US4112773A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultrasonic particulate sensing
Assignee: MONITEK TECHNOLOGIES Inc
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Filing: 1977-05-02
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Granted: 1978-09-12
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Expires: 1997-05-02
Abstract
Abstract A pulse echo device with a concave transmitter-receiver surface located to direct ultrasonic energy to a focal point spaced therefrom transversely of a conduit, the focal point being a distance transversely of the conduit less than twice the thickness of the conduit.
Inventors
- 👤 Leigh Roy Abts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:09
CPC Classifications
G; G10; G10K; G10K11/00; G10K11/18; G10K11/26; G10K11/32; G01; G01N; G01N29/00; G01N29/02; G01N29/032; A; A61; A61M; A61M1/00; A61M1/36; A61M1/3621; A61M1/3626
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
89 words
A pulse echo device comprising a conduit, said conduit including a blind hole and an inwardly concave transmitter-receiver surface, and an acoustical transducer mounted in said blind hole for delivering ultrasonic energy through said transmitter-receiver surface, said transmitter-receiver surface being located to serve as a lens for and to thereby focus said ultrasonic energy to a focal point at a distance transversely of said conduit, in a direction from said transmitter-receiver surface toward said focal point, of not more than twice the distance in said direction across said conduit.
Claim 2
Dependent Claim
89 words
A pulse echo device comprising a conduit, said conduit including a blind hole and an inwardly concave transmitter-receiver surface, and an acoustical transducer mounted in said blind hole for delivering ultrasonic energy through said transmitter-receiver surface, said transmitter-receiver surface being located to serve as a lens for and to thereby focus said ultrasonic energy to a focal point at a distance transversely of said conduit, in a direction from said transmitter-receiver surface toward said focal point, of not more than twice the distance in said direction across said conduit.
Claim 3
Dependent Claim
15 words
The device of claim 1 in which the bottom of said blind hole is flat.
Claim 4
Dependent Claim
11 words
The device of claim 1 in which said conduit is cylindrical.
Claim 5
Dependent Claim
19 words
The device of claim 3 in which said focal length is slightly less than the diameter of said conduit.
Claim 6
Dependent Claim
13 words
The device of claim 2 in which said hole is an elongated groove.
Claim 7
Dependent Claim
13 words
The device of claim 5 in which said wall is of methyl methacrylate.
Claim 8
Dependent Claim
19 words
The device of claim 2 in which said hole is surrounded by a multiplicity of closely-spaced small blind holes.
Claim 9
Dependent Claim
16 words
The device of claim 7 in which said small blind holes define a plurality of rows.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-09-11 | 1982-03-13 | 1982-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-11 | 1986-03-13 | 1986-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-11 | 1990-03-13 | 1990-09-12 | $7700.00 | Window Closed / Lapsed |