US3838289A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radioactive waste filter removal system
Assignee: GILBERT ASS INC US
•
Filing: 1972-08-29
•
Granted: 1974-09-24
•
Expires: 1992-08-29
Abstract
Abstract A radioactive waste filter cartridge removal apparatus comprising a shielding cask having removable top and bottom lids and a support collar integrally secured to the outer wall of the cask for support on a shouldered and shimmed support. Two lowering assemblies comprising rods extending vertically through said support collar at diametrically opposite sides of the cask are provided for effecting lowering movements of the bottom lid. One of said rods has its lower end welded to the peripheral portion of the bottom lid whereby such lid may be rotated about the axis of the rod and thus clear the bottom opening of the cask to permit vertical downward movement of the filter cartridge through such opening. A grappling tool and viewer are mounted on the top lid.
Inventors
- 👤 D White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:17
CPC Classifications
G; G21; G21F; G21F7/00; G21F7/015; G21F5/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
97 words
A cask for shielding radioactive waste filter cartridges comprising a cylindrical container with open ends and having removable circular top and bottom lids for detachably covering said open ends, a support collar integrally secured to the outer wall of said cylindrical container, a lowering rod mounted on said support collar for effecting lowering of said bottom lid and pivotal movement of said bottom lid about the axis of said lowering rod, whereby the bottom lid may be moved aside from the lower opening of said cask to permit vertical lowering therethrough of the radioactive waste filter cartridge.
Claim 2
Dependent Claim
97 words
A cask for shielding radioactive waste filter cartridges comprising a cylindrical container with open ends and having removable circular top and bottom lids for detachably covering said open ends, a support collar integrally secured to the outer wall of said cylindrical container, a lowering rod mounted on said support collar for effecting lowering of said bottom lid and pivotal movement of said bottom lid about the axis of said lowering rod, whereby the bottom lid may be moved aside from the lower opening of said cask to permit vertical lowering therethrough of the radioactive waste filter cartridge.
Claim 3
Dependent Claim
47 words
A cask as recited in claim 1 together with a grappling tool mounted on and extending through said top lid and including a vertical rod, the turning of which in one direction or in an opposite direction will effect opening and closing movements of the grappling tool.
Claim 4
Dependent Claim
66 words
A cask as recited in claim 1 together with a second lowering rod mounted on said support collar diametrically opposite said first mentioned lowering rod for detachably supporting a hook shaped extension from said bottom lid which is adapted to hook about said second lowering rOd to permit detachment and lateral swinging movement of said bottom lid about the axis of said first mentioned lowering rod.
Claim 5
Dependent Claim
57 words
A cask as recited in claim 1 together with a plurality of plugs at different radii on said top lid through which an extension for a wrench may be inserted and projected throughout the entire height and beyond the lower end of said cask to permit unscrewing of bolts on the cartridge when located below the cask.
Claim 6
Dependent Claim
26 words
A cask as recited in claim 1 together with a viewing apparatus mounted in said top lid to permit viewing of the interior of said cask.
Claim 7
Dependent Claim
32 words
A cask as recited in claim 2 wherein said grappling tool is provided with an elongated removable extension projecting upwardly from said top cask lid, and a shield enclosing said removable extension.
Claim 8
Dependent Claim
87 words
A cask as recited in claim 1 together with a second support rod diametrically opposite said first-mentioned support rod and extending vertically through said support collar, a plurality of vertically disposed ball bushings and retaining rings for mounting said rods and which are attached to diametrical opposite outer surface portions of said cask, the said first-mentioned support rod having its lower end welded to said bottom lid so that rotation thereof about its axis will swing said bottom lid away from the lower opening of said cask.
Claim 9
Dependent Claim
32 words
A cask as recited in claim 1 together with a base having a circular shoulder for supporting said support collar, and shim means surrounding said support collar and supported by said shoulder.
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) | 1977-09-23 | 1978-03-25 | 1978-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-23 | 1982-03-25 | 1982-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-23 | 1986-03-25 | 1986-09-24 | $7700.00 | Window Closed / Lapsed |