US3970504A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultrasonic coupling method
Assignee: Combustion Engineering Inc
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Filing: 1974-10-25
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Granted: 1976-07-20
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Expires: 1994-10-25
Abstract
Abstract An ultrasonic transducer is adhered to and electrically and ultrasonically coupled with a surface by means of a room temperature vulcanizing material which is stable when subjected to high temperature and radiation levels. The RTV material is formed from either a vinylmethyl or polyphenyl siloxane matrix containing an iron oxide filler-binder, a cross-linking agent and a finely divided, uniformly dispersed conductive powder. The conductive powder for use in radiation environments is either palladium or graphite and it is homogeneously dispersed by using a temporary dispersing agent.
Inventors
- 👤 David Nelson Palmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:42
CPC Classifications
C; C09; C09J; C09J183/00; C09J183/04; C08; C08K; C08K3/00; C08K3/02; C08K3/04; C08K3/08; C08K3/18; C08K3/20; C08K5/00; C08K5/0008; C08K5/0025; C08K5/04; C08K5/09; C08L; C08L2666/00; C08L2666/54
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
118 words
A method of adhering and ultrasonicly and electrically coupling an ultrasonic transducer to a surface wherein said coupling will be subject to high temperature and radiation comprising the steps of applying a layer of electrically conductive room temperature vulcanizing material between said transducer and said surface and curing said room temperature vulcanizing material to cause said transducer to be adhered and coupled to said surface, said room temperature vulcanizing material comprising: a. a matrix selected from the group consisting of vinylmethyl siloxane and polyphenyl siloxane; b. an iron oxide binder-filler; c. a catalyst capable of causing cross-linking of said matrix; and d. a finely divided homogenously dispersed conductive material selected from the group consisting of palladium and graphite.
Claim 2
Independent Claim
118 words
A method of adhering and ultrasonicly and electrically coupling an ultrasonic transducer to a surface wherein said coupling will be subject to high temperature and radiation comprising the steps of applying a layer of electrically conductive room temperature vulcanizing material between said transducer and said surface and curing said room temperature vulcanizing material to cause said transducer to be adhered and coupled to said surface, said room temperature vulcanizing material comprising: a. a matrix selected from the group consisting of vinylmethyl siloxane and polyphenyl siloxane; b. an iron oxide binder-filler; c. a catalyst capable of causing cross-linking of said matrix; and d. a finely divided homogenously dispersed conductive material selected from the group consisting of palladium and graphite.
Claim 3
Dependent Claim
13 words
A method as recited in claim 1 wherein said catalyst comprises acetic anhydride.
Claim 4
Dependent Claim
43 words
A method as recited in claim 2 wherein the ratios of matrix, iron oxide, catalyst and conductive material are as follows: COMPONENT PARTS BY WEIGHT
______________________________________
Matrix 100
Iron Oxide 10 to 25
Catalyst 0.1 to 5.0
Conductive Material
50 to 100.
______________________________________
Claim 5
Dependent Claim
25 words
A method as recited in claim 1 wherein said catalyst is selected from the group consisting of acetic anhydride, dibutyl tin dilaurate and tin octoate.
Claim 6
Dependent Claim
19 words
A method as recited in claim 1 wherein said conductive material has a particle size of about 325 mesh.
References Cited (Backward Citations)
US3296195A
Cited
US3723481A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-07-20 | 1980-01-19 | 1980-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-20 | 1984-01-19 | 1984-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-20 | 1988-01-19 | 1988-07-20 | $7700.00 | Window Closed / Lapsed |