US4279581A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hot isostatic press
Assignee: MTU Aero Engines AG
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Filing: 1980-07-18
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Granted: 1981-07-21
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Expires: 2000-07-18
Abstract
Abstract A hot isostatic press comprising a working vessel, formed of at least two pieces, having a working chamber within it. The working medium supplied to the working chamber, for transmitting pressure to work pieces within the chamber, may be a molten metal. Heating means within the vessel and cooling means at the exterior of the vessel cooperate to produce a continuous isothermal region completely surrounding the working chamber. The isothermal region is at the solidification temperature of the metal working medium, so that any potential leaks of molten metal working medium from the vessel are sealed by solidification of metal reaching the isothermal region. There is a heat-resistant liner within the vessel, the isothermal region being within the liner. A storage vessel for the working medium and a high pressure vessel, which may be a plunger pump, are connected to each other and to the working vessel through conduits furnished with valves.
Inventors
- 👤 Wolfgang Betz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:06
CPC Classifications
B; B30; B30B; B30B11/00; B30B11/001; B22; B22F; B22F3/00; B22F3/12; B22F3/14; B22F3/15; B28; B28B; B28B3/00; B28B3/006; F; F27; F27B; F27B5/00; F27B5/04
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
100 words
A hot isostatic press comprising: (a) a working vessel defining a working chamber within it, (b) means for supplying a molten metal working medium to the working chamber, (c) heating means within the vessel and cooling means at the exterior of the vessel, and (d) control means interconnecting the heating and cooling means and producing a continuous isothermal region completely surrounding the working chamber, the isothermal region being at the solidification temperature of the metal working medium, whereby any potential leaks of molten metal working medium from the vessel are sealed by solidification of molten metal reaching the isothermal region.
Claim 2
Dependent Claim
100 words
A hot isostatic press comprising: (a) a working vessel defining a working chamber within it, (b) means for supplying a molten metal working medium to the working chamber, (c) heating means within the vessel and cooling means at the exterior of the vessel, and (d) control means interconnecting the heating and cooling means and producing a continuous isothermal region completely surrounding the working chamber, the isothermal region being at the solidification temperature of the metal working medium, whereby any potential leaks of molten metal working medium from the vessel are sealed by solidification of molten metal reaching the isothermal region.
Claim 3
Dependent Claim
18 words
A hot isostatic press as defined in claim 1 wherein the working vessel comprises at least two pieces.
Claim 4
Dependent Claim
16 words
A hot isostatic press as defined in claim 1 including a heat-resistant liner within the vessel.
Claim 5
Dependent Claim
55 words
A hot isostatic press as defined in claim 1 including a storage vessel for the working medium, a high pressure vessel, conduits connecting the working vessel to the storage vessel and to the high pressure vessel, a conduit connecting the storage vessel to the high pressure vessel, and a valve in each of the conduits.
Claim 6
Dependent Claim
56 words
A hot isostatic press as defined in claim 1 wherein the working vessel comprises a tubular jacket and flat covers, tie rods for clamping the jacket and covers together, and a lining within the vessel comprising a metal-encapsulated, thick-walled and highly heat-resistant layer filled with one or more products selected from sand, mullite, ZrO, and MgO.
Claim 7
Dependent Claim
22 words
A hot isostatic press as defined in claim 5 including lines for activating the heating means passing through the covers and lining.
Claim 8
Dependent Claim
32 words
A hot isostatic press as defined in claim 5 including an air supply and exhaust pipe passing through one of the covers and the lining, the pipe communicating with the working chamber.
Claim 9
Dependent Claim
18 words
A hot isostatic press as defined in claim 4 wherein the high pressure vessel is a plunger pump.
Claim 10
Dependent Claim
28 words
A hot isostatic press as defined in claim 4 wherein the valves open when contacted by the molten working medium and close when contacted by solidified working medium.
Claim 11
Dependent Claim
19 words
A hot isostatic press as defined in claim 9 wherein the valves can also be opened and closed mechanically.
References Cited (Backward Citations)
US3118177A
Cited
US3241188A
Cited
US3613157A
Cited
US3797986A
Cited
US4151400A
Cited
US4217087A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-07-20 | 1985-01-19 | 1985-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-07-20 | 1989-01-19 | 1989-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-07-20 | 1993-01-19 | 1993-07-21 | $7700.00 | Window Closed / Lapsed |