US3882967A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for level and/or temperature control of liquids
Assignee: Daimler Benz AG
•
Filing: 1973-01-15
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Granted: 1975-05-13
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Expires: 1993-01-15
Abstract
Abstract An installation for controlling the level and/or temperature of liquids such as, for example, engine oil, brake fluid, cooling water, fuel, etc. in vehicles, especially in motor vehicles, with the use of temperature-dependent resistances which are incorporated in sensors whereby one or several sensors are so arranged in the liquid to be controlled and are so connected with each other that with the use of electronic threshold switching devices an unequivocal signal is produced when dropping below a predetermined liquid level and/or when exceeding or dropping below a predetermined temperature.
Inventors
- 👤 Peter Gulla
- 👤 Dieter Schutzenauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:57
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/22; G01F23/24; G01F23/246; G01F23/247; G01K; G01K3/00; G01K3/005; Y; Y10; Y10T; Y10T137/00; Y10T137/7287; Y10T137/7297; Y10T137/7306
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
167 words
An installation for the level and/or temperature control of liquids in vehicles with the use of temperature dependent resistance means, comprising a plurality of sensor means, each of said sensor means including said resisTance means being arranged at predetermined points in the liquid to be controlled which is contained in a vehicle container, at least one electronic threshold switching means, control means responsive to at least operating level and/or temperature parameters of the vehicle for selectively closing switching means for connecting at least one of said sensor means with at least one of said electronic threshold switching means in accordance with predetermined input signal values of the operating parameters for ensuring that an unequivocal signal indicative of level and/or temperature of the liquid is produced by said connected sensor means via said electronic threshold switching means for application to an indicating means and/or controlling means under all operating signal valve parameters of the vehicle irrespective of whether the engine is running or the position of the vehicle.
Claim 2
Dependent Claim
167 words
An installation for the level and/or temperature control of liquids in vehicles with the use of temperature dependent resistance means, comprising a plurality of sensor means, each of said sensor means including said resisTance means being arranged at predetermined points in the liquid to be controlled which is contained in a vehicle container, at least one electronic threshold switching means, control means responsive to at least operating level and/or temperature parameters of the vehicle for selectively closing switching means for connecting at least one of said sensor means with at least one of said electronic threshold switching means in accordance with predetermined input signal values of the operating parameters for ensuring that an unequivocal signal indicative of level and/or temperature of the liquid is produced by said connected sensor means via said electronic threshold switching means for application to an indicating means and/or controlling means under all operating signal valve parameters of the vehicle irrespective of whether the engine is running or the position of the vehicle.
Claim 3
Dependent Claim
35 words
An installation according to claim 1, characterized in that said control means so connects the sensor means with the threshold switching means that an unequivocal signal is produced when dropping below a predetermined liquid level.
Claim 4
Dependent Claim
33 words
An installation according to claim 1, characterized in that said control means so connects the sensor means with the threshold switching means that an unequivocal signal is produced upon exceeding a predetermined temperature.
Claim 5
Dependent Claim
34 words
An installation according to claim 3, characterized in that said control means so connects the sensor means with the threshold switching means that an unequivocal signal is produced when dropping below a predetermined temperature.
Claim 6
Dependent Claim
27 words
An installation according to claim 4, characterized in that said liquid is at least one of engine oil, brake fluid, cooling water, and fuel in motor vehicles.
Claim 7
Dependent Claim
35 words
An installation according to claim 5, characterized in that said control means interconnects at least two of said sensor means with each other and with said electronic threshold switching means to produce the unequivocal signal.
Claim 8
Dependent Claim
32 words
An installation according to claim 1, characterized in that a respective sensor means is so arranged that driving the vehicle along a curve does not exert any influence on the measurement results.
Claim 9
Dependent Claim
27 words
An installation according to claim 7, characterized in that a respective sensor means is so arranged that inclination of vehicle exerts no influence on the measurement results.
Claim 10
Dependent Claim
27 words
An installation according to claim 8, characterized in that a respective sensor means is so arranged that tilting of vehicle exerts no influence on the measurement results.
Claim 11
Dependent Claim
62 words
An installation according to claim 9, wherein engine oil is the liquid, characterized in that with the control of the engine oil, engine speed is an operating parameter and the sensor means are so arranged that predetermined ones of said sensor means are connected with said threshold switching means by said control means in response to predetermined values of engine rotational speed.
Claim 12
Dependent Claim
40 words
An installation according to claim 10, characterized in that with the control of the engine oil, predetermined ones of said sensor means are connected with said threshold switching means by said control means in response to predetermined values of temperature.
Claim 13
Dependent Claim
44 words
An installation according to claim 11, characterized in that with the control of the engine oil, predetermined ones of said sensor means are connected with said threshold switching means by said control means in response to values indicative of ''''engine running'''' and ''''engine standing-still.''''
Claim 14
Dependent Claim
49 words
An installation according to claim 12, characterized in that an oil pump for circulating oil is provided which includes a suction line and a pressure line as well as a by-pass line connected with one of said lines, one of the sensor means being arranged in said by-pass line.
Claim 15
Dependent Claim
38 words
An installation according to claim 13, characterized in that the temperature dependent resistance means of the sensor means serving the temperature measurement has a steep characteristic curve property within The temperature range in which a predetermined temperature lies.
Claim 16
Dependent Claim
36 words
An installation according to claim 14, characterized by said controlling means operable by switching signals produced in a respective threshold switching means for initiating the automatic refilling when the liquid drops below a predetermined liquid level.
Claim 17
Dependent Claim
35 words
An installation according to claim 15, characterized in that said control means so connects that sensor means with the threshold switching means that an unequivocal signal is produced when dropping below a predetermined liquid level.
Claim 18
Dependent Claim
33 words
An installation according to claim 16, characterized in that said control means so connects the sensor means with the threshold switching means that an unequivocal signal is produced upon exceeding a predetermined temperature.
Claim 19
Dependent Claim
34 words
An installation according to claim 16, characterized in that said control means so connects the sensor means with the threshold switching means that an unequivocal signal is produced when dropping below a predetermined temperature.
Claim 20
Dependent Claim
35 words
An installation according to claim 18, characterized in that said control means interconnects at least two of said sensor means with each other and with said electronic threshold switching means to produce the unequivocal signal.
Claim 21
Dependent Claim
27 words
An installation according to claim 1, characterized in that a respective sensor means is so arranged that inclination of vehicle exerts no influence on the measurement results.
Claim 22
Dependent Claim
27 words
An installation according to claim 1, characterized in that a respective sensor means is so arranged that tilting of vehicle exerts no influence on the measurement results.
Claim 23
Dependent Claim
62 words
An installation for the control of engine oil according to claim 1, characterized in that with the control of the engine oil, engine speed is an operating parameter and the sensor means are so arranged that predetermined ones of said sensor means are connected with said threshold switching means by said control means in response to predetermined values of engine rotational speed.
Claim 24
Dependent Claim
40 words
An installation according to claim 1, characterized in that with the control of the engine oil, predetermined ones of said sensor means are connected with said threshold switching means by said control means in response to predetermined values of temperature.
Claim 25
Dependent Claim
44 words
An installation according to claim 1, characterized in that with the control of the engine oil, predetermined ones of said sensor means are connected with said threshold switching means by said control means in response to values indicative of ''''engine running'''' and ''''engine standing-still''''.
Claim 26
Dependent Claim
49 words
An installation according to claim 1, characterized in that an oil pump is provided for circulating oil which includes a suction line and a pressure line as well as a by-pass line connected with one of said lines, one of the sensor means being arranged in said by-pass line.
Claim 27
Dependent Claim
38 words
An installation according to claim 1, characterized in that the temperature dependent resistance means of the sensor means serving the temperature measurement has a steep characteristic curve property within the temperature range in which a perdetermined temperature lies.
Claim 28
Dependent Claim
37 words
An installation according to claim 1, characterized by said controlling means operable by switching signals produced in a respective threshold switching means for initiating the automatic refilling when the liquid level drops below a predetermined liquid level.
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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) | 1978-05-12 | 1978-11-11 | 1979-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-12 | 1982-11-11 | 1983-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-12 | 1986-11-11 | 1987-05-13 | $7700.00 | Window Closed / Lapsed |