Patent US3571850A successfully refreshed from Google Patents.
US3571850A
Expired / Lapsed
US
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Hot-isostatic-pressing apparatus
Assignee: United States Atomic Energy Commission
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Filing: 1969-04-15
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Granted: 1971-03-23
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Expires: 1989-04-15
Abstract
Abstract An improved bell assembly is provided for use in a hotisostatic-pressing apparatus wherein a gas provides the material pressing and heating medium. The thermal insulating and sealing properties of the bell assembly substantially enhance the efficiency of the natural-convection, closed-loop gas heating system by significantly decreasing heat losses and gas escape.
Inventors
- 👤 Herbert A Pohto
- 👤 Carl D St Onge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:30
CPC Classifications
B; B30; B30B; B30B11/00; B30B11/001; B30B11/002; B01; B01J; B01J3/00; B01J3/06; B01J3/065; B22; B22F; B22F3/00; B22F3/12; B22F3/14; B22F3/15
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
52 words
The improved apparatus claimed in claim 1, wherein the outermost cuplike member is inwardly spaced from said shell, and wherein the spaces between the outermost cuplike member and said shell and the spaces defined by the spaced-apart cuplike members contain a portion of said fluid when the fluid is in said chamber.
Claim 2
Dependent Claim
64 words
The improved apparatus claimed in claim 2, wherein ring means are carried by the cylinder adjacent the end thereof opposite the end wall enclosing said one end of the cylinder and laterally inwardly projecting into said chamber for supporting said cuplike members, and wherein sealing means are disposed intermediate the bell assembly and the hearth for inhibiting the passage of fluid from said chamber.
Claim 3
Dependent Claim
82 words
The improved apparatus as claimed in claim 3, wherein said hearth has a peripherally extending skirt at a location thereon spaced from said heating means, a further ring means is carried by said cylinder at a location thereon separated from the cuplike members by the first-mentioned ring means, said further ring means projecting inwardly into said cavity from said shell and overlapping a portion of said skirt, and wherein the sealing means are disposed between the further ring means and the skirt.
Claim 4
Dependent Claim
63 words
The improved apparatus claimed in claim 4, wherein the sealing means comprise an annular flange carried by the further ring means on a portion thereof overlying said skirt and projecting towards the latter, and an annulus of resilient thermal insulating material carried by the skirt at a location between the latter and said flange for intercepting the flange and effecting a seal therewith.
Claim 5
Dependent Claim
73 words
The improved apparatus claimed in claim 5, wherein further sealing means are disposed between the first-mentioned ring means and said further ring means, said further sealing means comprising a further flange carried by the first-mentioned ring means and projecting towards said further ring means, and an other annulus of resilient thermal insulating material carried by said further ring means for intercepting the further flange and effecting a seal therewith between the ring means.
Claim 6
Dependent Claim
29 words
The improved apparatus claimed in claim 1, wherein said cuplike members are fabricated of at least one of the materials selected from the group consisting of graphite and refractories.
Claim 7
Dependent Claim
89 words
The improved apparatus claimed in claim 2, wherein sealing means are disposed intermediate the hearth and the bell assembly for inhibiting the flow of fluid from said chamber, said sealing means comprising an annular flange carried by the bell assembly at a location thereon adjacent to said hearth and projecting towards a peripherally disposed portion of the latter, and an annulus of resilient thermal insulating material carried by said hearth and disposed between the latter and said flange for effecting the seal when contacted and deformed by said flange.
References Cited (Backward Citations)
US3419935A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-22 | 1974-09-21 | 1975-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-22 | 1978-09-21 | 1979-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-22 | 1982-09-21 | 1983-03-23 | $7700.00 | Window Closed / Lapsed |