US4299307A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil level indicating and refilling device
Assignee: Individual
•
Filing: 1979-06-05
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Granted: 1981-11-10
•
Expires: 1999-06-05
Abstract
Abstract A tube is inserted to a predetermined depth into the dip stick orifice of an internal combustion engine of a vehicle and connected to a small pump to initiate oil circulation in a line between the dip stick orifice and the oil filler tube. A pressure sensitive switch is inserted in this line and held in a normally open position while sufficient pressure is being sensed. When the oil level of the engine falls below the tube, the oil pressure sensed by the oil sensor switch drops and the contacts close lighting an indicator light disposed on the instrument panel of the vehicle. An oil reservoir is positioned above the engine and is connected to the oil filler tube. A valve is disposed between the reservoir and the oil filler tube of the engine and can be operated through a remote control from inside the vehicle. When the oil warning light is actuated, the vehicle operator can actuate the valve to allow a predetermined amount of oil to flow into the engine.
Inventors
- 👤 Nathaniel Scott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:39
CPC Classifications
F; F01; F01M; F01M11/00; F01M11/10; F01M11/12; F01M11/06; F01M11/061
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
122 words
An oil level indicating and refilling device for use on an internal combustion engine, comprising; an auxiliary reservoir for storing oil to replenish the oil supply of said internal combustion engine, said reservoir being mounted over said engine; a connector line containing a normally closed valve, said connector line being connected between said auxiliary reservoir and said internal combustion engine; a sensor connected to the oil pan of said internal combustion engine and including a switch which is actuated upon the oil level in said oil pan falling below a predetermined minimum; a first indicator light connected to said sensor, said indicator light being energized upon closure of said switch; and manual actuation means connected to said valve for opening said valve.
Claim 2
Dependent Claim
122 words
An oil level indicating and refilling device for use on an internal combustion engine, comprising; an auxiliary reservoir for storing oil to replenish the oil supply of said internal combustion engine, said reservoir being mounted over said engine; a connector line containing a normally closed valve, said connector line being connected between said auxiliary reservoir and said internal combustion engine; a sensor connected to the oil pan of said internal combustion engine and including a switch which is actuated upon the oil level in said oil pan falling below a predetermined minimum; a first indicator light connected to said sensor, said indicator light being energized upon closure of said switch; and manual actuation means connected to said valve for opening said valve.
Claim 3
Dependent Claim
94 words
The device of claim 1 wherein said switch is a pressure sensitive switch and said sensor includes a tube disposed in the oil pan of said engine and extending outside of said engine, said tube being connected to a pump and further being connected to said pressure sensitive switch, the opposite end of said tube being disposed in a valve cover of said engine; said indicator light being connected to said pressure sensitive switch for being illuminated when the oil in said oil pan falls below the level of the end of said tube.
Claim 4
Dependent Claim
21 words
The device of claim 2 wherein said tube extends into said oil pan through the dip stick opening of said engine.
Claim 5
Dependent Claim
31 words
The device of claim 3 wherein said pressure sensitive switch also activates an audible alarm when the level of oil in said oil pan falls below the bottom of said tube.
Claim 6
Dependent Claim
27 words
The device of claim 1 and further wherein said auxiliary oil reservoir includes an oil level indicating apparatus for providing an indication of the oil remaining therein.
Claim 7
Dependent Claim
49 words
The device of claim 5 wherein said oil level indicating apparatus includes a float mounted in said reservoir and carrying a movable contact, a plurality of stationary contacts mounted in said reservoir in vertically spaced arrangement, said plurality of stationary contacts being individually contacted by said float mounted contact.
Claim 8
Dependent Claim
83 words
The device of claim 6 wherein one of said stationary contacts is positioned to indicate that said reservoir is full; a first set of contacts mounted on said valve and connected to said valve such that they are operative when said valve is closed, said first set of contacts being in circuit with said one of stationary contacts and further in circuit with a first indicator means for exciting said indicator means when said auxiliary reservoir is full and said valve is closed.
Claim 9
Dependent Claim
84 words
The device of claim 7 wherein a second one of said stationary contacts is positioned to indicate that said reservoir is less than full; a second set of contacts mounted on said valve, said second set of contacts being actuated when said valve is opened, said second set of contacts being in circuit with said second one of said stationary contacts and further in circuit with a second indicator means for indicating when said valve is open and said reservoir is less than full.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-11-09 | 1985-05-11 | 1985-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-09 | 1989-05-11 | 1989-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-09 | 1993-05-11 | 1993-11-10 | $7700.00 | Window Closed / Lapsed |