Patent US4399702A successfully refreshed from Google Patents.
US4399702A
Expired / Lapsed
US
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Method of measuring stress distribution in a solid body
Assignee: Hitachi Ltd
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Filing: 1981-11-24
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Granted: 1983-08-23
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Expires: 2001-11-24
Abstract
Abstract Two ultrasonic wave beams of different frequencies are emitted into a body under consideration from different locations on a surface of the body and a scattered wave beam created at a scattering point in the body by the interaction between the two ultrasonic wave beams is received. The emitting locations of the ultrasonic wave beams and the receiving location of the scattered wave beam are caused to scan. Thus, the stress distribution in the body is measured on the basis of the received outputs resulting from the scanning.
Inventors
- 👤 Katsumichi Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:11
CPC Classifications
G; G01; G01N; G01N29/00; G01N29/04; G01N29/07; G01L; G01L1/00; G01L1/25; G01L1/255; G01N29/11; G01N29/34; G01N29/348; G01S; G01S15/00; G01S15/88; G01S15/89; G01S15/8906; G01S15/895; G01S15/8952; G01N2291/00; G01N2291/02; G01N2291/028; G01N2291/02827
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
A method of measuring stress distribution comprising the steps of: emitting two ultrasonic waves of different frequencies into a body under consideration from different locations on a surface of the body; receiving a scattered wave created at a scattering point in the body by the interaction between the two ultrasonic waves; causing the emitting locations of the ultrasonic waves and the receiving location of the scattered wave to scan; and measuring the stress distribution in the body on the basis of the received outputs resulting from the scanning.
Claim 2
Independent Claim
88 words
A method of measuring stress distribution comprising the steps of: emitting two ultrasonic waves of different frequencies into a body under consideration from different locations on a surface of the body; receiving a scattered wave created at a scattering point in the body by the interaction between the two ultrasonic waves; causing the emitting locations of the ultrasonic waves and the receiving location of the scattered wave to scan; and measuring the stress distribution in the body on the basis of the received outputs resulting from the scanning.
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) | 1986-08-22 | 1987-02-21 | 1987-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-22 | 1991-02-21 | 1991-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-22 | 1995-02-21 | 1995-08-23 | $7700.00 | Window Closed / Lapsed |