US3260512A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metallurgical furnace
Assignee: Rekuperator Kg Dr-Ing Schack & Co
•
Filing: 1964-12-16
•
Granted: 1966-07-12
•
Expires: 1984-12-16
Abstract
No abstract record available.
Inventors
- 👤 Claessens Werner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:30
CPC Classifications
C; C21; C21D; C21D9/00; C21D9/70
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
182 words
IN A METALLURGICAL FURNACE OF THE TYPE WHEREIN THE TEMPERATURE OF FURNACE GASES VARIES WITHIN A WIDE RANGE, AN OVEN DEFINING A HEATING CHAMBER; BURNER MEANS FOR PRODUCING IN SAID OVEN FURNACE GASES TO HEAT THE CONTENTS OF SAID CHAMBER; FIRST CONDUIT MEANS FOR ADMITTING AIR TO SAID BURNER MEANS; A RECUPERATOR PROVIDED IN SAID FIRST CONDUIT MEANS; SECOND CONDUIT MEANS OPERATIVELY CONNECTING SAID CHAMBER WITH SAID RECUPERATOR SO THAT FURNACE GASES PASSING THROUGH SAID SECOND CONDUIT MEANS HEAT THE AIR IN SAID FIRST CONDUIT MEANS; BLOWER MEANS PROVIDED IN SAID FIRST CONDUIT MEANS UPSTREAM OF SAID RECUPERATOR TO DIRECT A STREAM OF AIR THROUGH SAID RECUPERATOR AND ONTO SAID BURNER MEANS; AND ADJUSTABLE REGULATING VALVE PROVIDED IN SAID FIRST CONDUIT MEANS UPSTREAM OF SAID BLOWER MEANS; AND A BYPASS CONDUIT HAVING A FIRST END PORTION COMMUNICATING WITH SAID FIRST CONDUIT MEANS INTERMEDIATE SAID BURNER MEANS AND SAID RECUPERATOR AND A SECOND END PORTION COMMUNICATING WITH SAID FIRST CONDUIT MEANS INTERMEDIATE SAID BLOWER MEANS AND SAID VALVE MEANS TO RETURN SOME PREHEATED AIR INTO SAID FIRST CONDUIT MEANS UPSTREAM OF SAID RECUPERATOR.
Claim 2
Dependent Claim
182 words
IN A METALLURGICAL FURNACE OF THE TYPE WHEREIN THE TEMPERATURE OF FURNACE GASES VARIES WITHIN A WIDE RANGE, AN OVEN DEFINING A HEATING CHAMBER; BURNER MEANS FOR PRODUCING IN SAID OVEN FURNACE GASES TO HEAT THE CONTENTS OF SAID CHAMBER; FIRST CONDUIT MEANS FOR ADMITTING AIR TO SAID BURNER MEANS; A RECUPERATOR PROVIDED IN SAID FIRST CONDUIT MEANS; SECOND CONDUIT MEANS OPERATIVELY CONNECTING SAID CHAMBER WITH SAID RECUPERATOR SO THAT FURNACE GASES PASSING THROUGH SAID SECOND CONDUIT MEANS HEAT THE AIR IN SAID FIRST CONDUIT MEANS; BLOWER MEANS PROVIDED IN SAID FIRST CONDUIT MEANS UPSTREAM OF SAID RECUPERATOR TO DIRECT A STREAM OF AIR THROUGH SAID RECUPERATOR AND ONTO SAID BURNER MEANS; AND ADJUSTABLE REGULATING VALVE PROVIDED IN SAID FIRST CONDUIT MEANS UPSTREAM OF SAID BLOWER MEANS; AND A BYPASS CONDUIT HAVING A FIRST END PORTION COMMUNICATING WITH SAID FIRST CONDUIT MEANS INTERMEDIATE SAID BURNER MEANS AND SAID RECUPERATOR AND A SECOND END PORTION COMMUNICATING WITH SAID FIRST CONDUIT MEANS INTERMEDIATE SAID BLOWER MEANS AND SAID VALVE MEANS TO RETURN SOME PREHEATED AIR INTO SAID FIRST CONDUIT MEANS UPSTREAM OF SAID RECUPERATOR.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-07-11 | 1970-01-10 | 1970-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-11 | 1974-01-10 | 1974-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-11 | 1978-01-10 | 1978-07-12 | $7700.00 | Window Closed / Lapsed |