Patent US5070831A successfully refreshed from Google Patents.
US5070831A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil change system and method
Assignee: Individual
•
Filing: 1991-02-22
•
Granted: 1991-12-10
•
Expires: 2011-02-22
Abstract
Abstract An internal combustion engine oil change system including an oil filter equipped with a check valve fill fitting. During an oil change, new oil is supplied to the engine through the check valve fitting, thus both filling the filter with oil and back flushing the engine's oil pump. An oil supply mechanism including a tank adapted to hold an appropriate pre-measured quantity of oil under air pressure is provided. A flexible hose with a quick disconnect female coupling connects the tank to the filter fitting for delivering oil from the tank through the filter into the engine.
Inventors
- 👤 Smokey Yunick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:50
CPC Classifications
F; F01; F01M; F01M11/00; F01M11/03; F01M11/04; F01M11/0458
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
128 words
An internal combustion engine oil filtering device comprising: a) a tabular housing having spaced closed and mounting ends; b) the mounting end including a mounting surface for mounting the filtering device to an engine; c) the mounting end including inlet and outlet openings and being otherwise imperforate; d) the openings being for communication with an engine's lubrication system; e) a filter located within the housing; f) the closed end including a loading opening and being otherwise imperforate; g) a loading fitting connected to the housing in fluid communication with the loading opening, the loading fitting being adapted to receive lubrication oil for filling said device and supplying oil to a connected engine; and, h) said fitting including a check valve means for preventing oil from exiting said device.
Claim 2
Dependent Claim
128 words
An internal combustion engine oil filtering device comprising: a) a tabular housing having spaced closed and mounting ends; b) the mounting end including a mounting surface for mounting the filtering device to an engine; c) the mounting end including inlet and outlet openings and being otherwise imperforate; d) the openings being for communication with an engine's lubrication system; e) a filter located within the housing; f) the closed end including a loading opening and being otherwise imperforate; g) a loading fitting connected to the housing in fluid communication with the loading opening, the loading fitting being adapted to receive lubrication oil for filling said device and supplying oil to a connected engine; and, h) said fitting including a check valve means for preventing oil from exiting said device.
Claim 3
Dependent Claim
46 words
The filtering device of claim 1 wherein said loading fitting is adapted to be removably received into said loading opening via screw-type threads located on both the loading fitting and the loading opening to enable the loading fitting to be transferable to a new filtering device.
Claim 4
Dependent Claim
98 words
A disposable oil filter comprising: a) a tubular housing; b) a mounting surface for mounting the filter to an engine for filtering the engine's oil; c) a plurality of inlet holes arranged circularly and located within the mounting surface; d) an outlet hole located centrally among the inlet holes; e) a filter located within the housing; f) a threaded loading opening; and, g) a removable, threaded loading fitting including a check valve means for being received within the loading opening, the fitting being adapted to receive oil for filling the filter while preventing oil from exiting the filter.
Claim 5
Dependent Claim
98 words
A disposable oil filter comprising: a) a tubular housing; b) a mounting surface for mounting the filter to an engine for filtering the engine's oil; c) a plurality of inlet holes arranged circularly and located within the mounting surface; d) an outlet hole located centrally among the inlet holes; e) a filter located within the housing; f) a threaded loading opening; and, g) a removable, threaded loading fitting including a check valve means for being received within the loading opening, the fitting being adapted to receive oil for filling the filter while preventing oil from exiting the filter.
Claim 6
Dependent Claim
106 words
An oil filter comprising: a) a tubular housing; b) a mounting surface for mounting the filter to an engine for filtering the engine's oil; c) a plurality of inlet holes arranged circularly and located within the mounting surface; d) and outlet hole located centrally among the inlet holes; e) a filter located within the housing; f) a loading opening; g) a loading fitting connected to the housing in fluid communication with the loading opening, the loading fitting being adapted to receive oil for filling the filter and an engine crankcase; and, h) the fitting including a check valve means for preventing oil from exiting the filter.
Claim 7
Dependent Claim
106 words
An oil filter comprising: a) a tubular housing; b) a mounting surface for mounting the filter to an engine for filtering the engine's oil; c) a plurality of inlet holes arranged circularly and located within the mounting surface; d) and outlet hole located centrally among the inlet holes; e) a filter located within the housing; f) a loading opening; g) a loading fitting connected to the housing in fluid communication with the loading opening, the loading fitting being adapted to receive oil for filling the filter and an engine crankcase; and, h) the fitting including a check valve means for preventing oil from exiting the filter.
Claim 8
Independent Claim
74 words
A method of changing and engine's used oil comprising: a) draining all used oil from an engine; b) removing a used oil filter; c) mounting a new oil filter in place of the used oil filter; d) filling the new oil filter and supplying new oil to the crank case by supplying the new oil to the filter and crankcase by flowing oil through a check valve equipped fitting connected to the new filter.
Claim 9
Independent Claim
74 words
A method of changing and engine's used oil comprising: a) draining all used oil from an engine; b) removing a used oil filter; c) mounting a new oil filter in place of the used oil filter; d) filling the new oil filter and supplying new oil to the crank case by supplying the new oil to the filter and crankcase by flowing oil through a check valve equipped fitting connected to the new filter.
Claim 10
Independent Claim
80 words
A method of changing an engine's used oil comprising: a) draining all used oil from an engine; b) removing a used oil filter; c) removing a threaded check valve equipped fitting from a threaded loading opening located on the used filter; d) mounting a new oil filter in place of the used filter; e) mounting the fitting into a threaded loading opening located on the new oil filter; f) filling the new oil filter with new oil via the fitting.
Claim 11
Independent Claim
80 words
A method of changing an engine's used oil comprising: a) draining all used oil from an engine; b) removing a used oil filter; c) removing a threaded check valve equipped fitting from a threaded loading opening located on the used filter; d) mounting a new oil filter in place of the used filter; e) mounting the fitting into a threaded loading opening located on the new oil filter; f) filling the new oil filter with new oil via the fitting.
Claim 12
Dependent Claim
32 words
The method of claim 6 including the step of continuing to flow oil via the fitting after the filter has been filled until the engine has an appropriate quantity of new oil.
Claim 13
Dependent Claim
42 words
The method of claim 6 including the steps of connecting an oil supply mechanism to the fitting, placing a pre-measured quantity of new oil in the mechanism; and pressurizing the mechanism to force the new oil into the filter and the engine.
References Cited (Backward Citations)
US3682308A
Cited
US4094293A
Cited
US4359140A
Cited
US4433656A
Cited
US4479468A
Cited
US4524733A
Cited
US4703727A
Cited
US4672932A
Cited
US4875551A
Cited
US4825826A
Cited
US4909205A
Cited
US4915852A
Cited
US5018491A
Cited
US4951784A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-12-09 | 1995-06-10 | 1995-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-12-09 | 1999-06-10 | 1999-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-12-09 | 2003-06-10 | 2003-12-10 | $7700.00 | Window Closed / Lapsed |