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US3822933A Expired / Lapsed US ⏱️ 0.0 years remaining

Level control

Assignee: LIQUID LEVEL LECTRONICS Inc
•
Filing: 1972-10-10
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Granted: 1974-07-09
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Expires: 1992-10-10
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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)

US1894367A Cited
US2626594A Cited
US2842150A Cited
US3090849A Cited

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

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