US3787650A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water detection device for fuel line
Assignee: Individual
•
Filing: 1972-09-21
•
Granted: 1974-01-22
•
Expires: 1992-09-21
Abstract
Abstract A warning mechanism is used to indicate the presence of an impurity in a tube carrying a fluid, for example, to warn of water in a hydrocarbon fuel line. The mechanism includes a thin plastic disk which is insoluble in the fluid but soluble in the impurity, a chamber filled by the mixture after partial dissolving of the disk, and a pressure responsive transducer.
Inventors
- 👤 W Lewis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:30
CPC Classifications
H; H01; H01H; H01H35/00; H01H35/24; H01H35/38; Y; Y10; Y10T; Y10T137/00; Y10T137/1624
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
149 words
A warning device to detect the presence of an impurity in a liquid, comprising a body member adapted to be mounted on a container or line for the fluid, said body member having an internal chamber, said body member having an orifice into said chamber, a film sealing said orifice, said film being insoluble in said fluid and soluble by said impurity, said film sealing said fluid from said chamber after mounting of said body member, and a pressue actuated electrical switch attached to said body member and positioned so that flow of fluid through said orifice will actuate said switch and wherein said body portion is cylindrical and has a bottom internal flange forming a lip, a first washer mounted on said flange within said chamber, said film being positioned on said washer, a second washer positioned on said film, and a spring compressed against said second washer.
Claim 2
Dependent Claim
149 words
A warning device to detect the presence of an impurity in a liquid, comprising a body member adapted to be mounted on a container or line for the fluid, said body member having an internal chamber, said body member having an orifice into said chamber, a film sealing said orifice, said film being insoluble in said fluid and soluble by said impurity, said film sealing said fluid from said chamber after mounting of said body member, and a pressue actuated electrical switch attached to said body member and positioned so that flow of fluid through said orifice will actuate said switch and wherein said body portion is cylindrical and has a bottom internal flange forming a lip, a first washer mounted on said flange within said chamber, said film being positioned on said washer, a second washer positioned on said film, and a spring compressed against said second washer.
Claim 3
Dependent Claim
40 words
A warning device as in claim 1 wherein the holes of the washers are aligned with the hole formed by said flange, and the hole of said first washer is larger in diameter than the hole of said second washer.
Claim 4
Dependent Claim
22 words
A warning device as in claim 1 wherein said washers are flexible and resilient and insoluble in said liquid or said impurity.
References Cited (Backward Citations)
US2263840A
Cited
US2781769A
Cited
US2944125A
Cited
US3046369A
Cited
US3014206A
Cited
US3209732A
Cited
US3472253A
Cited
US3531604A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |