US4427610A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for curing concrete products
Assignee: COMGER/MURRAY SYSTEMS Inc A CORP OF FL
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Filing: 1982-01-06
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Granted: 1984-01-24
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Expires: 2002-01-06
Abstract
Abstract A method and apparatus for rapidly manufacturing concrete or like poducts having an advanced state of cure by blending together a calcareous cementitious binder, aggregate, and water to form a mix, molding the mixture to have a predetermined shape and exposing the shape to an atmosphere in a chambr consisting essentially of carbon dioxide gas, wherein ultracold carbon dioxide gas is fed to said chamber during the movement of the shape therein and continuing the feed so as to cause an exothermic temperature rise in the shape.
Inventors
- 👤 John A. Murray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 01:59
CPC Classifications
B; B28; B28B; B28B11/00; B28B11/24; B28B11/245; C; C04; C04B; C04B28/00; C04B28/02; C04B28/04; C04B40/00; C04B40/02; C04B40/0231
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
122 words
In a method of rapidly manufacturing concrete or like products having an advanced state of cure by blending together a calcareous cementitious binder, aggregate, and water to form a mix, molding the mixture to have a predetermined shape and exposing the molded product to an atmosphere in a chamber consisting of at least 95%, excluding water vapor, carbon dioxide gas, the improvement which comprises feeding carbon dioxide gas at a temperature in the range of about 0° to -70° F. to said chamber during the movement of the molded product therein, continuing the feed so as to cause an exothermic temperature rise in the molded product and exposing the molded product to the carbon dioxide gas for no more than 5 minutes.
Claim 2
Dependent Claim
122 words
In a method of rapidly manufacturing concrete or like products having an advanced state of cure by blending together a calcareous cementitious binder, aggregate, and water to form a mix, molding the mixture to have a predetermined shape and exposing the molded product to an atmosphere in a chamber consisting of at least 95%, excluding water vapor, carbon dioxide gas, the improvement which comprises feeding carbon dioxide gas at a temperature in the range of about 0° to -70° F. to said chamber during the movement of the molded product therein, continuing the feed so as to cause an exothermic temperature rise in the molded product and exposing the molded product to the carbon dioxide gas for no more than 5 minutes.
Claim 3
Dependent Claim
16 words
The method of claim 1, wherein the molded product has a temperature of about 60°-95° F.
Claim 4
Dependent Claim
13 words
The method of claim 1, wherein the calcareous cementitious binder is portland cement.
Claim 5
Dependent Claim
12 words
The method of claim 2, wherein said molded product is a block.
Claim 6
Dependent Claim
20 words
The method of claim 1, wherein the pressure of the carbon dioxide gas entering the chamber is about 0-10 PSIG.
Claim 7
Dependent Claim
22 words
The method of claim 1, wherein the mix contains only sufficient water for the molded product or article to retain its shape.
Claim 8
Independent Claim
154 words
A method of rapidly manufacturing building blocks products having an advanced state of cure comprising the steps of blending together portland cement, aggregate, and water in selected quantities sufficient to form a sufficiently low moisture mix to maintain its shape after molding into a shape during the subsequent curing, molding the mixture to have a predetermined shape, maintaining the molded product at a temperature of 60°-65° F., exposing the molded product having a temperature of 60°-65° F. to an atmosphere of at least 95%, excluding water vapor, carbon dioxide gas by moving the molded product through a chamber while feeding carbon dioxide gas at a temperature in the range of about 0° to -70° F. to the chamber during the movement of the molded product therein and continuing the exposure of the molded product to the carbon dioxide gas feed for a time sufficient to cause an exothermic temperature rise in the molded product.
Claim 9
Independent Claim
154 words
A method of rapidly manufacturing building blocks products having an advanced state of cure comprising the steps of blending together portland cement, aggregate, and water in selected quantities sufficient to form a sufficiently low moisture mix to maintain its shape after molding into a shape during the subsequent curing, molding the mixture to have a predetermined shape, maintaining the molded product at a temperature of 60°-65° F., exposing the molded product having a temperature of 60°-65° F. to an atmosphere of at least 95%, excluding water vapor, carbon dioxide gas by moving the molded product through a chamber while feeding carbon dioxide gas at a temperature in the range of about 0° to -70° F. to the chamber during the movement of the molded product therein and continuing the exposure of the molded product to the carbon dioxide gas feed for a time sufficient to cause an exothermic temperature rise in the molded product.
Claim 10
Dependent Claim
19 words
The method of claim 7, wherein the pressure of the carbon dioxide gas entering the chamber is 0-10 PSIG.
Claim 11
Dependent Claim
22 words
The method of claim 7, wherein the movement of the molded product through said chamber is for a period of 1-2 minutes.
Claim 12
Dependent Claim
112 words
In an apparatus for the manufacture of concrete and like products having means for blending a desired cementitious mixture, means for molding the mixture to desired configurations, and for delivering the molded product thus formed for movement along a predetermined path, conveying means for moving the molded product thus formed to and through a chamber means, and chamber means substantially closed against the introduction of external air of the like for exposing the molded product to carbon dioxide gas during the movement thereof through the chamber means, the improvement which comprises means for feeding carbon dioxide gas at a temperature in the range of about 0° to -70° F. into said chamber.
Claim 13
Dependent Claim
112 words
In an apparatus for the manufacture of concrete and like products having means for blending a desired cementitious mixture, means for molding the mixture to desired configurations, and for delivering the molded product thus formed for movement along a predetermined path, conveying means for moving the molded product thus formed to and through a chamber means, and chamber means substantially closed against the introduction of external air of the like for exposing the molded product to carbon dioxide gas during the movement thereof through the chamber means, the improvement which comprises means for feeding carbon dioxide gas at a temperature in the range of about 0° to -70° F. into said chamber.
Claim 14
Dependent Claim
30 words
The apparatus of claim 10, including means for preheating the molded product during their movement along the path just prior to entry of the molded product into the chamber means.
Claim 15
Dependent Claim
44 words
The apparatus of claim 10, wherein the carbon dioxide feed is at a height above the molded product of about 1 to about 4 times the height of the molded product and the carbon dioxide is fed into the chamber along the chamber length.
Claim 16
Dependent Claim
41 words
The apparatus of claim 10 having molded product inlet means and molded product outlet means at ends thereof, with the chamber being substantially closed against external environment except at ends thereof, said chamber having openable closure means at said ends thereof.
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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) | 1987-01-23 | 1987-07-25 | 1988-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-23 | 1991-07-25 | 1992-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-23 | 1995-07-25 | 1996-01-24 | $7700.00 | Window Closed / Lapsed |