US3822933A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Level control
Assignee: LIQUID LEVEL LECTRONICS Inc
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Filing: 1972-10-10
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Granted: 1974-07-09
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Expires: 1992-10-10
Abstract
Abstract A liquid-level control, utilizing a magnet-containing float lever arm to control the fluid input to or output from a vessel.
Inventors
- 👤 J Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:54
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/02; F16K31/06; F16K31/08; F16K31/086; F16K31/088; F16K31/12; F16K31/18; F16K31/20
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
234 words
In a liquid level control having a motor device for providing said liquid to a vessel and a source of pressurized fluid for controlling operations of said motor, the improvement comprising: a housing; a float mounted on a first lever, said first lever being pivotally mounted on said housing, said float extending at least partially within said vessel; a single arm of said first lever, extending opposite from said float, including first magnet means; and magnetically controlled means for regulating the supply of said fluid supplied said motor, said regulating means including: a further lever, positioned within a first cavity in said housing, isolated from said first lever, also pivotally mounted on said housing, one arm of said further lever including magnetically attracted means, said further lever being so positioned as to be oscillatable as a function of the proximity of said magnetically attractable means to said first magnet means; bifurcated passageway means linking both said source with said motor and said source with said first cavity; throttling means for regulatably blocking passage of fluid through said passageway linking said source and said first cavity, said throttling means being positioned on another arm of said further lever opposite from said magnetically attracted means, whereby the quantity of said fluid entering said first cavity is incrementally increased or decreased as a function of the proximity of said first magnet means to said magnetically attracted means.
Claim 2
Dependent Claim
234 words
In a liquid level control having a motor device for providing said liquid to a vessel and a source of pressurized fluid for controlling operations of said motor, the improvement comprising: a housing; a float mounted on a first lever, said first lever being pivotally mounted on said housing, said float extending at least partially within said vessel; a single arm of said first lever, extending opposite from said float, including first magnet means; and magnetically controlled means for regulating the supply of said fluid supplied said motor, said regulating means including: a further lever, positioned within a first cavity in said housing, isolated from said first lever, also pivotally mounted on said housing, one arm of said further lever including magnetically attracted means, said further lever being so positioned as to be oscillatable as a function of the proximity of said magnetically attractable means to said first magnet means; bifurcated passageway means linking both said source with said motor and said source with said first cavity; throttling means for regulatably blocking passage of fluid through said passageway linking said source and said first cavity, said throttling means being positioned on another arm of said further lever opposite from said magnetically attracted means, whereby the quantity of said fluid entering said first cavity is incrementally increased or decreased as a function of the proximity of said first magnet means to said magnetically attracted means.
Claim 3
Dependent Claim
21 words
The control of claim 1 wherein said throttleing means includes a gasket member provided said another arm of said further lever.
Claim 4
Dependent Claim
16 words
The control of claim 1 wherein said bifurcated passageway means are positioned within a pilot portion.
Claim 5
Dependent Claim
14 words
The control of claim 1 wherein said magnetically attracted means is a further magnet.
Claim 6
Dependent Claim
23 words
The control of claim 1 wherein said one arm of said first lever is oscillatably positioned within a further cavity provided said housing.
Claim 7
Dependent Claim
13 words
The control of claim 1 wherein said first cavity includes an exhaust port.
Claim 8
Dependent Claim
33 words
The control of claim 9 and including means for causing the quantity of said liquid provided said vessel to be inversely proportional to the quantity of said fluid passing through said exhaust port.
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) | 1977-07-08 | 1978-01-07 | 1978-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-08 | 1982-01-07 | 1982-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-08 | 1986-01-07 | 1986-07-09 | $7700.00 | Window Closed / Lapsed |