US4760740A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum coupled transducer
Assignee: Raymond Engineering Inc
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Filing: 1987-07-22
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Granted: 1988-08-02
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Expires: 2007-07-22
Abstract
Abstract A vacuum coupled ultrasonic transducer is presented for coupling a transducer to a bolt for ultrasonic measurement of bolt elongation. A central passageway extends through the transducer body, the piezoelectric crystal and a seal element. A vacuum line extends through the central passageway.
Inventors
- 👤 Jesse R. Meisterling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:45
CPC Classifications
G; G10; G10K; G10K11/00; G10K11/004; G01; G01N; G01N29/00; G01N29/22; G01N29/28; G01N2291/00; G01N2291/02; G01N2291/028; G01N2291/02854; G01N2291/26; G01N2291/269; G01N2291/2691
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
81 words
Apparatus for attaching a transducer to a fastener element, the apparatus including: housing means for containing a transducer; transducer means within said housing means; seal means at an end of said housing means intended to be mounted on a fastener element; passage means through said housing means, said transducer means and said seal means; and vacuum means connected to said passage means to pull a vacuum to bring the transducer into firm engagement with a fastener when mounted on the fastener.
Claim 2
Dependent Claim
81 words
Apparatus for attaching a transducer to a fastener element, the apparatus including: housing means for containing a transducer; transducer means within said housing means; seal means at an end of said housing means intended to be mounted on a fastener element; passage means through said housing means, said transducer means and said seal means; and vacuum means connected to said passage means to pull a vacuum to bring the transducer into firm engagement with a fastener when mounted on the fastener.
Claim 3
Dependent Claim
23 words
The apparatus of claim 1 wherein: said transducer means includes piezoelectric crystal means; and said passage means extending through said piezoelectric crystal means.
Claim 4
Dependent Claim
29 words
The apparatus of claim 1 wherein: said seal means includes elastomeric means mounted on one end of said housing means; and said passage means extending through said elastomeric means.
Claim 5
Dependent Claim
26 words
The apparatus of claim 3 wherein: said elastomeric means is sized or contoured to be compatible with a fastener on which it is to be mounted.
Claim 6
Dependent Claim
15 words
The apparatus of claim 3 including: a contoured radiused external surface on said seal means.
References Cited (Backward Citations)
US3810385A
Cited
US4217849A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-08-02 | 1992-02-01 | 1992-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-02 | 1996-02-01 | 1996-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-02 | 2000-02-01 | 2000-08-02 | $7700.00 | Window Closed / Lapsed |