Patent US4032409A successfully refreshed from Google Patents.
US4032409A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealing device for a coke oven door
Assignee: Carl Still GmbH and Co KG
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Filing: 1975-06-11
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Granted: 1977-06-28
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Expires: 1995-06-11
Abstract
Abstract A sealing device for a coke oven door comprises first and second spaced apart metal sealing blades having respective substantially aligned sealing edges adapted to extend outwardly from the edge of the coke oven door. A metal spacer is mounted between the first and second sealing blades at a location spaced inwardly from the sealing edges and an elastic sealing strip is located between the two blades and has an outer elastic sealing edge which is substantially in alignment with or projects outwardly slightly beyond the blade sealing edges, and bears against the door frame.
Inventors
- 👤 Johannes Knappstein
- 👤 Heinrich Tewes
- 👤 Robert Woikowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:05
CPC Classifications
C; C10; C10B; C10B25/00; C10B25/02; C10B25/16
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
133 words
A sealing device for sealing a coke oven door to a door frame, comprising first and second spaced apart metal sealing blades having respective substantially aligned sealing edges adapted to extend outwardly from the edge of the door and abut against the frame in sealing engagement, a metal spacer between said first and second sealing blades having an outer edge spaced inwardly from the sealing edges of said first and second sealing blades, clamping means for mounting said first and second sealing blades and said spacer on a coke oven door, and an elastic sealing strip of a mineral fiber between said first and second sealing blades and having an outer elastic sealing edge substantially in alignment with said blade sealing edges and also abutting tightly against said frame in sealing engagement therewith.
Claim 2
Dependent Claim
133 words
A sealing device for sealing a coke oven door to a door frame, comprising first and second spaced apart metal sealing blades having respective substantially aligned sealing edges adapted to extend outwardly from the edge of the door and abut against the frame in sealing engagement, a metal spacer between said first and second sealing blades having an outer edge spaced inwardly from the sealing edges of said first and second sealing blades, clamping means for mounting said first and second sealing blades and said spacer on a coke oven door, and an elastic sealing strip of a mineral fiber between said first and second sealing blades and having an outer elastic sealing edge substantially in alignment with said blade sealing edges and also abutting tightly against said frame in sealing engagement therewith.
Claim 3
Dependent Claim
32 words
A sealing device according to claim 1, wherein said spacer comprises a contour strip having a recess for accommodating said clamping means, said clamping means comprising a bolt extending through said recess.
Claim 4
Dependent Claim
21 words
A sealing device according to claim 1, wherein said spacer comprises a strip divided longitudinally into a plurality of strip portions.
Claim 5
Dependent Claim
41 words
A sealing device according to claim 1, wherein each of said sealing blades has a bevelled side adjacent the sealing edge with at least one being oriented toward said elastic sealing strip so that said strip is enlarged adjacent said bevel.
Claim 6
Dependent Claim
26 words
A sealing device according to claim 4, wherein both of said sealing blades have bevelled sides adjacent said sealing edges which face toward said elastic strip.
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) | 1980-06-27 | 1980-12-27 | 1981-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-27 | 1984-12-27 | 1985-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-27 | 1988-12-27 | 1989-06-28 | $7700.00 | Window Closed / Lapsed |