US3592446A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for continuous blending of granular materials
Assignee: Individual
•
Filing: 1969-05-19
•
Granted: 1971-07-13
•
Expires: 1989-05-19
Abstract
Abstract This invention relates to a method and apparatus for continuous blending of granular materials having the same or different particle size or density, comprising one or more containers tapered downwardly and inwardly, each having a stirrer rotatable about a vertical axis for stirring the granular material at the same time air is passed therethrough. Two or more stages in series may be arranged, either side-by-side or vertically in tandem, between which stages solids may be conveyed pneumatically or by gravity flow.
Inventors
- 👤 Max Leva
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:27
CPC Classifications
B; B01; B01F; B01F33/00; B01F33/40; B01F33/402; B01F33/80; B01F33/805
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
98 words
A multistage continuous blending apparatus for granular materials, comprising a first container including stirring means and aerating means for simultaneously stirring and aerating granular materials introduced into the top of the container, a second container also including stirring means and aerating means for simultaneously stirring and aerating the contents thereof, and a discharge pipe adjacent the bottom of the first container and leading into the second container and connected to a source of air so as to pneumatically conduct blended solids and air from the bottom of the first container through said discharge pipe to said second container.
Claim 2
Dependent Claim
98 words
A multistage continuous blending apparatus for granular materials, comprising a first container including stirring means and aerating means for simultaneously stirring and aerating granular materials introduced into the top of the container, a second container also including stirring means and aerating means for simultaneously stirring and aerating the contents thereof, and a discharge pipe adjacent the bottom of the first container and leading into the second container and connected to a source of air so as to pneumatically conduct blended solids and air from the bottom of the first container through said discharge pipe to said second container.
Claim 3
Dependent Claim
56 words
A multistage apparatus as recited in claim 1 wherein said discharge pipe for pneumatically conveying blended particles is connected to the top of said second container and wherein an air inlet valve introduces low-pressure air into the bottom of said second container and wherein an outlet valve discharges air from the top of said second container.
Claim 4
Dependent Claim
47 words
A multistage apparatus as recited in claim 1 wherein said discharge pipe for conducting blended particles from the first container is connected to the bottom of said second container, and means in said second container for preventing accumulation of granular material in the outlet of said pipe.
Claim 5
Dependent Claim
33 words
Apparatus as recited in claim 3 together with a discharge pipe and control valve therein disposed at the upper portion of said second container for regulating the level of mixed granular materials therein.
Claim 6
Dependent Claim
22 words
Apparatus as recited in claim 1 wherein said first and second containers are arranged vertically in tandem with a common stirrer shaft.
Claim 7
Dependent Claim
44 words
Apparatus as recited in claim 5 wherein a seal is provided at the bottom and discharge end of the top container, said seal formed of discharged granular material and held in place by a closure flange which surrounds the common shaft of said stirrer.
Claim 8
Dependent Claim
80 words
Apparatus as recited in claim 5 wherein the discharge outlet of the top container is in the form of a cylindrical portion of a downwardly tapered portion of the bottom of the container, a vertically adjustable trough surrounding the common stirring shaft for said containers, and means for adjustably spacing said trough from the bottom edge of said cylindrical portion so as to regulate the rate of discharge of blended particles discharged from the top container into the bottom container.
Claim 9
Dependent Claim
36 words
Apparatus as recited in claim 7 together with a bypass pipe leading from an intermediate portion of the top container to the top portion of the bottom container, and a regulating valve in said bypass pipe.
Claim 10
Dependent Claim
54 words
Apparatus as recited in claim 7 together with a pair of air inlet pipes, one connected to the bottom of the top container and the other, to the top of the bottom container, and a second bypass pipe connecting the top portions of said bottom and top containers and including a regulating valve therein.
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) | 1974-07-12 | 1975-01-11 | 1975-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-12 | 1979-01-11 | 1979-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-12 | 1983-01-11 | 1983-07-13 | $7700.00 | Window Closed / Lapsed |