Patent US3071494A successfully refreshed from Google Patents.
Patent US3765386A successfully refreshed from Google Patents.
US3765386A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anti-pollution device for and method of removing oil from air vented from the crankcase of an internal combustion engine and returning the oil to the crankcase
Assignee: Individual
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Filing: 1971-06-16
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Granted: 1973-10-16
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Expires: 1991-06-16
Abstract
Abstract An anti-pollution device for and a method of removing oil from air vented from the crankcase of an internal combustion engine and returning the oil to the crankcase. The present device includes an elongated casing packed with wire mesh. At one end is an inlet connectible to the PCV valve on the crankcase or valve cover of an internal combustion engine and at the other end is an outlet connectible to the intake manifold of the engine. An oil detection and final filter is provided near or at the outlet end of the casing. A drain outlet for oil removed from oil laden air drawn through the wire mesh is provided including a check valve which is closed during operation of the engine and which is open for oil drainage purposes when the engine is shut off. The use of the present device and method substantially decreases carbon monoxide and other exhaust pipe emissions and lowers fouling of spark plugs to the extent of the oil removed.
Inventors
- 👤 F Ottofy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:01
CPC Classifications
F; F01; F01M; F01M13/00; F01M13/04; Y; Y10; Y10S; Y10S55/00; Y10S55/19
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
216 words
A device for removing oil from oil laden air vented from the crankcase of an internal combustion engine and returning collected oil to the crankcase, said device being adapted for mounting between the PCV valve, intake manifold, and crankcase of the engine, said device comprising a casing having an inlet, an outlet, and an oil drain, means connecting the inlet of the device to the outlet of the PCV valve, means connecting the outlet of the device to the intake manifold of the engine, means for connecting the oil drain to the crankcase of the engine, filter means within the casing between the inlet and outlet through which the oil laden air from the PCV valve must pass for removing oil from the air as it passes therethrough, and valve means in the oil drain which valve means is operated to close the drain in response to the passage of the air through the device, and open the drain when there is no such passage of air as when the engine is not running, whereby oil is removed from the oil laden air by the filter means and clean air is directed to the intake manifold when the engine is running, and the removed oil is returned to the crankcase when the engine is not running.
Claim 2
Independent Claim
216 words
A device for removing oil from oil laden air vented from the crankcase of an internal combustion engine and returning collected oil to the crankcase, said device being adapted for mounting between the PCV valve, intake manifold, and crankcase of the engine, said device comprising a casing having an inlet, an outlet, and an oil drain, means connecting the inlet of the device to the outlet of the PCV valve, means connecting the outlet of the device to the intake manifold of the engine, means for connecting the oil drain to the crankcase of the engine, filter means within the casing between the inlet and outlet through which the oil laden air from the PCV valve must pass for removing oil from the air as it passes therethrough, and valve means in the oil drain which valve means is operated to close the drain in response to the passage of the air through the device, and open the drain when there is no such passage of air as when the engine is not running, whereby oil is removed from the oil laden air by the filter means and clean air is directed to the intake manifold when the engine is running, and the removed oil is returned to the crankcase when the engine is not running.
Claim 3
Dependent Claim
110 words
The device of claim 1 wherein the valve means further comprises a lower ball support plate having an aperture therethrough, an upper plate spaced from the lower plate and closer to the path of moving air through the casing, a ball valve between the plates, the upper plate having an aperture therethrough with a valve seat for the ball valve at the opening of its aperture, whereby the passage of air through the casing pulls the ball valve into the valve seat to close the oil drain, and when there is no such passage of air the ball valve is allowed to drop from the seat to open the drain.
Claim 4
Dependent Claim
129 words
The device of claim 1 wherein the casing is generally tubular in shape and of decreasing cross section from one of its ends to the other, the inlet being at one end and the outlet at the other, said casing being adapted for mounting generally horizontally in the engine compartment, said oil drain being mounted to depend from the casing near its end of greater cross section, whereby as air moves generally horizontally through the filter medium from the inlet to the outlet, the oil removed by the filter means drains downwardly in a direction normal to the flow of air and ultimately to the oil drain such that the upper portion of the filter means remains relatively oil free as the air passes therethrough for greater filtering efficiency.
Claim 5
Dependent Claim
39 words
The device of claim 1 incLuding a second filter adjacent the outlet end of said casing means through which the air must pass for determining presence of oil in the air at the exhaust end of the casing means.
Claim 6
Dependent Claim
17 words
The device of claim 1 wherein the filter means comprises metal mesh packed in said casing means.
Claim 7
Independent Claim
204 words
A device for removing oil from oil laden air vented from the crankcase of an internal combustion engine and returning collected oil to the crankcase, said device comprising a casing having an inlet, an outlet, and an oil drain, means for conducting oil laden air from the crankcase of the engine to the input, means for conducting the filtered air from the output of the device to the intake manifold of the engine, means for connecting the oil drain to the crankcase of the engine, filter means within the casing between the inlet and outlet through which the oil laden air from the crankcase must pass for removing oil from the air as it passes therethrough, and valve means in the oil drain which valve means is operated to close the drain in response to the passage of the air through the device, and open the drain when there is no such passage of air as when the engine is not running, whereby oil is removed from the oil laden air by the filter means and clean air is directed to the intake manifold when the engine is running, and the removed oil is returned to the crankcase when the engine is not running.
Claim 8
Independent Claim
204 words
A device for removing oil from oil laden air vented from the crankcase of an internal combustion engine and returning collected oil to the crankcase, said device comprising a casing having an inlet, an outlet, and an oil drain, means for conducting oil laden air from the crankcase of the engine to the input, means for conducting the filtered air from the output of the device to the intake manifold of the engine, means for connecting the oil drain to the crankcase of the engine, filter means within the casing between the inlet and outlet through which the oil laden air from the crankcase must pass for removing oil from the air as it passes therethrough, and valve means in the oil drain which valve means is operated to close the drain in response to the passage of the air through the device, and open the drain when there is no such passage of air as when the engine is not running, whereby oil is removed from the oil laden air by the filter means and clean air is directed to the intake manifold when the engine is running, and the removed oil is returned to the crankcase when the engine is not running.
Claim 9
Independent Claim
228 words
A device for removing oil from oil laden air vented from the crankcase of an internal combustion engine and returning collected oil to the crankcase, said device comprising a casing of generally tubular shape and of decreasing cross section from one of its ends to the other, and having an inlet at one end, an outlet at the other end, and an oil drain depending from the casing near its end of greater cross section, said casing being adapted for mounting generally horizontally in the engine compartment, means conducting the oil laden air from the crankcase of the engine to the input of the device, means conducting the filtered air from the output of the device to the intake manifold of the engine, means for connecting the oil drain to the crankcase of the engine, filter means within the casing between the inlet and outlet through which the oil laden air from the crankcase must pass for removing oil from the air as it passes therethrough, whereby as air moves generally horizontally through the filter media from the inlet to the outlet, the oil removed by the filter means drains downwardly in a direction normal to the flow of air and ultimately to the oil drain such that the upper portion of the filter means remains relatively oil free as the air passes therethrough for greater filtering efficiency.
Claim 10
Independent Claim
228 words
A device for removing oil from oil laden air vented from the crankcase of an internal combustion engine and returning collected oil to the crankcase, said device comprising a casing of generally tubular shape and of decreasing cross section from one of its ends to the other, and having an inlet at one end, an outlet at the other end, and an oil drain depending from the casing near its end of greater cross section, said casing being adapted for mounting generally horizontally in the engine compartment, means conducting the oil laden air from the crankcase of the engine to the input of the device, means conducting the filtered air from the output of the device to the intake manifold of the engine, means for connecting the oil drain to the crankcase of the engine, filter means within the casing between the inlet and outlet through which the oil laden air from the crankcase must pass for removing oil from the air as it passes therethrough, whereby as air moves generally horizontally through the filter media from the inlet to the outlet, the oil removed by the filter means drains downwardly in a direction normal to the flow of air and ultimately to the oil drain such that the upper portion of the filter means remains relatively oil free as the air passes therethrough for greater filtering efficiency.
Claim 11
Dependent Claim
51 words
The device of claim 7 further comprising valve means in the oil drain which valve means is operated to close the drain in response to the passage of air through the device and open the drain when there is no such passage of air as when the engine is not running.
Claim 12
Dependent Claim
37 words
The device of claim 7 including a second filter adjacent the outlet end of said casing through which the air must pass for determining presence of oil in the air at the exhaust end of the casing.
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) | 1976-10-15 | 1977-04-16 | 1977-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-15 | 1981-04-16 | 1981-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-15 | 1985-04-16 | 1985-10-16 | $7700.00 | Window Closed / Lapsed |