US3882382A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Insulated conduit cover and leak detector
Assignee: Transco Inc
•
Filing: 1972-09-07
•
Granted: 1975-05-06
•
Expires: 1992-09-07
Abstract
Abstract A conduit cover prefabricated into complementary insulated ring sections each including an outer metallic cover plate and an electrically conductive metal mesh and an encapsulated insulating mat, with the electrically conductive metal mesh electrically energized and responsive to penetrating moisture from the conduit for completing an electric circuit between the outer metallic cover plate and the metal mesh so as to detect a leak in the conduit.
Inventors
- 👤 Lowell Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:56
CPC Classifications
G; G01; G01M; G01M3/00; G01M3/02; G01M3/04; G01M3/16; G01M3/18; G01N; G01N27/00; G01N27/02; G01N27/04; G01N27/048
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
121 words
An insulated conduit cover and leak detector comprising prefabricated complementary ringlike sections with each ringlike section including a. an outer metallic cover plate, b. an encapsulated mat of insulating material within said cover plate, c. a current conductive member between said cover plate and said conduit to be covered thereby, d. spacer means connected between said current conductive member and said cover plate and in contact with the conduit for separating and electrically insulating said current conductive member from said cover plate and from the conduit covered thereby, and e. electrical means connecting in open circuit said current conductive member, said cover plate, and said conduit and responsive to the escape of moisture through said conduit to close the circuit therebetween.
Claim 2
Dependent Claim
121 words
An insulated conduit cover and leak detector comprising prefabricated complementary ringlike sections with each ringlike section including a. an outer metallic cover plate, b. an encapsulated mat of insulating material within said cover plate, c. a current conductive member between said cover plate and said conduit to be covered thereby, d. spacer means connected between said current conductive member and said cover plate and in contact with the conduit for separating and electrically insulating said current conductive member from said cover plate and from the conduit covered thereby, and e. electrical means connecting in open circuit said current conductive member, said cover plate, and said conduit and responsive to the escape of moisture through said conduit to close the circuit therebetween.
Claim 3
Dependent Claim
21 words
An insulated conduit cover and leak detector as defined by claim 1, wherein said current conductive member comprises a metallic mesh.
Claim 4
Dependent Claim
72 words
An insulated conduit cover and leak detector as defined by claim 1 wherein said means for electrically insulating said current conductive member and said cover plate from said conduit comprises insulating supports connected to and positioning said current conductive member in spaced relation to said metallic cover plate and said conduit, with said insulating support adjustable so as to vary the open circuit gap between said current conductive member and said conduit.
Claim 5
Dependent Claim
65 words
An insulated conduit cover and leak detector as defined by claim 2 wherein said means for electrically insulating said current conductive member from said cover plate comprises insulating supports carried by said metallic mesh in spaced relation to said cover plate and said conduit with said insulating supports being adjustable so as to vary the open circuit gap between said metallic mesh and said conduit.
References Cited (Backward Citations)
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Cited
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US3382493A
Cited
US3383863A
Cited
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-05 | 1978-11-04 | 1979-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-05 | 1982-11-04 | 1983-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-05 | 1986-11-04 | 1987-05-06 | $7700.00 | Window Closed / Lapsed |