US3984877A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flush tank warning system
Assignee: Individual
•
Filing: 1975-10-09
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Granted: 1976-10-12
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Expires: 1995-10-09
Abstract
Abstract A water level monitor and alarm indicates when the drain valve in a toilet flush tank is improperly seated and water is not filling the flush tank as required. The monitor can also be adjusted to indicate when water is overfilling the flush tank. A hollow tube contains a float and fills with water as the tank fills, lifting the float. If water continues filling the tank after a predetermined level is reached, a portion of the float will trip a switch and indicating devices outside the tank will signal the overfill. When the flush tank empties, water is metered from the hollow tube through a variable size opening and gradually lowers the float contained therein, causing the float to descend at a slower rate than the tank water level. If the tank does not begin filling with water at a proper time to intercept the float, the float will continue to descend, and, at a predetermined level, trigger an alarm to signal that the flush tank is not filling.
Inventors
- 👤 James D. Kirby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:58
CPC Classifications
E; E03; E03D; E03D1/00; E03D5/00; E03D5/02; E03D5/026
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
166 words
In a receptacle for storing fluid wherein fluid may be emptied and filled to alternately lower and raise the fluid level in the receptacle, a fluid level monitor comprising: a control tube; said control tube having inlet means to admit fluid to the tube as fluid level in the receptacle rises and having outlet means to drain fluid from the control tube; said outlet means including fluid metering means for lowering a level of fluid within the control tube at a rate slower than the rate of fluid emptying from the receptacle; means for sensing a lowered fluid level in the control tube and including means fixedly mounted with respect to the control tube with means responsive to a lowered fluid level inside the control tube; and, signal means actuated by the means for sensing a lowered fluid level in the control tube to indicate when fluid has metered from the control tube before the control tube is filled with water as the receptacle is filled.
Claim 2
Dependent Claim
166 words
In a receptacle for storing fluid wherein fluid may be emptied and filled to alternately lower and raise the fluid level in the receptacle, a fluid level monitor comprising: a control tube; said control tube having inlet means to admit fluid to the tube as fluid level in the receptacle rises and having outlet means to drain fluid from the control tube; said outlet means including fluid metering means for lowering a level of fluid within the control tube at a rate slower than the rate of fluid emptying from the receptacle; means for sensing a lowered fluid level in the control tube and including means fixedly mounted with respect to the control tube with means responsive to a lowered fluid level inside the control tube; and, signal means actuated by the means for sensing a lowered fluid level in the control tube to indicate when fluid has metered from the control tube before the control tube is filled with water as the receptacle is filled.
Claim 3
Dependent Claim
36 words
The fluid level monitor of claim 1, wherein said fluid metering means includes: an outlet opening in said control tube; and, flow regulating means, including adjusting means, movable to vary the size of said outlet opening.
Claim 4
Dependent Claim
50 words
The fluid level monitor of claim 1, wherein said means for sensing a lowered fluid level within the control tube includes: a float; indicator means movable with said float and having actuating means; and, switch means in alignment with the actuating means of said float for operating the signal means.
Claim 5
Dependent Claim
51 words
The fluid level monitor of claim 1, and: means for sensing a raised fluid level in the control tube and including switch means fixed with respect to the control tube and having circuit element means operable by the raised level of fluid in the control tube to operate the signal means.
Claim 6
Dependent Claim
30 words
The fluid level monitor of claim 4, and: mounting means for attachment of the switch means and including means for adjustably positioning the switch means relative to the control tube.
Claim 7
Dependent Claim
20 words
The fluid level monitor of claim 1, and: means adjustably mounting said control tube for vertical positioning in the receptacle.
Claim 8
Dependent Claim
43 words
The fluid level monitor of claim 1, and: a mounting bracket having means for removably attaching said monitor to the fluid receptacle; and, positioning means on said mounting bracket and having guide surfaces cooperative with the control tube during vertical movement of same.
Claim 9
Dependent Claim
59 words
The fluid monitor of claim 7, wherein the mounting bracket includes: first and second spaced and generally parallel walls depending from a common part, said first wall being associated with the control tube and said second wall being associated with said signal means; and, said positioning means including a pair of spaced, elongated guide protrusions adjacent said control tube.
References Cited (Backward Citations)
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US2361677A
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US3759286A
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US3848627A
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US3715549A
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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) | 1979-10-12 | 1980-04-12 | 1980-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-12 | 1984-04-12 | 1984-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-12 | 1988-04-12 | 1988-10-12 | $7700.00 | Window Closed / Lapsed |