US3910564A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Structure for foundry slurry viscosity reduction
Assignee: Harry W Dietert Co
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Filing: 1972-04-17
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Granted: 1975-10-07
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Expires: 1992-04-17
Abstract
Abstract Structure for and the method of decreasing the viscosity of foundry sand additive slurries by the use of up to 3 percent of sodium silicate or potassium silicate in the foundry sand additive slurries to provide a workable slurry having a high percentage of solids therein for foundry sand requiring a high ratio of additives to water for proper tempering and rebonding thereof.
Inventors
- 👤 Alexander L Graham
- 👤 Robert L Cleland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 01:01
CPC Classifications
B; B28; B28C; B28C9/00; B28C9/002; B01; B01F; B01F23/00; B01F23/50; B01F23/59
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
102 words
Structure for producing foundry sand additive slurry comprising an additive slurry tank, means operably associated with the slurry tank for first adding water to the slurry tank, means operably associated with the slurry tank for determining the amount of a viscosity reducing agent to be initially added to the water in the additive slurry tank as a proportion of dry additive to be added to the water in the additive slurry tank, means for then metering the viscosity reducing agent into the water in the additive slurry tank, and means for feeding the amount of dry additives into the additive slurry tank.
Claim 2
Dependent Claim
102 words
Structure for producing foundry sand additive slurry comprising an additive slurry tank, means operably associated with the slurry tank for first adding water to the slurry tank, means operably associated with the slurry tank for determining the amount of a viscosity reducing agent to be initially added to the water in the additive slurry tank as a proportion of dry additive to be added to the water in the additive slurry tank, means for then metering the viscosity reducing agent into the water in the additive slurry tank, and means for feeding the amount of dry additives into the additive slurry tank.
Claim 3
Dependent Claim
178 words
Structure for producing foundry sand additive slurry comprising an additive slurry tank, means operably associated with the slurry tank for adding water to the slurry tank, means Operably associated with the slurry tank for adding a dry additive to the slurry tank, means operably associated with the slurry tank for metering a viscosity reducing agent for the dry additive and water in the slurry tank into the tank, and means operably associated with the slurry tank and the means for adding a dry additive to the slurry tank for adding a first fixed percentage of the dry additive by weight of the viscosity reducing agent to the water in the slurry tank before the dry additive enters the water in the slurry tank so that a high percentage of solids may be present in the slurry in the tank for a given slurry viscosity and tempering of foundry sand or the like may be accomplished with the slurry even though the foundry sand may require a high percentage of additives in relation to the tempering water required thereby.
Claim 4
Dependent Claim
178 words
Structure for producing foundry sand additive slurry comprising an additive slurry tank, means operably associated with the slurry tank for adding water to the slurry tank, means Operably associated with the slurry tank for adding a dry additive to the slurry tank, means operably associated with the slurry tank for metering a viscosity reducing agent for the dry additive and water in the slurry tank into the tank, and means operably associated with the slurry tank and the means for adding a dry additive to the slurry tank for adding a first fixed percentage of the dry additive by weight of the viscosity reducing agent to the water in the slurry tank before the dry additive enters the water in the slurry tank so that a high percentage of solids may be present in the slurry in the tank for a given slurry viscosity and tempering of foundry sand or the like may be accomplished with the slurry even though the foundry sand may require a high percentage of additives in relation to the tempering water required thereby.
Claim 5
Dependent Claim
26 words
Structure as set forth in claim 2 wherein the dry additive is a bentonite and the viscosity reducing agent is one of sodium and potassium silicate.
Claim 6
Dependent Claim
138 words
Structure for producing foundy sand additive slurry comprising an additive slurry tank, means operably associated with the slurry tank for adding water to the slurry tank, means operably associated with the slurry tank for adding a dry additive to the slurry tank, means operably associated with the slurry tank for metering a viscosity reducing agent for the dry additive and water in the slurry tank into the tank, means for adding a first fixed percentage of the dry additive by weight of the viscosity reducing agent to the water in the slurry tank before the dry additive enters the water in the slurry tank, and means for subsequently adding an additional amount of viscosity reducing agent to the slurry in accordance with the viscosity of the slurry having the first fixed percentage of the viscosity agent added thereto.
Claim 7
Dependent Claim
138 words
Structure for producing foundy sand additive slurry comprising an additive slurry tank, means operably associated with the slurry tank for adding water to the slurry tank, means operably associated with the slurry tank for adding a dry additive to the slurry tank, means operably associated with the slurry tank for metering a viscosity reducing agent for the dry additive and water in the slurry tank into the tank, means for adding a first fixed percentage of the dry additive by weight of the viscosity reducing agent to the water in the slurry tank before the dry additive enters the water in the slurry tank, and means for subsequently adding an additional amount of viscosity reducing agent to the slurry in accordance with the viscosity of the slurry having the first fixed percentage of the viscosity agent added thereto.
Claim 8
Dependent Claim
26 words
Structure as set forth in claim 4 wherein the dry additive is a bentonite and the viscosity reducing agent is one of sodium and potassium silicate.
Claim 9
Dependent Claim
62 words
Structure as set forth in claim 4 wherein the means for adding an additional amount of sodium or potassium silicate to the slurry comprises a viscosity sensor transmitter for providing a signal proportional to the viscosity of the slurry and a viscosity receiver for controlling the additional amount of sodium or potassium silicate in accordance with the sensed viscosity of the slurry.
Claim 10
Dependent Claim
194 words
Structure for producing foundry sand additive slurry comprising an additive slurry tank, means operably associated with the slurry tank for adding water to the slurry tank, means operably associated with the slurry tank for adding a dry additive to the slurry tank, means operably associated with the slurry tank for metering a viscosity reducing agent for the dry additive and water in the slurry tank into the tank, and means for first adding 1 percent by weight of the dry additive of the viscosity reducing agent to the water used in forming the additive slurry and means for subsequently adding an additional amount up to 2 percent of the viscosity reducing agent to the additive slurry in accordance with the viscosity of the additive slurry to which the initial 1 percent of the viscosity reducing agent has been added so that a high percentage of solids may be present in the slurry in the tank for a given slurry viscosity and tempering of foundry sand or the like may be accomplished with the slurry even though the foundry sand may require a high percentage of additives in relation to the tempering water required thereby.
Claim 11
Dependent Claim
194 words
Structure for producing foundry sand additive slurry comprising an additive slurry tank, means operably associated with the slurry tank for adding water to the slurry tank, means operably associated with the slurry tank for adding a dry additive to the slurry tank, means operably associated with the slurry tank for metering a viscosity reducing agent for the dry additive and water in the slurry tank into the tank, and means for first adding 1 percent by weight of the dry additive of the viscosity reducing agent to the water used in forming the additive slurry and means for subsequently adding an additional amount up to 2 percent of the viscosity reducing agent to the additive slurry in accordance with the viscosity of the additive slurry to which the initial 1 percent of the viscosity reducing agent has been added so that a high percentage of solids may be present in the slurry in the tank for a given slurry viscosity and tempering of foundry sand or the like may be accomplished with the slurry even though the foundry sand may require a high percentage of additives in relation to the tempering water required thereby.
Claim 12
Dependent Claim
32 words
Structure as set forth in claim 7 wherein the dry additive is at least one of sodium and calcium bentonite and the viscosity reducing agent is one of sodium and potassium silicate.
Claim 13
Dependent Claim
175 words
Structure for producing foundry sand additive slurry comprising an additive slurry tank, means operably associated with the slurry tank for first adding water to the slurry tank, means operably associated with the slurry tank for determining the amount of viscosity reducing agent to be initially Added to the water in the slurry tank as a proportion of the dry additive to be added to the water in the additive slurry tank, means for then metering the viscosity reducing agent into the water in the additive slurry tank, means for feeding the amount of dry additives into the additive slurry tank, means for sensing the viscosity of the mixed water, dry additive and viscosity reducing agent in the additive slurry tank operably associated with the additive slurry tank, and means operably associated with the viscosity sensing means for metering an additional amount of viscosity reducing agent into the additive slurry tank in accordance with the viscosity of the slurry in the slurry tank up to a maximum of 2 percent by weight of the dry additive.
Claim 14
Dependent Claim
175 words
Structure for producing foundry sand additive slurry comprising an additive slurry tank, means operably associated with the slurry tank for first adding water to the slurry tank, means operably associated with the slurry tank for determining the amount of viscosity reducing agent to be initially Added to the water in the slurry tank as a proportion of the dry additive to be added to the water in the additive slurry tank, means for then metering the viscosity reducing agent into the water in the additive slurry tank, means for feeding the amount of dry additives into the additive slurry tank, means for sensing the viscosity of the mixed water, dry additive and viscosity reducing agent in the additive slurry tank operably associated with the additive slurry tank, and means operably associated with the viscosity sensing means for metering an additional amount of viscosity reducing agent into the additive slurry tank in accordance with the viscosity of the slurry in the slurry tank up to a maximum of 2 percent by weight of the dry additive.
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) | 1978-10-06 | 1979-04-07 | 1979-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-06 | 1983-04-07 | 1983-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-06 | 1987-04-07 | 1987-10-07 | $7700.00 | Window Closed / Lapsed |