US3793997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine liquid flow indicating device means
Assignee: Individual
•
Filing: 1971-12-15
•
Granted: 1974-02-26
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Expires: 1991-12-15
Abstract
Abstract Liquid flow sensors connected to an engine or power means requiring liquid cooling. Sensors measure liquid flow velocity and volume factors on a visual flow gauge in increments of low, medium and high volume readouts in conjunction with a warning means, for liquid flow and pressure indication.
Inventors
- 👤 P Banner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:48
CPC Classifications
G; G01; G01P; G01P13/00; G01P13/0006; G01P13/0026; G01P13/0033; G01F; G01F1/00; G01F1/05; G01F1/20; G01F1/28; G01P5/00; G01P5/02; G01P5/04
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
96 words
A monitoring device for determining the condition of an engine cooling system comprising: An engine having a liquid cooling system; a sensor body mounted in liquid communication with said cooling system; a flow responsive element mounted in said sensor body; a first sensing means actuated by said flow responsive element for producing an electrical signal indicative of no flow of engine coolant; a second sensing means actuated by said flow responsive element for producing an electrical signal indicative of the flow rate of engine coolant; and indicator means attached to said first and second sensing means.
Claim 2
Dependent Claim
96 words
A monitoring device for determining the condition of an engine cooling system comprising: An engine having a liquid cooling system; a sensor body mounted in liquid communication with said cooling system; a flow responsive element mounted in said sensor body; a first sensing means actuated by said flow responsive element for producing an electrical signal indicative of no flow of engine coolant; a second sensing means actuated by said flow responsive element for producing an electrical signal indicative of the flow rate of engine coolant; and indicator means attached to said first and second sensing means.
Claim 3
Dependent Claim
25 words
Apparatus as in claim 1 and further including a pressure sensing means in the sensor body and indicating means connected to said pressure sensing means.
Claim 4
Dependent Claim
29 words
Apparatus as in claim 1 in which the sensor body is in the form of a unitary structure having a single threaded fitting for attachment into the cooling system.
Claim 5
Dependent Claim
29 words
Apparatus as in claim 1 in which the sensor body is in the form of a unitary structure having inlet and oUtlet parts for attachment into the cooling system.
Claim 6
Dependent Claim
19 words
Apparatus as in claim 1 in which the engine is a marine engine having a sea water cooling system.
Claim 7
Dependent Claim
42 words
Apparatus as in claim 1 wherein the indicator means attached to the flow responsive element includes dial means for continuously indicating the coolant flow, said dial means being calibrated to show low normal and high readings of coolant flow for said engine.
Claim 8
Dependent Claim
31 words
Apparatus as in claim 1 in which the indicator means is mounted at a point remote from the engine and said indicator means includes warning lights and an audio alarm means.
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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) | 1977-02-25 | 1977-08-27 | 1978-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-25 | 1981-08-27 | 1982-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-25 | 1985-08-27 | 1986-02-26 | $7700.00 | Window Closed / Lapsed |