US3749370A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mixing device for powdered materials
Assignee: Commissariat à l'Énergie Atomique et Aux Énergies Alternatives
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Filing: 1971-06-16
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Granted: 1973-07-31
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Expires: 1991-06-16
Abstract
Abstract The mixing device for powdered material and especially fissile material which remains geometrically subcritical even when a large quantity is present comprises a stationary cylindrical tank having a horizontal axis and obturatable openings for the introduction and withdrawal of materials ; a rotary drum which is coaxial with the tank and forms the internal wall of a substantially leak-tight annular space whose external wall is constituted by the tank; a core of neutron-moderating material located within the drum and covered with material having a high neutron capture cross-section ; stirring arms mounted on the external wall of the drum and means for driving the drum in rotation.
Inventors
- 👤 J Pasquiou
- 👤 J Regnier
- 👤 A Clech
- 👤 G Marchand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:30
CPC Classifications
B; B01; B01F; B01F27/00; B01F27/05; B01F27/11; B01F27/116; B01F27/1163; B01F27/11631; B01F27/60; B01F27/70; B01F2101/00; B01F2101/57; B01F27/21; B01F27/2122
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
93 words
A mixing device for powdered materials comprising: a stationary tank of revolution having a horizontal axis and provided with obturatable openings for the introduction and withdrawal of materials; a drum which is coaxial with the tank and forms the internal wall of a substantially leak-tight annular space whose external wall is constituted by said tank, said drum being adapted to carry stirring arms; and means for driving the drum in rotation about a horizontal axis and a core of neutronmoderating material covered with material having a high neutron capture cross-section in the drum.
Claim 2
Dependent Claim
93 words
A mixing device for powdered materials comprising: a stationary tank of revolution having a horizontal axis and provided with obturatable openings for the introduction and withdrawal of materials; a drum which is coaxial with the tank and forms the internal wall of a substantially leak-tight annular space whose external wall is constituted by said tank, said drum being adapted to carry stirring arms; and means for driving the drum in rotation about a horizontal axis and a core of neutronmoderating material covered with material having a high neutron capture cross-section in the drum.
Claim 3
Dependent Claim
22 words
A device according to claim 1, wherein the neutron-moderating material is constituted by a polyethylene cylinder covered with a sheet of cadmium.
Claim 4
Dependent Claim
23 words
A device according to claim 1, wherein the drum is occupied at least partially by a core of homogeneous neutron-moderating and neutron-absorbing material.
Claim 5
Dependent Claim
43 words
A device according to claim 1, wherein the drum is fixed on a driving shaft carried by a frame and has an axial length which is greater than that of the tank, sliding sealing means being interposed between the tank and the drum.
Claim 6
Dependent Claim
47 words
A device according to claim 1, wherein provision is made at the top of the tank for an inspection opening whose axial length represents a substantial fraction of the total length of the tank, said opening being intended to be closed by means of a leak-tight door.
Claim 7
Dependent Claim
48 words
A device according to claim 1, wherein the discharge opening for powdered materials which is placed at the bottom portion of the tank terminates in a transfer duct and can be sealed-off by a gate which is displaceable within said duct in a direction parallel to the axis.
References Cited (Backward Citations)
US3095349A
Cited
US3227136A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-30 | 1977-01-29 | 1977-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-30 | 1981-01-29 | 1981-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-30 | 1985-01-29 | 1985-07-31 | $7700.00 | Window Closed / Lapsed |