US3207365A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chemical apparatus and method
Assignee: Pennwalt Corp
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Filing: 1964-06-11
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Granted: 1965-09-21
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Expires: 1984-06-11
Abstract
No abstract record available.
Inventors
- 👤 Robert M Burford
- 👤 William V Bault
- 👤 O'neill Phillip
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:41
CPC Classifications
B; B01; B01F; B01F33/00; B01F33/80; G; G05; G05D; G05D21/00; G05D21/02; B01F21/00; B01F21/20; B01F25/00; B01F25/10; B01F25/20; B01F25/27; B01F25/30; B01F25/31; B01F25/312; B01F25/3124; B01F25/31243; B01F25/50; B01F25/53; B01F25/70; B01F25/72; B01F25/721; B01F25/80; B01F25/85; B01F35/00; B01F35/20; B01F35/21; B01F35/213; B01F35/2132; B01F35/71; B01F35/712; B01F35/717; B01F35/7173; B01F35/71731; B01F35/71775; B01F35/718; B01F35/80; B01F35/82
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
313 words
APPARATUS FOR MAINTAINING A PRESET RANGE OF CONCENTRATION OF A WATER SOLUBLE MATERIAL WHICH IS HYGROSCOPIC IN DRY POWDERED FORM BY FEEDING SAID MATERIAL TO AN AQUEOUS SOLUTION AT A CONTROLLED RATE IN RESPONSE TO A SIGNAL FROM A CONCENTRATION-MEASURING SENSOR, COMPRISING IN COMBINATION: (A) A SENSOR FOR DETECTING LOW CONCENTRATIONS OF A WATER SOLUBLE INORGANIC HYDROSCOPIC SALT IN AN AQUEOUS WORKING SOLUTION. (B) AN INTERMITTENTLY OPERATED DRY FEEDER FOR POWDERED MATERIALS OPERATING IN RESPONSE TO A SIGNAL FROM SAID SENSOR AND FEEDING DRY MATERIALS AT A PRESET CONSTANT RATE, SAID DRY FEEDER BEING SHUT OFF BY A SIGNAL FROM SAID SENSOR INDICATING A SATISFACTOR HIGH CONCENTRATION IN SAID WORKING SOLUTIONS. (C) A SUBSTANTIALLY CONICAL DISSOLVING CHAMBER LOCATED DIRECTLY BENEATH THE DISCHARGE OF SAID DRY FEEDER, SAID DISSOLVING CHAMBER HAVING WASH DOWN LIQUID CONTINUOUSLY INJECTING A STREAM OF WASH DOWN LIQUID INTO SAID CHAMBER TO WASH SAID HYGROSCOPIC POWDERED MATERIALS DOWNWARD THROUGH THE BOTTOM OUTLET OF SAID DISSOLVING CHAMBER, THE FLOW OF SAID WASH DOWN LIQUID BEING SUFFICIENT TO PREVENT BRIDGING OF THE BOTTOM OUTLET OF SAID CONICAL DISSOLVING CHAMBER AND BEING INSUFFICIENT TO CAUSE OVERFLOWING OF SAID WASH DOWN LIQUID FROM SAID DISSOLVING CHAMBER. (D) A LIQUID OPERATED EJECTOR HAVING AN INLET AND AN OUTLET AND A VACUUM SIDE ARM SUBSTANTIALLY AT RIGHT ANGLES TO THE MAIN PATH BETWEEN SAID INLET AND SAID OUTLET, SAID VACUUM SIDE ARM BEING BELOW AND COMMUNICATING SUBSTANTIALLY DIRECTLY WITH THE BOTTOM DISCHARGE OF SAID CONICAL DISSOLVING CHAMBER. (E) MEANS FOR DELIVERING A STREAM OF SAID WORKING SOLUTION TO THE INLET OF SAID EJECTOR, SAID STREAM PULLING A VACUUM ON SAID SIDE ARM AND PASSING OUT THE OUTLET OF SAID EJECTOR, (F) CONDUIT MEANS FOR CONDUCTING SAID STREAM OF WORKING SOLUTION TOGETHER WITH THE POWDERED MATERIAL FROM SAID CONICAL DISCHARGE CHAMBER FROM THE OUTLET OF SAID EJECTOR BACK TO A POINT OF USE OF SAID WORKING FLUID.
Claim 2
Dependent Claim
313 words
APPARATUS FOR MAINTAINING A PRESET RANGE OF CONCENTRATION OF A WATER SOLUBLE MATERIAL WHICH IS HYGROSCOPIC IN DRY POWDERED FORM BY FEEDING SAID MATERIAL TO AN AQUEOUS SOLUTION AT A CONTROLLED RATE IN RESPONSE TO A SIGNAL FROM A CONCENTRATION-MEASURING SENSOR, COMPRISING IN COMBINATION: (A) A SENSOR FOR DETECTING LOW CONCENTRATIONS OF A WATER SOLUBLE INORGANIC HYDROSCOPIC SALT IN AN AQUEOUS WORKING SOLUTION. (B) AN INTERMITTENTLY OPERATED DRY FEEDER FOR POWDERED MATERIALS OPERATING IN RESPONSE TO A SIGNAL FROM SAID SENSOR AND FEEDING DRY MATERIALS AT A PRESET CONSTANT RATE, SAID DRY FEEDER BEING SHUT OFF BY A SIGNAL FROM SAID SENSOR INDICATING A SATISFACTOR HIGH CONCENTRATION IN SAID WORKING SOLUTIONS. (C) A SUBSTANTIALLY CONICAL DISSOLVING CHAMBER LOCATED DIRECTLY BENEATH THE DISCHARGE OF SAID DRY FEEDER, SAID DISSOLVING CHAMBER HAVING WASH DOWN LIQUID CONTINUOUSLY INJECTING A STREAM OF WASH DOWN LIQUID INTO SAID CHAMBER TO WASH SAID HYGROSCOPIC POWDERED MATERIALS DOWNWARD THROUGH THE BOTTOM OUTLET OF SAID DISSOLVING CHAMBER, THE FLOW OF SAID WASH DOWN LIQUID BEING SUFFICIENT TO PREVENT BRIDGING OF THE BOTTOM OUTLET OF SAID CONICAL DISSOLVING CHAMBER AND BEING INSUFFICIENT TO CAUSE OVERFLOWING OF SAID WASH DOWN LIQUID FROM SAID DISSOLVING CHAMBER. (D) A LIQUID OPERATED EJECTOR HAVING AN INLET AND AN OUTLET AND A VACUUM SIDE ARM SUBSTANTIALLY AT RIGHT ANGLES TO THE MAIN PATH BETWEEN SAID INLET AND SAID OUTLET, SAID VACUUM SIDE ARM BEING BELOW AND COMMUNICATING SUBSTANTIALLY DIRECTLY WITH THE BOTTOM DISCHARGE OF SAID CONICAL DISSOLVING CHAMBER. (E) MEANS FOR DELIVERING A STREAM OF SAID WORKING SOLUTION TO THE INLET OF SAID EJECTOR, SAID STREAM PULLING A VACUUM ON SAID SIDE ARM AND PASSING OUT THE OUTLET OF SAID EJECTOR, (F) CONDUIT MEANS FOR CONDUCTING SAID STREAM OF WORKING SOLUTION TOGETHER WITH THE POWDERED MATERIAL FROM SAID CONICAL DISCHARGE CHAMBER FROM THE OUTLET OF SAID EJECTOR BACK TO A POINT OF USE OF SAID WORKING FLUID.
Claim 3
Dependent Claim
285 words
THE PROCESS OF PREPARING AQUEOUS WORKING SOLUTIONS OF A WATER SOLUBLE MATERIAL WHICH IS HYGROSCOPIC IN DRY POWDERED FORM COMPRISING THE STEPS OF: (A) INTERMITTENTLY DISCHARGING DRY WATER SOLUBLE HYGROSCOPIC MATERIAL INTO A CONICAL DISSOLVING CHAMBER AT A CONSTANT RATE SAID MATERIAL FALLING FROM THE DISCHARGE OF A DRY FEEDER THROUGH AN AIR SPACE INTO SAID DISSOLVING CHAMBER, (B) AT LEAST DURING THE DISCHARGE OF THE DRY HYGROSCOPIC POWDERED MATERIALS, FLUSHING SAID MATERIALS FROM SAID DISSOLVING CHAMBER WITH A STREAM OF WASH DOWN LIQUID INTRODUCED AT THE TOP OF SAID DISSOLVING CHAMBER AND FLOWING DOWN THE SIDES OF SAID DISSOLVING CHAMBER, (C) REMOVING SAID WASH DOWN LIQUID STREAM AND SAID DRY POWDERED MATERIAL THROUGH THE BOTTOM OUTLET OF SAID DISSOLVING CHAMBER UNDER THE VACUUM DRAWN BY A LIQUID OPERATED EJECTOR, THE VACUUM SIDE ARM OF WHICH COMMUNICATES SUBSTANTIALLY DIRECTLY WITH THE BOTTOM DISCHARGE OF SAID DISSOLVING CHAMBER, SAID WASH DOWN LIQUID FLOWING WITH SUFFICIENT VELOCITY AND AT A SUFFICIENT RATE TO PREVENT BRIDGING OF THE BOTTOM OUTLET BY THE DRY POWDERED MATERIAL AND AT INSUFFICIENTLY HIGH RATE TO OVERFLOW FROM SAID DISSOLVING CHAMBER, AND MAINTAINING A PASSAGE FOR AIR TO BE DRAWN FROM THE SPACE BETWEEN THE TOP OF THE DISSOLVING CHAMBER AND THE BOTTOM OF THE DRY FEEDER DISCHARGE DOWNWARD INTO THE THROAT OF THE EJECTOR, (D) PASSING A STREAM OF WORKING SOLUTION DRAWN FROM WORK TANKS INTO THE INLET OF SAID EJECTOR AT SUFFICIENT PRESSURE TO MAINTAIN A VACUUM ON THE SIDEARM OF THE EJECTOR, (E) CONDUCTING THE STREAM OF WORKING SOLUTION TOGETHER WITH THE DRY POWDERED MATERIAL AND AIR DRAWN INTO THE THROAT OF THE EJECTOR AWAY FROM THE OUTLET OF THE EJECTOR TO A POINT OF USE OF SAID WORKING SOLUTION.
Claim 4
Dependent Claim
285 words
THE PROCESS OF PREPARING AQUEOUS WORKING SOLUTIONS OF A WATER SOLUBLE MATERIAL WHICH IS HYGROSCOPIC IN DRY POWDERED FORM COMPRISING THE STEPS OF: (A) INTERMITTENTLY DISCHARGING DRY WATER SOLUBLE HYGROSCOPIC MATERIAL INTO A CONICAL DISSOLVING CHAMBER AT A CONSTANT RATE SAID MATERIAL FALLING FROM THE DISCHARGE OF A DRY FEEDER THROUGH AN AIR SPACE INTO SAID DISSOLVING CHAMBER, (B) AT LEAST DURING THE DISCHARGE OF THE DRY HYGROSCOPIC POWDERED MATERIALS, FLUSHING SAID MATERIALS FROM SAID DISSOLVING CHAMBER WITH A STREAM OF WASH DOWN LIQUID INTRODUCED AT THE TOP OF SAID DISSOLVING CHAMBER AND FLOWING DOWN THE SIDES OF SAID DISSOLVING CHAMBER, (C) REMOVING SAID WASH DOWN LIQUID STREAM AND SAID DRY POWDERED MATERIAL THROUGH THE BOTTOM OUTLET OF SAID DISSOLVING CHAMBER UNDER THE VACUUM DRAWN BY A LIQUID OPERATED EJECTOR, THE VACUUM SIDE ARM OF WHICH COMMUNICATES SUBSTANTIALLY DIRECTLY WITH THE BOTTOM DISCHARGE OF SAID DISSOLVING CHAMBER, SAID WASH DOWN LIQUID FLOWING WITH SUFFICIENT VELOCITY AND AT A SUFFICIENT RATE TO PREVENT BRIDGING OF THE BOTTOM OUTLET BY THE DRY POWDERED MATERIAL AND AT INSUFFICIENTLY HIGH RATE TO OVERFLOW FROM SAID DISSOLVING CHAMBER, AND MAINTAINING A PASSAGE FOR AIR TO BE DRAWN FROM THE SPACE BETWEEN THE TOP OF THE DISSOLVING CHAMBER AND THE BOTTOM OF THE DRY FEEDER DISCHARGE DOWNWARD INTO THE THROAT OF THE EJECTOR, (D) PASSING A STREAM OF WORKING SOLUTION DRAWN FROM WORK TANKS INTO THE INLET OF SAID EJECTOR AT SUFFICIENT PRESSURE TO MAINTAIN A VACUUM ON THE SIDEARM OF THE EJECTOR, (E) CONDUCTING THE STREAM OF WORKING SOLUTION TOGETHER WITH THE DRY POWDERED MATERIAL AND AIR DRAWN INTO THE THROAT OF THE EJECTOR AWAY FROM THE OUTLET OF THE EJECTOR TO A POINT OF USE OF SAID WORKING SOLUTION.
References Cited (Backward Citations)
US3010615A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-20 | 1969-03-22 | 1969-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-20 | 1973-03-22 | 1973-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-20 | 1977-03-22 | 1977-09-21 | $7700.00 | Window Closed / Lapsed |