US4226679A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Latch mechanism for coke oven doors
Assignee: CENTURY II Inc A CORP OF
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Filing: 1979-02-15
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Granted: 1980-10-07
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Expires: 1999-02-15
Abstract
Abstract A latch mechanism for coke-oven doors, which mechanism includes combination radial thrust bearings for the latch bars. These bearings afford adjustability in all directions for the latch bars to enable force to be applied uniformly to the sealing strips which extend around the perimeter of the door.
Inventors
- 👤 Calvin E. Kelly
- 👤 Thomas E. Nicely
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:31
CPC Classifications
C; C10; C10B; C10B25/00; C10B25/02; C10B25/06
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
196 words
In a coke oven which includes a door having a sealing strip extending around its perimeter, a jamb having a surface to be contacted by said strip, and at least one latch mechanism for holding said door in closed position against said jamb, said latch mechanism comprising: a screw spindle threadedly engaging said door and projecting outwardly therefrom; a latch bar pivoted to said spindle; and a pair of latch hooks projecting outwardly from said jamb to be engaged by said bar but subject to being not perfectly in line; the combination therewith of an improved mounting for said bar providing self-adjustability thereof in all directions relative to said spindle to correct for misalignment of said hooks; said mounting comprising a combination radial-thrust bearing having outer and inner races and rollers between said races; said bar having a bore in which said outer race is fixed; said inner race being fixed to said spindle; the axes of said rollers lying at angles of about 40° to 50° to the axis of said spindle; and means retaining said bar on said spindle but forming a gap above said inner race to allow self-adjusting movement of said bar.
Claim 2
Dependent Claim
196 words
In a coke oven which includes a door having a sealing strip extending around its perimeter, a jamb having a surface to be contacted by said strip, and at least one latch mechanism for holding said door in closed position against said jamb, said latch mechanism comprising: a screw spindle threadedly engaging said door and projecting outwardly therefrom; a latch bar pivoted to said spindle; and a pair of latch hooks projecting outwardly from said jamb to be engaged by said bar but subject to being not perfectly in line; the combination therewith of an improved mounting for said bar providing self-adjustability thereof in all directions relative to said spindle to correct for misalignment of said hooks; said mounting comprising a combination radial-thrust bearing having outer and inner races and rollers between said races; said bar having a bore in which said outer race is fixed; said inner race being fixed to said spindle; the axes of said rollers lying at angles of about 40° to 50° to the axis of said spindle; and means retaining said bar on said spindle but forming a gap above said inner race to allow self-adjusting movement of said bar.
Claim 3
Dependent Claim
28 words
A combination as defined in claim 1 including an integral flange on said spindle abutting said inner race, said gap lying between said flange and said retaining means.
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) | 1983-10-07 | 1984-04-07 | 1984-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-10-07 | 1988-04-07 | 1988-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-10-07 | 1992-04-07 | 1992-10-07 | $7700.00 | Window Closed / Lapsed |