US4023137A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for indicating the oil level in a combustion engine crankcase
Assignee: Volvo Penta AB
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Filing: 1975-07-28
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Granted: 1977-05-10
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Expires: 1995-07-28
Abstract
Abstract A device for indicating the oil level of an internal combustion engine crankcase comprises a crankcase oil level sensor electrically connected to a change-over switch provided in the electrical connection between the engine fuel tank level sensor and its fuel indicator, thereby allowing the same in indicator to be used for reading fuel and oil level selectively. The change-over switch preferably forms part of the ignition switch so that oil level reading is prevented when the engine is running.
Inventors
- 👤 Ake Gunnar Olsbo
- 👤 Dag Anders Windt
- 👤 Lars-Erik Lundberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:59
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/22; G01F23/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
149 words
A device for indicating the oil level in an internal combustion engine crankcase of a motor vehicle, comprising an indicator, a first electrical sensor for detecting fuel level in said vehicle, a second electrical sensor for detecting oil level in said crankcase, an ignition lock switch for said internal combustion engine, the ignition lock switch having at least one position in which the engine ignition is switched on and at least one position in which the engine ignition is switched off, and means responsive to the position of said ignition lock switch to connect said first sensor to said indicator when the ignition lock switch assumes an ignition-on position and to connect said second sensor to said indicator only when the ignition lock switch assumes an ignition-off position, whereby said indicator indicates fuel level when the engine is running and oil level only when the engine is not running.
Claim 2
Independent Claim
149 words
A device for indicating the oil level in an internal combustion engine crankcase of a motor vehicle, comprising an indicator, a first electrical sensor for detecting fuel level in said vehicle, a second electrical sensor for detecting oil level in said crankcase, an ignition lock switch for said internal combustion engine, the ignition lock switch having at least one position in which the engine ignition is switched on and at least one position in which the engine ignition is switched off, and means responsive to the position of said ignition lock switch to connect said first sensor to said indicator when the ignition lock switch assumes an ignition-on position and to connect said second sensor to said indicator only when the ignition lock switch assumes an ignition-off position, whereby said indicator indicates fuel level when the engine is running and oil level only when the engine is not running.
References Cited (Backward Citations)
CA590498A
Cited
US3238518A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-05-09 | 1980-11-08 | 1981-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-09 | 1984-11-08 | 1985-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-09 | 1988-11-08 | 1989-05-10 | $7700.00 | Window Closed / Lapsed |