US3628779A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Furnace for heat-treating objects under high pressure
Assignee: ABB Norden Holding AB
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Filing: 1969-10-16
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Granted: 1971-12-21
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Expires: 1989-10-16
Abstract
Abstract A vertical furnace includes a press stand and a cylindrical pressure chamber suspended in the press stand. The pressure chamber includes a high-pressure cylinder and end members. The high-pressure cylinder includes a furnace chamber provided with insulation between the pressure cylinder and the walls of the pressure chamber. This insulation is a cylindrical sheath which depends from an end member fixed in one end of the high-pressure cylinder. The end closures include insulating bodies which extend into the furnace member.
Inventors
- 👤 Hans Lundstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:08
CPC Classifications
B; B30; B30B; B30B11/00; B30B11/001; B30B11/002; B22; B22F; B22F3/00; B22F3/12; B22F3/14; B22F3/15
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
132 words
Vertical furnace for simultaneously treating material at high temperatures and in a gas atmosphere of high pressure, comprising a press stand, a cylindrical pressure chamber suspended in said press stand and comprising a high pressure cylinder and end members for closing gastightly the pressure cylinder which are held in place by said press stand and take up the axial forces which a pressure medium in the pressure chamber exerts on the end members, a furnace chamber within the high pressure cylinder, means to supply high pressure fluid to the furnace chamber, insulation arranged between said furnace chamber and the walls of the pressure chamber, which insulation comprises a cylindrical sheath of insulating material and an insulating lid and bottom, in which the insulating cylindrical sheath is suspended from the upper end member.
Claim 2
Dependent Claim
132 words
Vertical furnace for simultaneously treating material at high temperatures and in a gas atmosphere of high pressure, comprising a press stand, a cylindrical pressure chamber suspended in said press stand and comprising a high pressure cylinder and end members for closing gastightly the pressure cylinder which are held in place by said press stand and take up the axial forces which a pressure medium in the pressure chamber exerts on the end members, a furnace chamber within the high pressure cylinder, means to supply high pressure fluid to the furnace chamber, insulation arranged between said furnace chamber and the walls of the pressure chamber, which insulation comprises a cylindrical sheath of insulating material and an insulating lid and bottom, in which the insulating cylindrical sheath is suspended from the upper end member.
Claim 3
Dependent Claim
46 words
Furnace according to claim 1, in which the upper end member comprises a fixedly attached ring-shaped part from which the insulating cylindrical sheath is suspended and the opening of which forms the charging opening and a removable lid having a part projecting into the charging opening.
Claim 4
Dependent Claim
31 words
Furnace according to claim 1, in which the cylindrical sheath is spaced inwardly from the inner wall of the pressure chamber and terminates short of the bottom of the pressure chamber.
References Cited (Backward Citations)
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US1884748A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-20 | 1975-06-21 | 1975-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-20 | 1979-06-21 | 1979-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-20 | 1983-06-21 | 1983-12-21 | $7700.00 | Window Closed / Lapsed |