Patent US4570477A successfully refreshed from Google Patents.
US4570477A
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Leak detecting cable
Assignee: Junkosha Co Ltd
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Filing: 1984-01-27
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Granted: 1986-02-18
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Expires: 2004-01-27
Abstract
Abstract A liquid leak detecting sensor in cable form is provided wherein an element of the cable is a material which is easily deformable and which, on deformation, maintains the cable in the deformed configuration.
Inventors
- 👤 Hiroyuki Sugibuchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:51
CPC Classifications
G; G01; G01M; G01M3/00; G01M3/02; G01M3/04; G01M3/042; G01M3/045; G01M3/16; G01M3/165
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
149 words
A liquid detection sensor having an elongated body comprising inner and outer conductors arranged so as to be in a substantially coaxial and parallel relationship, said inner conductor being a linear solid body and said outer conductor being a cylindrical reticulate body, and having an insulating layer of a fluororesin provided between said inner and outer conductors, the outer circumferential surface of said outer conductor being covered with an outer protective covering layer of a porous material, the outer protective covering layer comprising a first sub-layer covering the outer circumferential surface of said outer conductor and a second sub-layer covering the outer circumferential surface of said first sub-layer, and having at least one linear metallic plastically and permanently deformable member of metallic lead or an alloy thereof embedded in said sensor between said first and said second sub-layers, extending along at least a portion of said body's longitudinal direction.
Claim 2
Dependent Claim
149 words
A liquid detection sensor having an elongated body comprising inner and outer conductors arranged so as to be in a substantially coaxial and parallel relationship, said inner conductor being a linear solid body and said outer conductor being a cylindrical reticulate body, and having an insulating layer of a fluororesin provided between said inner and outer conductors, the outer circumferential surface of said outer conductor being covered with an outer protective covering layer of a porous material, the outer protective covering layer comprising a first sub-layer covering the outer circumferential surface of said outer conductor and a second sub-layer covering the outer circumferential surface of said first sub-layer, and having at least one linear metallic plastically and permanently deformable member of metallic lead or an alloy thereof embedded in said sensor between said first and said second sub-layers, extending along at least a portion of said body's longitudinal direction.
Claim 3
Dependent Claim
12 words
The sensor of claim 1 having a plurality of said deformable members.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-02-17 | 1989-08-19 | 1990-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-02-17 | 1993-08-19 | 1994-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-02-17 | 1997-08-19 | 1998-02-18 | $7700.00 | Window Closed / Lapsed |