US3342469A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealing device for high vacuum furnace
Assignee: C I HAYES Inc
•
Filing: 1965-02-08
•
Granted: 1967-09-19
•
Expires: 1985-02-08
Abstract
No abstract record available.
Inventors
- 👤 Herbert W Westeren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:05
CPC Classifications
C; C21; C21D; C21D1/00; C21D1/74; C21D1/773
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
187 words
IN A FURNACE FOR USE IN HEAT TREATING METALLIC ARTICLES, A HEATING CHAMBER IN WHICH SAID ARTICLES ARE HEAT TREATED AT RELATIVELY HIGH TEMPERATURES, A COMPARTMENT COMMUNICATING WITH SAID HEATING CHAMBER AND RECEIVING SAID ARTICLES PRIOR TO INTRODUCTION INTO SAID HEATING CHAMBER AND AFTER THE HEAT TREATING OPERATING, A METAL SEALING MEMBER LOCATED BETWEEN SAID HEATING CHAMBER AND COMPARTMENT AND HAVING A BORE FORMED THEREIN THE PROVIDES COMMUNICATION BETWEEN SAID HEATING CHAMBER AND COMPARTMENT WHEN SAID ARTICLES ARE MOVED TO AND FROM SAID HEATING CHAMBER, SAID METAL SEALING MEMBER BEING SUBJECTED TO THE HIGH TEMPERATURES GENERATED IN SAID HEATING CHAMBER, MEANS FOR CONTROLLING THE PRESSURE IN SAID HEATING CHAMBER AND COMPARTMENT DURING THE HEATING CYCLE OF SAID ARTICLES WHEREIN THE PRESSURE IN SAID HEATING CHAMBER IS THE SAME AS THE MAINTAINED IN SAID COMPARTMENT, A METAL SEALING PLATE THAT IS MOVABLE INTO ENGAGING RELATION WITH SAID SEALING MEMBER WHEN SAID BORE IS TO BE SEALED FOR MAINTAINING THE TEMPERATURE AND PRESSURE IN SAID HEATING CHAMBER, THE FACE OF SAID SEALING MEMBER WITH WHICH SAID SEALING PLATE ENGAGES HAVING A CAVITY FORMED THEREIN, A VACUUM SOURCE COMMUNICATING WITH
Claim 2
Dependent Claim
187 words
IN A FURNACE FOR USE IN HEAT TREATING METALLIC ARTICLES, A HEATING CHAMBER IN WHICH SAID ARTICLES ARE HEAT TREATED AT RELATIVELY HIGH TEMPERATURES, A COMPARTMENT COMMUNICATING WITH SAID HEATING CHAMBER AND RECEIVING SAID ARTICLES PRIOR TO INTRODUCTION INTO SAID HEATING CHAMBER AND AFTER THE HEAT TREATING OPERATING, A METAL SEALING MEMBER LOCATED BETWEEN SAID HEATING CHAMBER AND COMPARTMENT AND HAVING A BORE FORMED THEREIN THE PROVIDES COMMUNICATION BETWEEN SAID HEATING CHAMBER AND COMPARTMENT WHEN SAID ARTICLES ARE MOVED TO AND FROM SAID HEATING CHAMBER, SAID METAL SEALING MEMBER BEING SUBJECTED TO THE HIGH TEMPERATURES GENERATED IN SAID HEATING CHAMBER, MEANS FOR CONTROLLING THE PRESSURE IN SAID HEATING CHAMBER AND COMPARTMENT DURING THE HEATING CYCLE OF SAID ARTICLES WHEREIN THE PRESSURE IN SAID HEATING CHAMBER IS THE SAME AS THE MAINTAINED IN SAID COMPARTMENT, A METAL SEALING PLATE THAT IS MOVABLE INTO ENGAGING RELATION WITH SAID SEALING MEMBER WHEN SAID BORE IS TO BE SEALED FOR MAINTAINING THE TEMPERATURE AND PRESSURE IN SAID HEATING CHAMBER, THE FACE OF SAID SEALING MEMBER WITH WHICH SAID SEALING PLATE ENGAGES HAVING A CAVITY FORMED THEREIN, A VACUUM SOURCE COMMUNICATING WITH
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) | 1970-09-18 | 1971-03-20 | 1971-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-18 | 1975-03-20 | 1975-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-18 | 1979-03-20 | 1979-09-19 | $7700.00 | Window Closed / Lapsed |