US4576037A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Leak detectors
Assignee: Dunlop Oil and Marine Ltd
•
Filing: 1984-04-19
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Granted: 1986-03-18
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Expires: 2004-04-19
Abstract
Abstract In a leak detector of a kind suitable for mounting externally of a flexible hose to detect leakage of fluid through at least a part of the hose and generate a warning signal in response thereto, test means is provided for checking the operating capability of the detector. The test means is of a kind operable from outside of the detector, for example by means of a magnet or an ultrasonic signal. Accordingly particularly when the leak detector is used in underwater situations the operating capability of the detector may readily be checked in situ.
Inventors
- 👤 Andrew P. D. Cox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:48
CPC Classifications
G; G01; G01M; G01M3/00; G01M3/02; G01M3/26; G01M3/28; G01M3/2807; G01M3/283
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
59 words
A leak detector for mounting externally of a flexible hose and operable in response to the pressure of fluid leaking through at least a part of the flexible hose to generate warning signal, said leak detector comprising test means for checking the operating capability of the detector, and means for operating said test means from outside of the detector.
Claim 2
Dependent Claim
59 words
A leak detector for mounting externally of a flexible hose and operable in response to the pressure of fluid leaking through at least a part of the flexible hose to generate warning signal, said leak detector comprising test means for checking the operating capability of the detector, and means for operating said test means from outside of the detector.
Claim 3
Dependent Claim
27 words
A leak detector according to claim 1 wherein said test means comprises a switch housed within the detector and actuable from outside the detector by a magnet.
Claim 4
Dependent Claim
28 words
A leak detector according to claim 1 wherein said test means comprises a switch housed within the detector and actuable from outside the detector by an ultrasonic signal.
Claim 5
Dependent Claim
20 words
A leak detector according to claim 1 and comprising visual indication means to indicate the operating capability of the detector.
Claim 6
Dependent Claim
24 words
A leak detector according to claim 4 wherein said visual indication means comprises a light source powered by a power source within the detector.
Claim 7
Dependent Claim
24 words
A leak detector according to claim 1 wherein the detector comprises a rigid pressure resistant water-tight casing in which the test means is located.
Claim 8
Dependent Claim
28 words
A leak detector according to claim 1 wherein the test means is operable to provide an indication of the state of a power source within the leak detector.
Claim 9
Dependent Claim
41 words
A leak detector according to claim 1 wherein the test means includes means to provide an indication of the capability of the detector to generate a warning signal in response to a change of fluid pressure applied to the leak detector.
Claim 10
Dependent Claim
14 words
A leak detector according to claim 1 operable to activate a remote warning device.
Claim 11
Dependent Claim
115 words
A leak detector for mounting externally of a flexible hose and operable in response to the pressure of fluid leaking through at least a part of the flexible hose to generate a warning signal, said leak detector comprising a rigid pressure-resistant water-tight casing wherein is located a power source, a pressure sensitive switch in communication with a passage which extends through the casing, a light, an acoustic transducer, a pressure sensitive switch which is connected to activate the light and acoustic transducer when the pressure sensed by the pressure sensitive switch reaches a predetermined level, and means to operate said test means from outside the casing to cause actuation of the light and acoustic transducer.
Claim 12
Dependent Claim
115 words
A leak detector for mounting externally of a flexible hose and operable in response to the pressure of fluid leaking through at least a part of the flexible hose to generate a warning signal, said leak detector comprising a rigid pressure-resistant water-tight casing wherein is located a power source, a pressure sensitive switch in communication with a passage which extends through the casing, a light, an acoustic transducer, a pressure sensitive switch which is connected to activate the light and acoustic transducer when the pressure sensed by the pressure sensitive switch reaches a predetermined level, and means to operate said test means from outside the casing to cause actuation of the light and acoustic transducer.
Claim 13
Dependent Claim
82 words
A flexible hose assembly comprising a flexible hose having main fluid retaining carcass and a secondary fluid retaining carcass secured to a rigid end fitting, and mounted externally of the hose a leak detector operable in response to the pressure of fluid leaking through at least a part of the flexible hose to generate warning signal, said leak detector comprising test means for checking the operating capability of the detector, and means to operate said test means from outside of the detector.
Claim 14
Dependent Claim
82 words
A flexible hose assembly comprising a flexible hose having main fluid retaining carcass and a secondary fluid retaining carcass secured to a rigid end fitting, and mounted externally of the hose a leak detector operable in response to the pressure of fluid leaking through at least a part of the flexible hose to generate warning signal, said leak detector comprising test means for checking the operating capability of the detector, and means to operate said test means from outside of the detector.
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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) | 1989-03-17 | 1989-09-16 | 1990-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-17 | 1993-09-16 | 1994-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-17 | 1997-09-16 | 1998-03-18 | $7700.00 | Window Closed / Lapsed |