US4518101A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metering system for corrosive liquids and method therefor
Assignee: Allegheny Ludlum Corp
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Filing: 1983-03-24
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Granted: 1985-05-21
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Expires: 2003-03-24
Abstract
Abstract A metering system is provided for automatically controlling and monitoring corrosive liquids. The system includes a pneumatically or electrically actuated valve and a meter upstream of the valve. The meter includes a device for transmitting an electrical signal proportional to the flow through the meter to a controller means which receives the signal and counts the volume units of flow. The controller also includes a device to transmit an electrical signal to stop the flow of corrosive liquids at a predetermined volume level. The system includes a timer for activating the system at a preset time and a valve actuator means. A method for automatically controlling and monitoring the flow of corrosive liquids is also provided.
Inventors
- 👤 Philip R. Robinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 06:47
CPC Classifications
G; G01; G01F; G01F13/00; G01F13/006
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
200 words
A metering system for automatically controlling and monitoring corrosive liquids, the system comprising: conduit means through which the corrosive liquid flows from a reservoir to a discharge location; valve means in said conduit means for commencing and stopping the flow of corrosive liquids through the conduit means, said valve means being corrosion resistant and having an actuator for opening and closing the valve; means for metering the flow of corrosive liquids upstream of the valve means, said metering means being corrosion resistant, being maintained full of the corrosive liquid and having a transmitting device for transmitting an electrical signal proportional to the flow; means for controlling the flow of corrosive liquids, said means electrically connected to said metering means and having a receiving device for receiving the electrical signal of said metering means and counting volume units of flow through the metering means, and said means capable of transmitting an electrical signal to stop flow through the valve at a predetermined volume; means for activating the system at a preset time, said means electrically connected from a power supply to the controlling means; and means for actuating the valve means, said actuating means being electrically connected to the timing means.
Claim 2
Dependent Claim
200 words
A metering system for automatically controlling and monitoring corrosive liquids, the system comprising: conduit means through which the corrosive liquid flows from a reservoir to a discharge location; valve means in said conduit means for commencing and stopping the flow of corrosive liquids through the conduit means, said valve means being corrosion resistant and having an actuator for opening and closing the valve; means for metering the flow of corrosive liquids upstream of the valve means, said metering means being corrosion resistant, being maintained full of the corrosive liquid and having a transmitting device for transmitting an electrical signal proportional to the flow; means for controlling the flow of corrosive liquids, said means electrically connected to said metering means and having a receiving device for receiving the electrical signal of said metering means and counting volume units of flow through the metering means, and said means capable of transmitting an electrical signal to stop flow through the valve at a predetermined volume; means for activating the system at a preset time, said means electrically connected from a power supply to the controlling means; and means for actuating the valve means, said actuating means being electrically connected to the timing means.
Claim 3
Dependent Claim
14 words
The system as set forth in claim 1 wherein the actuating means is electrical.
Claim 4
Dependent Claim
14 words
The system as set forth in claim 1 wherein the actuating means is pneumatic.
Claim 5
Dependent Claim
17 words
The system as set forth in claim 1 wherein the controlling means is electrically recycled for counting.
Claim 6
Dependent Claim
23 words
The system as set forth in claim 1 wherein an electrical switch means is provided between the timing means and the valve means.
Claim 7
Independent Claim
111 words
A method for automatically controlling and monitoring corrosive liquids, the method comprising: actuating a valve means for commencing flow through a conduit means at a preset time; flowing corrosive liquids through the conduit means from a reservoir through the valve means to a discharge location; monitoring the volume units of flow at a metering means which is maintained full of the corrosive liquid at a location upstream of the valve means; transmitting an electrical signal from the metering means proportional to the metered flow; receiving at a controlling means an electrical signal and counting the volume units of metered flow; and stopping flow of the corrosive liquids at a predetermined volume.
Claim 8
Independent Claim
111 words
A method for automatically controlling and monitoring corrosive liquids, the method comprising: actuating a valve means for commencing flow through a conduit means at a preset time; flowing corrosive liquids through the conduit means from a reservoir through the valve means to a discharge location; monitoring the volume units of flow at a metering means which is maintained full of the corrosive liquid at a location upstream of the valve means; transmitting an electrical signal from the metering means proportional to the metered flow; receiving at a controlling means an electrical signal and counting the volume units of metered flow; and stopping flow of the corrosive liquids at a predetermined volume.
Claim 9
Dependent Claim
15 words
The method as set forth in claim 6 wherein the valve means is electrically actuated.
Claim 10
Dependent Claim
15 words
The method as set forth in claim 6 wherein the valve means is pneumatically actuated.
Claim 11
Dependent Claim
17 words
The method as set forth in claim 6 including the step of electrically recycling the controller means.
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) | 1988-05-20 | 1988-11-19 | 1989-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-20 | 1992-11-19 | 1993-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-20 | 1996-11-19 | 1997-05-21 | $7700.00 | Window Closed / Lapsed |