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US3690730A Expired / Lapsed US ⏱️ 0.0 years remaining

Apparatus for unloading pulverized material in tank

Assignee: Mitsui Engineering and Shipbuilding Co Ltd
•
Filing: 1971-02-17
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Granted: 1972-09-12
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Expires: 1991-02-17
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Abstract

Abstract A device for creating a slurry of pulverized material in a tank including a rotating cylindrical body having an adjustable nozzle therein for jetting the high-pressure water against the material in the tank. A sump is provided adjacent the bottom of the tank around the rotary cylindrical body and means is provided for injecting water into the sump to control the fluidity of the pulverized material falling into the sump. Detection rods are provided to detect the total amount of material in the tank and to detect the amount of pulverized material which is compacted against the sides of the tank. Controls are provided to regulate the flow and orientation of flow of water through the two nozzles and the orientation of the rotating nozzle to break down the caking of the pulverized material and to effect efficient discharge of the slurry of material from the tank.

Inventors

  • 👤 Masanobu Sakata
  • 👤 Keniti Nagata
  • 👤 Shigeru Nagamori

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-30 08:35
CPC Classifications
B; B65; B65G; B65G53/00; B65G53/30

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 149 words
An apparatus for unloading pulverized material in a tank by turning said material into slurry comprising a rotary cylindrical body rotatably provided extending through a sump at the bottom of the tank, a nozzle provided rotatably in the vertical plane at the top of said rotary cylindrical body, means for rotating said rotary cylindrical body, means for transmitting the rotating motion to said nozzle to rotate it, means for adjusting the nozzle angle in accordance with the angle of the surface of rupture of the pulverized material mass in the tank, means for controlling the rotating velocity of said rotary cylindrical body, pump and piping systems for feeding high pressure water into said rotary cylindrical body, and means for controlling the amount of high pressure water in accordance with the slurry concentration, said high pressure water being passed through said rotary cylindrical body and jetted out through said nozzle.
Claim 2
Independent Claim 149 words
An apparatus for unloading pulverized material in a tank by turning said material into slurry comprising a rotary cylindrical body rotatably provided extending through a sump at the bottom of the tank, a nozzle provided rotatably in the vertical plane at the top of said rotary cylindrical body, means for rotating said rotary cylindrical body, means for transmitting the rotating motion to said nozzle to rotate it, means for adjusting the nozzle angle in accordance with the angle of the surface of rupture of the pulverized material mass in the tank, means for controlling the rotating velocity of said rotary cylindrical body, pump and piping systems for feeding high pressure water into said rotary cylindrical body, and means for controlling the amount of high pressure water in accordance with the slurry concentration, said high pressure water being passed through said rotary cylindrical body and jetted out through said nozzle.
Claim 3
Dependent Claim 36 words
Apparatus according to claim 1 including an auxiliary nozzle in the sump at the bottom of the tank and means for projecting low pressure water through said nozzle to control the slurry concentration in the sump.
Claim 4
Dependent Claim 18 words
Apparatus according to claim 1 including a detector rod for sensing the amount of material in the tank.
Claim 5
Dependent Claim 26 words
Apparatus according to claim 1 including a detector rod for sensing the angle of the surface of rupture of the pulverized material mass in the tank.

References Cited (Backward Citations)

US2957493A Cited
US1624865A Cited
US1838710A Cited
US1818967A Cited
US2245554A Cited
US2245575A Cited
US2302299A Cited
US2820701A Cited
US2954038A Cited
US3564584A Cited
US3552799A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1975-09-12 1976-03-13 1976-09-12 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1979-09-12 1980-03-13 1980-09-12 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1983-09-12 1984-03-13 1984-09-12 $7700.00 Window Closed / Lapsed

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