US3871627A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chemical mixer
Assignee: CHEMIX CORP
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Filing: 1973-02-26
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Granted: 1975-03-18
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Expires: 1993-02-26
Abstract
Abstract Apparatus for mixing dry chemical with a liquid including a mixing tank having a feed passage defined above the bottom wall thereof through which dry chemical is fed into the mixing tank. Wetting means is provided for wetting the dry chemical as it falls into the mixing tank, the wetting means including first spray means located on one side of the path of the dry chemical and second spray means located on the opposite side of the path of the dry chemical. The streams of liquid from the first and second spray means intercept each other substantially in the path of the dry chemical so that the dry chemical passes through the intercepting streams and is wetted thereby as it falls into the mixing tank. The apparatus further includes a detention tank located beneath the mixing tank, and valve means for controlling communication between the mixing tank and the holding tank. The valve is controlled by condition responsive means for operating the valve between open and closed positions in response to preselected conditions in the mixing tank.
Inventors
- 👤 Arthur R Marshall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:23
CPC Classifications
B; B01; B01F; B01F25/00; B01F25/70; B01F25/72; B01F25/721
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
137 words
Apparatus for mixing dry chemical with a liquid comprising: a mixing tank having a feed passage defined above the bottom wall thereof through which dry chemical is fed into the mixing tank and falls toward the bottom of the mixing tank into any liquid contained therein; and prewetting means for prewetting the dry chemical as it falls into the mixing tank from said passage, said prewetting means comprising a plurality of spray heads located on one side of the path of dry chemical falling from said passage and including a plurality of fluid nozzles for spraying liquid generally horizontally into the path of the dry chemical, and a fan nozzle located on the opposite side of the path of dry chemical falling from said passage for spraying liquid in a fanshaped stream generally downwardly toward said bottom.
Claim 2
Dependent Claim
137 words
Apparatus for mixing dry chemical with a liquid comprising: a mixing tank having a feed passage defined above the bottom wall thereof through which dry chemical is fed into the mixing tank and falls toward the bottom of the mixing tank into any liquid contained therein; and prewetting means for prewetting the dry chemical as it falls into the mixing tank from said passage, said prewetting means comprising a plurality of spray heads located on one side of the path of dry chemical falling from said passage and including a plurality of fluid nozzles for spraying liquid generally horizontally into the path of the dry chemical, and a fan nozzle located on the opposite side of the path of dry chemical falling from said passage for spraying liquid in a fanshaped stream generally downwardly toward said bottom.
Claim 3
Dependent Claim
51 words
Apparatus as claimed in claim 1 wherein said plurality of parallel spray heads depend toward the bottom of said mixing tank, each of said spray heads being formed with a plurality of said fluid nozzles defined by outlets through which liquid is sprayed substantially horizontally toward the path of dry chemical.
Claim 4
Dependent Claim
64 words
Apparatus as claimed in claim 1 further including a detention tank located beneath said mixing tank, an opening in the bottom wall of said mixing tank, valve means for controlling communication between said mixing tank and said detention tank through said opening, and condition responsive means for operating said valve between open and closed positions in response to preselected conditions in said mixing tank.
Claim 5
Dependent Claim
105 words
Apparatus as claimed in claim 3 wherein said valve means comprises a tube in said mixing tank extending through said opening, a valve seat in said tube near said openIng, flow metering apertures in the wall of said tube above said valve seat providing communication between said mixing tank and the interior of said tube, and a valve element in said tube movable between open and closed positions with respect to said valve seat to respectively permit flow from said mixing tank through said apertures and said valve seat into said detention tank, and to shut off communication between said mixing tank and detention tank.
Claim 6
Dependent Claim
47 words
Apparatus as claimed in claim 4 wherein said valve means further includes a spring biasing said valve element to its open position, and said condition responsive means includes a solenoid operable when energized to actuate said valve to its closed position against the bias of said spring.
Claim 7
Dependent Claim
39 words
Apparatus as claimed in claim 5 wherein said valve seat comprises a cylindrical member secured to the inner wall of said tube near said opening, the upper edge thereof being chamfered downwardly and outwardly to define said valve seat.
Claim 8
Dependent Claim
66 words
Apparatus as claimed in claim 5 further including level sensing means in said mixing tank, said solenoid being electrically connected with said level sensing means such that said solenoid is energized to close said valve element at a preselected low liquid level in said mixing tank and is deenergized to permit said valve element to open at a preselected high liquid level in said mixing tank.
Claim 9
Dependent Claim
171 words
Apparatus for mixing dry chemical with a liquid comrpising: a mixing tank having a feed passage defined above the bottom wall thereof through which dry chemical is fed into the mixing tank and falls toward the bottom of the mixing tank and any liquid contained therein; metering means for metering the dry chemical into the mixing tank such that the dry chemical enters the mixing tank at a controlled rate; prewetting means for wetting the stream of dry chemical as it is fed into the mixing tank through said feed passage by said metering means; agitating means in said mixing tank for agitating and mixing the liquid and dry chemical in the mixing tank; a detention tank located beneath said mixing tank; an opening in the bottom wall of said mixing tank; valve means controlling communication between said mixing tank and said detention tank through said opening; and condition responsive control means for operating said valve means between open and closed positions in response to preselected conditions in said mixing tank.
Claim 10
Dependent Claim
171 words
Apparatus for mixing dry chemical with a liquid comrpising: a mixing tank having a feed passage defined above the bottom wall thereof through which dry chemical is fed into the mixing tank and falls toward the bottom of the mixing tank and any liquid contained therein; metering means for metering the dry chemical into the mixing tank such that the dry chemical enters the mixing tank at a controlled rate; prewetting means for wetting the stream of dry chemical as it is fed into the mixing tank through said feed passage by said metering means; agitating means in said mixing tank for agitating and mixing the liquid and dry chemical in the mixing tank; a detention tank located beneath said mixing tank; an opening in the bottom wall of said mixing tank; valve means controlling communication between said mixing tank and said detention tank through said opening; and condition responsive control means for operating said valve means between open and closed positions in response to preselected conditions in said mixing tank.
Claim 11
Dependent Claim
105 words
Apparatus as claimed in claim 8 wherein said valve means comprises a tube in said mixing tank and extending through said opening, a valve seat in said tube near said opening, flow metering apertures in the wall of said tube above said valve seat providing communication between said mixing tank and the interior of said tube, and a valve element in said tube movable between open and closed positions with respect to said valve seat to respectively permit flow from said mixing tank through said apertures and said opening into said detention tank, and to shut off communication between said mixing tank and detention tank.
Claim 12
Dependent Claim
39 words
Apparatus as claimed in claim 9 wherein said valve seat comprises a cylindrical member secured to the inner wall of said tube near said opening, the upper edge thereof being chamfered downwardly and outwardly to define said valve seat.
Claim 13
Dependent Claim
22 words
Apparatus as claimed in claim 10 wherein said valve means further includes a spring biasing said valve element to its open position.
Claim 14
Dependent Claim
33 words
Apparatus as claimed in claim 11 wherein said condition responsive control means includes a solenoid operable when energized to actuate said valve element to its closed position against the bias of said spring.
Claim 15
Dependent Claim
63 words
Apparatus as claimed in claim 12 wherein said condition responsive control means further includes level sensing means electrically connected with said solenoid such that said solenoid is energized to close said valve element at a preselected low liquid level in said mixing tank and is deenergized to permit said valve element to open at a preselected high liquid level in said mixing Tank.
Claim 16
Dependent Claim
44 words
Apparatus as claimed in claim 13 wherein said condition responsive control means further includes a timer electrically connected with said agitator and said solenoid operable to interrupt operation of said agitator and deenergize said solenoid after a preselected period of operation of said agitator.
Claim 17
Independent Claim
118 words
An apparatus for mixing dry chemical with a liquid wherein the dry chemical is metered into a mixing tank through a feed passage at a controlled rate and is prewetted by a prewetting assembly as it falls toward the bottom of the mixing tank, the improvement wherein said prewetting assembly comprises a plurality of spray heads located on one side of the path of the dry chemical falling from said passage and including a plurality of fluid nozzles for spraying liquid into the path of the dry chemical in a substantially horizontal direction and a fan nozzle located on the opposite side of the path of the dry chemical for spraying liquid in a fan-shaped stream generally downwardly.
Claim 18
Independent Claim
118 words
An apparatus for mixing dry chemical with a liquid wherein the dry chemical is metered into a mixing tank through a feed passage at a controlled rate and is prewetted by a prewetting assembly as it falls toward the bottom of the mixing tank, the improvement wherein said prewetting assembly comprises a plurality of spray heads located on one side of the path of the dry chemical falling from said passage and including a plurality of fluid nozzles for spraying liquid into the path of the dry chemical in a substantially horizontal direction and a fan nozzle located on the opposite side of the path of the dry chemical for spraying liquid in a fan-shaped stream generally downwardly.
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) | 1978-03-17 | 1978-09-16 | 1979-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-17 | 1982-09-16 | 1983-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-17 | 1986-09-16 | 1987-03-18 | $7700.00 | Window Closed / Lapsed |