Patent US3929645A successfully refreshed from Google Patents.
US3929645A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filtering and mixing apparatus
Assignee: Cummins Inc
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Filing: 1974-05-24
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Granted: 1975-12-30
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Expires: 1994-05-24
Abstract
Abstract During servicing, used lubricating oil is pumped from the sump of a compression ignition engine crankcase and mixed with fuel oil from a supply tank for the engine in a ratio of approximately three parts fuel oil to one part used lubricating oil. This mixture is passed through a filter and discharged into the supply tank at a concentration not exceeding 5% lubricating oil so that the filtered used lubricating oil is effectively mixed for burning with the fuel in the engine.
Inventors
- 👤 William G Bugelski
- 👤 Jr Robert E Teasley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:53
CPC Classifications
F; F02; F02M; F02M25/00; F01; F01M; F01M11/00; F01M11/04; F01M11/0458; F01M2011/0466; F01M2011/0475
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
94 words
A SYSTEM FOR ADDITION OF USED LUBRICATING OIL TO FUEL OIL BURNED BY A COMPRESSION IGNITION ENGINE, SAID SYSTEM COMPRISING: MEANS FOR EXTRACTING USED LUBRICATING OIL FROM SAID COMPRESSION IGNITION ENGINE; MEANS FOR MIXING FUEL OIL WITH SAID EXTRACTED LUBRICATING OIL AND DISCHARGING THE MIXTURE OF FUEL OIL AND USED LUBRICATING OIL FROM A COMMON OUTLET; A FILTER HAVING AN INLET CONNECTED TO THE OUTLET OF SAID MIXING MEANS FOR FILTERING CONTAMINATES FROM SAID MIXTURE; AND, MEANS FOR ADDING SAID MIXTURE TO A TANK OF FUEL OIL FOR USE BY SAID COMPRESSION IGNITION ENGINE.
Claim 2
Independent Claim
94 words
A SYSTEM FOR ADDITION OF USED LUBRICATING OIL TO FUEL OIL BURNED BY A COMPRESSION IGNITION ENGINE, SAID SYSTEM COMPRISING: MEANS FOR EXTRACTING USED LUBRICATING OIL FROM SAID COMPRESSION IGNITION ENGINE; MEANS FOR MIXING FUEL OIL WITH SAID EXTRACTED LUBRICATING OIL AND DISCHARGING THE MIXTURE OF FUEL OIL AND USED LUBRICATING OIL FROM A COMMON OUTLET; A FILTER HAVING AN INLET CONNECTED TO THE OUTLET OF SAID MIXING MEANS FOR FILTERING CONTAMINATES FROM SAID MIXTURE; AND, MEANS FOR ADDING SAID MIXTURE TO A TANK OF FUEL OIL FOR USE BY SAID COMPRESSION IGNITION ENGINE.
Claim 3
Dependent Claim
21 words
A system as in claim 1 wherein said mixing means mixes a greater proportion of fuel oil than used lubricating oil.
Claim 4
Dependent Claim
21 words
A system as in claim 2 wherein the ratio of fuel oil to used lubricating oil is approximately 3 to 1.
Claim 5
Dependent Claim
68 words
A system as in claim 1 wherein said extracting and mixing means comprises: a first pump having an inlet for receiving used lubricating oil and an outlet; a second pump having an inlet for connection to a source of fuel oil and an outlet; and, means receiving the output of said first and second pump for mixing said lubricating and fuel oil for discharge from said common outlet.
Claim 6
Dependent Claim
30 words
A system as in claim 4 further comprising a motor having a common double ended output shaft, the ends of said output shaft being connected to and driving said pumps.
Claim 7
Dependent Claim
32 words
A system as in claim 5 wherein said pumps have a predetermined flow output ratio so that a greater proportion of fuel oil passes into said mixing means than said lubricating oil.
Claim 8
Dependent Claim
36 words
A system as in claim 6 wherein said pumps have substantially equal capacities and said first pump has a restricting orifice in series flow connection thereby reducing the relative flow output of the said first pump.
Claim 9
Dependent Claim
99 words
A system as in claim 1 for in situ addition of used lubricating oil from the sump of a compression ignition engine to the fuel oil in a fuel oil tank for use by said compression ignition engine, said system further comprising: an elongated flexible conduit connected to said extracting means and being releasably connected to sump section of said compression ignition engine; a second elongated flexible conduit connected to said mixing means and insertable in said fuel oil tank; and, a third elongated flexible conduit connected to the outlet of said filter thereby forming said mixture adding means.
Claim 10
Dependent Claim
26 words
A system as in claim 1 wherein said lubricating oil is added to said fuel oil in a concentration of up to approximately 5% by volume.
Claim 11
Dependent Claim
19 words
A system as in claim 1 wherein said filter includes a plurality of filter elements in parallel flow relationship.
Claim 12
Dependent Claim
31 words
A system as in claim 1 wherein: said filter comprises an upright cylindrical outer housing; and, the common outlet of said mixing means is connected to the inlet of said filter.
Claim 13
Dependent Claim
73 words
A system as in claim 11 wherein said extracting and mixing means comprises a first pump having an inlet receiving used lubricating oil and an outlet, a second pump having an outlet and a mixing means receiving the output of said pumps and connected to said filter inlet; said system further comprises an electric motor mounted on said filter housing and having comMon double ended output shaft driving said first and second pumps.
Claim 14
Dependent Claim
52 words
A system as in claim 12 wherein said mixing means comprises an elongated tube receiving the output of said first and second pumps and connected to said filter inlet, said tube having spiral auger flights on its interior walls for promoting mixing of said fuel oil and lubricating oil in said tube.
Claim 15
Dependent Claim
25 words
A system as in claim 13 further comprising pressure gages connected to the inlet and outlet of said filter for indicating the pressure drop thereacross.
Claim 16
Dependent Claim
95 words
A system as in claim 12 for addition of used lubricating oil from the sump of a compression ignition engine to a fuel oil tank supplying fuel oil to said engine wherein said system further comprises: a first flexible hose extending from the inlet of said first pump and being releasably connected to the sump portion of said crankcase; a second flexible hose extending from the inlet to said second pump and insertable in said fuel oil tank; and, a third flexible hose extending from the outlet of said filter to said fuel oil tank.
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) | 1978-12-29 | 1979-06-30 | 1979-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-29 | 1983-06-30 | 1983-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-29 | 1987-06-30 | 1987-12-30 | $7700.00 | Window Closed / Lapsed |