Patent US4332552A successfully refreshed from Google Patents.
US4332552A
Expired / Lapsed
US
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Moldatherm insulated pacemaker furnace and method of manufacture
Assignee: GENEAL SIGNAL TECHNOLOGY Corp (DE CORP)
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Filing: 1980-10-03
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Granted: 1982-06-01
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Expires: 2000-10-03
Abstract
Abstract An insulated furnace, method of manufacture and purging operation which includes a plurality of interconnected modular panels of fibrous material forming a furnace chamber, a heat source for the furnace chamber and a furnace shell surrounding the fibrous material panels so as to form a space between the shell and the fibrous material panels and to provide a thermal break of greater than 10° F. such that the furnace can be rapidly heated and water vapor and air can be rapidly purged from the furnace. An insulation panel is formed of at least one block of fibrous material in a molded form which includes mixed fibers and a frame member to which the at least one block of material is secured.
Inventors
- 👤 Karl H. Seelandt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:05
CPC Classifications
F; F27; F27D; F27D11/00; F27D11/02; F27B; F27B5/00; F27B5/04; F27B5/06; F27B5/14; F27B5/16; F27D1/00; F27D1/0003; F27D1/0006; F27D1/0009; F27D1/0033; F27D1/04; F27D1/06; F27B2005/143; F27B2005/166; F27B2005/167; F27D1/18; F27D1/1858; F27D2001/0046; F27D2001/0053; F27D2001/0059; F27D2001/0069; F27D2001/0073; F27D99/00; F27D99/0001; F27D99/0006; F27D2099/0008; F27D2099/0011; F27D3/00; F27D3/02; F27D3/026; F27D3/028
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
235 words
An insulated furnace assembly comprising: a plurality of interconnected modular panels of fibrous material comprising alumina and slica fibers having interconnecting highly gas permeable air pockets formed therein, said panels exclusively forming a furnance chamber; means for heating said furnace chamber to a temperature from 500° F. to 2000° F.; means for rapidly purging said furnace of residual air and water vapor wherein said purging means further comprises a furnace shell surrounding said fibrous material panels so as to form a space between said shell and said fibrous material panels; means for circulating a first gas within said furnace chamber; means for circulating a second gas within said space formed between said shell and said fibrous material panels such that said furnace chamber and said space are rapidly purged of said air and water vapor; means for forcing said air and water vapor through said fibrous material panels into said furnace chamber, wherein said forcing means further comprises means for pressurizing said first gas to a first pressure above atmospheric pressure and means for pressurizing said second gas to a second pressure equal to or greater than said first pressure such that any portion of said air and water vapor which has migrated from said furnace chamber toward said space is forced back toward said furnace chamber; frame means upon which said fibrous material panels are mounted; and means for interconnecting said fibrous material panels.
Claim 2
Dependent Claim
235 words
An insulated furnace assembly comprising: a plurality of interconnected modular panels of fibrous material comprising alumina and slica fibers having interconnecting highly gas permeable air pockets formed therein, said panels exclusively forming a furnance chamber; means for heating said furnace chamber to a temperature from 500° F. to 2000° F.; means for rapidly purging said furnace of residual air and water vapor wherein said purging means further comprises a furnace shell surrounding said fibrous material panels so as to form a space between said shell and said fibrous material panels; means for circulating a first gas within said furnace chamber; means for circulating a second gas within said space formed between said shell and said fibrous material panels such that said furnace chamber and said space are rapidly purged of said air and water vapor; means for forcing said air and water vapor through said fibrous material panels into said furnace chamber, wherein said forcing means further comprises means for pressurizing said first gas to a first pressure above atmospheric pressure and means for pressurizing said second gas to a second pressure equal to or greater than said first pressure such that any portion of said air and water vapor which has migrated from said furnace chamber toward said space is forced back toward said furnace chamber; frame means upon which said fibrous material panels are mounted; and means for interconnecting said fibrous material panels.
Claim 3
Dependent Claim
38 words
An insulated furnace assembly as set forth in claim 1; said frame means comprising a rectangularly shaped outer frame, a center bar member and a plurality of cross bar members interconnecting said center bar with said outer frame.
Claim 4
Dependent Claim
23 words
An insulated furnace assembly as set forth in claim 1, said furnace comprising a protective atmosphere type furnace having an enriched endothermic atmosphere.
Claim 5
Dependent Claim
35 words
An insulated furnace assembly as set forth in claim 1, said means for heating said furnace comprising at least one U-shaped tube supported by said fibrous material panels and including a plurality of sealed burners.
Claim 6
Dependent Claim
33 words
An insulated furnace assembly as set forth in claim 1, said means for circulating said first gas comprising a fan member mounted to said fibrous material panels and positioned within said furnace chamber.
Claim 7
Dependent Claim
36 words
An insulated furnace assembly as set forth in claim 1, said means for heating said furnace comprising at least one U-shaped tube supported by said fibrous material panels and including a plurality of electric heating elements.
Claim 8
Dependent Claim
28 words
An insulated furnace assembly as set forth in claim 1 further comprising a blanket of material disposed within said space between said shell and said fibrous material panels.
Claim 9
Dependent Claim
28 words
An insulated furnace assembly as set forth in claim 1, wherein adjacent panels of said interconnecting panels include interfacing edge portions which cooperate to interconnect said adjacent panels.
Claim 10
Dependent Claim
27 words
An insulated furnace assembly as set forth in claim 8, further comprising: means for optically-tightly sealing said interfacing edge portions which cooperate to interconnect said adjacent panels.
Claim 11
Dependent Claim
31 words
An insulated furnace assembly as set forth in claim 1, said frame means further comprising: retainer means for interconnecting said first and second layer of fibrous material blocks to said frame.
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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) | 1985-05-31 | 1985-11-30 | 1986-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-31 | 1989-11-30 | 1990-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-31 | 1993-11-30 | 1994-06-01 | $7700.00 | Window Closed / Lapsed |