Patent US4563674A successfully refreshed from Google Patents.
US4563674A
Expired / Lapsed
US
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Oil leak detector
Assignee: Junkosha Co Ltd
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Filing: 1983-09-13
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Granted: 1986-01-07
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Expires: 2003-09-13
Abstract
Abstract An improved floating sensor for the detection of oil leaks at a water surface is provided wherein a cloth layer is affixed to the outside of a leak detector which, by capillary action, results in a threshold level of oil film thickness below which no alarm sounds and above which an alarm will sound. The invention provides means for the pre-selection of the thickness of oil film which will be detected and eliminates the detection of very thin, inconsequential oil leaks.
Inventors
- 👤 Satoru Kobayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:45
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/18; G01N33/1826; G01N33/1833; B; B01; B01D; B01D17/00; B01D17/02; B01D17/0208; B01D17/0214; G01N27/00; G01N27/02; G01N27/04; G01N27/041; Y; Y10; Y10S; Y10S210/00; Y10S210/918; Y10S210/922; Y10S210/924
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
98 words
Apparatus for detecting oil floating on the surface of water, the apparatus comprising: a detecting device floating on the surface of said water and capable of absorbing oil floating on the surface of said water, the detecting device having warning means which is operated according to a change in the electrical conductivity of the detecting device that is caused by absorption of oil, and a layer of cloth affixed outside said detecting device such that it forms a boundary of water at a height above the general surface of the water adjacent the outer periphery of said apparatus.
Claim 2
Dependent Claim
98 words
Apparatus for detecting oil floating on the surface of water, the apparatus comprising: a detecting device floating on the surface of said water and capable of absorbing oil floating on the surface of said water, the detecting device having warning means which is operated according to a change in the electrical conductivity of the detecting device that is caused by absorption of oil, and a layer of cloth affixed outside said detecting device such that it forms a boundary of water at a height above the general surface of the water adjacent the outer periphery of said apparatus.
Claim 3
Dependent Claim
31 words
Apparatus for detecting oil floating on the surface of water as set forth in claim 1, wherein the layer of cloth is disposed on the outer periphery of said detecting device.
Claim 4
Dependent Claim
34 words
Apparatus for detecting oil floating on the surface of water as set forth in claim 1, wherein the layer of cloth is disposed on the outer periphery of a housing containing said detecting device.
Claim 5
Dependent Claim
50 words
Apparatus for detecting oil floating on the surface of water as set forth in any of claims 1-3, wherein said detecting device has a layer of an oil absorbing material on the outer periphery thereof and said cloth layer is disposed on the outer periphery of said oil absorbing material.
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) | 1989-01-06 | 1989-07-08 | 1990-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-06 | 1993-07-08 | 1994-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-06 | 1997-07-08 | 1998-01-07 | $7700.00 | Window Closed / Lapsed |