includes scavenging heads located at the extremities of the oil pan.
Claim 8
Dependent Claim
23 words
The engine oil pan of claim 5 wherein said partitions are free from openings and said cover has a single vent hole therein.
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) | 1974-07-05 | 1975-01-04 | 1975-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-05 | 1979-01-04 | 1979-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-05 | 1983-01-04 | 1983-07-06 | $7700.00 | Window Closed / Lapsed |