Patent US6424872B1 successfully refreshed from Google Patents.
US3673409A
Expired / Lapsed
US
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Irradiation apparatus for providing a high initial irradiation of the product
Assignee: Atomic Energy of Canada Ltd AECL
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Filing: 1970-03-27
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Granted: 1972-06-27
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Expires: 1990-03-27
Abstract
Abstract There is disclosed apparatus for the radioactive irradiation of products whose composition requires a relatively high intensity of irradiation for a short period followed by a relatively low intensity of irradiation for a longer period. In order to efficiently utilize the source, the product is passed into the center of a rack of source material and thereafter passed around the outside of the rack. The product is cooled by water during irradiation and the same water is used to effect rotation of the product.
Inventors
- 👤 William R Green
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:07
CPC Classifications
G; G21; G21K; G21K5/00; G21K5/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
130 words
Apparatus for the irradiation of products requiring at least a high initial irradiation intensity followed by irradiation at a relatively lower intensity, comprising: a radioactive source, a chamber surrounded by shielding, a bent passageway through said shielding into said chamber, a hollow elongate rack for holding said source in said chamber having an opening along the length thereof, an elongate product support, means for moving said product support through said passageway, into said opening and into and out of said source rack to give a high initial irradiation of said product, and means for moving said product support around the outside of said source rack to give a lower intensity irradiation of said product, said product support being suspended for movement with its longitudinal axis at all times substantially vertical.
Claim 2
Dependent Claim
130 words
Apparatus for the irradiation of products requiring at least a high initial irradiation intensity followed by irradiation at a relatively lower intensity, comprising: a radioactive source, a chamber surrounded by shielding, a bent passageway through said shielding into said chamber, a hollow elongate rack for holding said source in said chamber having an opening along the length thereof, an elongate product support, means for moving said product support through said passageway, into said opening and into and out of said source rack to give a high initial irradiation of said product, and means for moving said product support around the outside of said source rack to give a lower intensity irradiation of said product, said product support being suspended for movement with its longitudinal axis at all times substantially vertical.
Claim 3
Dependent Claim
30 words
Apparatus as defined in claim 1 wherein said product support is during irradiation continuously rotatable about said vertical axis, and wherein means are provided to effect rotation of the supports.
Claim 4
Dependent Claim
19 words
Apparatus as defined in claim 2 wherein said product support is cooled by jets of cooling liquid during irradiation.
Claim 5
Dependent Claim
23 words
Apparatus as defined in claim 3 wherein the means to rotate said supports comprises vanes on the supports against which said jets impinge.
Claim 6
Dependent Claim
25 words
Apparatus as defined in claim 4 further including a plurality of actuators for effecting movements of said supports into, out of and around said rack.
Claim 7
Dependent Claim
21 words
Apparatus as defined in claim 5 further including program control means for scheduling the movement of said containers and timing thereof.
References Cited (Backward Citations)
US3142759A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |