US3851333A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spray injection for testing an ultrasonic liquid level detector
Assignee: Individual
•
Filing: 1969-07-31
•
Granted: 1974-11-26
•
Expires: 1989-07-31
Abstract
Abstract An ultrasonic liquid level detector consisting of opposed ultrasonic sources in a glass pipe with a spray adaptor and pump means for simulating operational conditions with adaptors for other styles of ultrasonic probes.
Inventors
- 👤 S Fishman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:17
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/22; G01F23/28; G01F23/296; G01F23/2961; G01F23/2965; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7758; Y10T137/7761
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
127 words
An ultrasonic liquid level detector comprising a glass tube open at both ends, an emitting ultrasonic transducer mounted on the side of the tube having its emitting surface facing the tube interior; a receiving ultrasonic transducer mounted on the side of the tube opposite the emitting transducer and having its receiving surface generally parallel to the emitting surface of the emitting transducer, means for activating the emitting transducer to cause emission of an ultrasonic beam, a liquid spray injector mounted in the tube arranged to direct a liquid spray into the gap between the emitting transducer and the receiving transducer so as to provide a conducting sound path and means for injecting such a spray following any substantial drop in the energy received by the receiving transducer.
Claim 2
Dependent Claim
127 words
An ultrasonic liquid level detector comprising a glass tube open at both ends, an emitting ultrasonic transducer mounted on the side of the tube having its emitting surface facing the tube interior; a receiving ultrasonic transducer mounted on the side of the tube opposite the emitting transducer and having its receiving surface generally parallel to the emitting surface of the emitting transducer, means for activating the emitting transducer to cause emission of an ultrasonic beam, a liquid spray injector mounted in the tube arranged to direct a liquid spray into the gap between the emitting transducer and the receiving transducer so as to provide a conducting sound path and means for injecting such a spray following any substantial drop in the energy received by the receiving transducer.
Claim 3
Dependent Claim
126 words
An ultrasonic liquid level detector comprising a glass tube open at both ends, an emitting ultrasonic transducer mounted on the side of the tube having its emitting surface facing the tube interior; a receiving ultrasonic transducer mounted on the side of the tube opposite the emitting transducer and having its receiving surface generally parallel to the emitting surface of the emitting transducer, means for activating the emitting transducer to cause emission of an ultrasonic beam, a gaseous spray injector mounted in the tube, arranged to direct a gaseous spray into the gap between the emitting transducer and the receiving transducer so as to interrupt any conducting sound path, and means for injecting such spray following any substantial increase in the energy received by the receiving transducer.
Claim 4
Dependent Claim
126 words
An ultrasonic liquid level detector comprising a glass tube open at both ends, an emitting ultrasonic transducer mounted on the side of the tube having its emitting surface facing the tube interior; a receiving ultrasonic transducer mounted on the side of the tube opposite the emitting transducer and having its receiving surface generally parallel to the emitting surface of the emitting transducer, means for activating the emitting transducer to cause emission of an ultrasonic beam, a gaseous spray injector mounted in the tube, arranged to direct a gaseous spray into the gap between the emitting transducer and the receiving transducer so as to interrupt any conducting sound path, and means for injecting such spray following any substantial increase in the energy received by the receiving transducer.
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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) | 1977-11-25 | 1978-05-27 | 1978-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-25 | 1982-05-27 | 1982-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-25 | 1986-05-27 | 1986-11-26 | $7700.00 | Window Closed / Lapsed |