US3569714A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protected radioisotopic heat source
Assignee: United States Atomic Energy Commission
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Filing: 1969-11-14
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Granted: 1971-03-09
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Expires: 1989-11-14
Abstract
Abstract A radioisotopic heat source including a container with plurality of closed chambers cooperating to preserve integrity of the contained radioactive heat source against impacts, projectiles, extreme temperatures, and other various environmental conditions pertaining to missiles for carrying the heat source into outer space and landing it on the moon.
Inventors
- 👤 Charles G Anderson
- 👤 Vincent L Avona
- 👤 Donald P Kelly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:39
CPC Classifications
G; G21; G21H; G21H3/00; B; B64; B64G; B64G1/00; B64G1/22; B64G1/42; B64G1/421; B64G1/422; G21F; G21F5/00; G21F5/015
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
142 words
A radioisotopic heater for carrying a radioactive heat source material and protecting the same from extreme environmental conditions of impact, explosion, heat, and chemicals comprising; a first container for containing said radioactive heat source material, a second container enclosing said first container for assuring a complete enclosure of said radioactive heat source material, an oxidation barrier cladding container enclosing said second container, a fragmentation shield container enclosing said oxidation barrier container for providing physical and chemical strength to sad heater, a high temperature insulator container enclosing said fragmentation shield container, an ablative heat shield container enclosing said high temperature insulator container, an outer closure container enclosing all of said other containers, and means including a heat conducting plate secured to another surface of said outer closure container for contacting a utilization device and transferring heat from said containers to said utilization device.
Claim 2
Dependent Claim
142 words
A radioisotopic heater for carrying a radioactive heat source material and protecting the same from extreme environmental conditions of impact, explosion, heat, and chemicals comprising; a first container for containing said radioactive heat source material, a second container enclosing said first container for assuring a complete enclosure of said radioactive heat source material, an oxidation barrier cladding container enclosing said second container, a fragmentation shield container enclosing said oxidation barrier container for providing physical and chemical strength to sad heater, a high temperature insulator container enclosing said fragmentation shield container, an ablative heat shield container enclosing said high temperature insulator container, an outer closure container enclosing all of said other containers, and means including a heat conducting plate secured to another surface of said outer closure container for contacting a utilization device and transferring heat from said containers to said utilization device.
Claim 3
Dependent Claim
67 words
The heater of claim 1 wherein said first and second containers are of tantalum-10 weight percent tungsten, said oxidation barrier container is of platinum-10 weight percent rhodium; said fragmentation shield container is of titanium; said high temperature insulator container is of fibrous graphite; said ablative heat shield container is of graphite; said outer closure container is of stainless steel; and said heat conducting plate is of aluminum.
Claim 4
Dependent Claim
32 words
The heater of claim 1 wherein said ablative heat shield has a wall thickness no less than that of the combined wall thicknesses of said fragmentation shield and said high temperature insulator.
Claim 5
Dependent Claim
22 words
The heater of claim 1 wherein said fragmentation shield container is of generally U-shaped cross section with an end cap cooperating therewith.
Claim 6
Dependent Claim
14 words
The heater of claim 1 wherein the radioactive heat source comprises plutonium oxide microspheres.
Claim 7
Dependent Claim
12 words
The heater of claim 1 wherein said containers are right circular cylinders.
Claim 8
Dependent Claim
14 words
The heater Of claim 6 wherein said containers have diameters about equal to height.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-08 | 1974-09-07 | 1975-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-08 | 1978-09-07 | 1979-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-08 | 1982-09-07 | 1983-03-09 | $7700.00 | Window Closed / Lapsed |