US3902274A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coke oven leveling door hatch construction
Assignee: Individual
•
Filing: 1974-03-13
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Granted: 1975-09-02
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Expires: 1994-03-13
Abstract
Abstract A coke oven leveling door hatch construction, comprises a hatch pivot bearing adapted to be mounted on the coke oven door or directly adjacent the door. A hatch door for closing a leveling port includes a locking bar extending across the front face thereof which terminates in a forked end having a pair of bearings which engage over the respective ends of the hatch pivot bearing and which are secured to a pivot which extends through the pivot bearing so that the door may be pivoted thereabout. The pivot includes an offset portion or crank arm which is connectable to an opening mechanism which comprises a fluid pressure operated cylinder having a movable piston therein which is connected to a rotatable forked arm which engages the crank to rotate it through an arc to effect turning of the door to open the door. The locking bar includes an inwardly extending portion on the side of the door opposite from the pivot, which terminates in a hook which is engageable by a rotatable arm having a detent which engages with the hook. The arm is biased by a spring to rotate in a direction to cause engagement but the locking bar may be moved against the biasing force to rotate the latching arm having the detent so that the detent moves out of engagement with the hook.
Inventors
- 👤 Takatoshi Ikio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:28
CPC Classifications
C; C10; C10B; C10B25/00; C10B25/02; C10B25/06
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
329 words
A coke oven leveling door hatch construction, comprising a hatch pivot bearing having a vertically extending bore adapted to be mounted on the coke oven door, a hatch door having an outer face, a locking bar extending across the outer face of said hatch door and having a locking portion extending around an edge of said hatch door and terminating in an inwardly extending latch hook and having an opposite end forming a pivot bearing and overlying said pivot bearing bore and with an axle portion secured thereto rotatable in said pivot bearing, said axle portion having an offset crank arm portion, a latching mechanism adjacent said latching hook on said door including a rotatable arm having a detent projecting outwardly therefrom engagable with said latching hook, means to bias said arm to rotate it in a direction to engage said detent with said latching hook, said arm being movable by outward movement of said bar to rotate said arm against said biasing means to unlatch said bar from said detent, and door moving means connectable to said crank portion to rotate said crank portion with said axle portion, said locking bar and said hatch door to open said hatch door and to close said hatch door, said door moving means comprising a pivotal arm having an end engageable with said axle member a forked arm pivoted on said pivotal arm having a forked end engagable with said crank, said forked arm having a crank arm portion and a fluid pressure operated piston and cylinder connected to said crank arm portion to pivot said crank arm portion with said forked arm to rotate said crank, and a spring retainer connected to said arm at a location spaced from the pivotal mounting of said arm, said biasing means comprising a coil spring engageable with said spring retainer to urge said spring retainer to rotate said arm to close said detent of said arm to move into engagement with said hook.
Claim 2
Dependent Claim
329 words
A coke oven leveling door hatch construction, comprising a hatch pivot bearing having a vertically extending bore adapted to be mounted on the coke oven door, a hatch door having an outer face, a locking bar extending across the outer face of said hatch door and having a locking portion extending around an edge of said hatch door and terminating in an inwardly extending latch hook and having an opposite end forming a pivot bearing and overlying said pivot bearing bore and with an axle portion secured thereto rotatable in said pivot bearing, said axle portion having an offset crank arm portion, a latching mechanism adjacent said latching hook on said door including a rotatable arm having a detent projecting outwardly therefrom engagable with said latching hook, means to bias said arm to rotate it in a direction to engage said detent with said latching hook, said arm being movable by outward movement of said bar to rotate said arm against said biasing means to unlatch said bar from said detent, and door moving means connectable to said crank portion to rotate said crank portion with said axle portion, said locking bar and said hatch door to open said hatch door and to close said hatch door, said door moving means comprising a pivotal arm having an end engageable with said axle member a forked arm pivoted on said pivotal arm having a forked end engagable with said crank, said forked arm having a crank arm portion and a fluid pressure operated piston and cylinder connected to said crank arm portion to pivot said crank arm portion with said forked arm to rotate said crank, and a spring retainer connected to said arm at a location spaced from the pivotal mounting of said arm, said biasing means comprising a coil spring engageable with said spring retainer to urge said spring retainer to rotate said arm to close said detent of said arm to move into engagement with said hook.
Claim 3
Dependent Claim
257 words
A coke oven leveling door hatch construction, comprising a hatch pivot bearing having a vertically extending bore adapted to be mounted on the coke oven, a hatch door having an outer face, a locking bar extending across the outer face of said hatch door and having a locking portion extending around an edge of said hatch door and terminating in an upwardly extending latch hook and having an opposite end forming a pivot bearing and overlying said pivot bearing bore and with an axle portion secured thereto rotatable in said pivot bearing, said axle portion having an offset crank arm portion, a latching mechanism adjacent said latching hook on said door including a rotatable arm extending obliquely outwardly and upwardly from the oven and having a lower end with a detent projecting downwardly therefrom engageable with said latching hook and an outer end which is engageable to be moved inwardly to open said latching mechanism, means to bias said arm to rotate it in a direction outwardly from the oven so as to form an inwardly and downwardly extending side surFace down to said detent to permit easy engagement of said latching hook with said detent, said arm being movable by outward movement of said bar to rotate said arm against said biasing means to unlatch said bar from said detent, and door moving means connectable to said crank portion to rotate said crank portion with said axle portion, said locking bar and said hatch door to open said hatch door and to close said hatch door.
Claim 4
Dependent Claim
257 words
A coke oven leveling door hatch construction, comprising a hatch pivot bearing having a vertically extending bore adapted to be mounted on the coke oven, a hatch door having an outer face, a locking bar extending across the outer face of said hatch door and having a locking portion extending around an edge of said hatch door and terminating in an upwardly extending latch hook and having an opposite end forming a pivot bearing and overlying said pivot bearing bore and with an axle portion secured thereto rotatable in said pivot bearing, said axle portion having an offset crank arm portion, a latching mechanism adjacent said latching hook on said door including a rotatable arm extending obliquely outwardly and upwardly from the oven and having a lower end with a detent projecting downwardly therefrom engageable with said latching hook and an outer end which is engageable to be moved inwardly to open said latching mechanism, means to bias said arm to rotate it in a direction outwardly from the oven so as to form an inwardly and downwardly extending side surFace down to said detent to permit easy engagement of said latching hook with said detent, said arm being movable by outward movement of said bar to rotate said arm against said biasing means to unlatch said bar from said detent, and door moving means connectable to said crank portion to rotate said crank portion with said axle portion, said locking bar and said hatch door to open said hatch door and to close said hatch door.
Claim 5
Dependent Claim
81 words
A coke oven leveling door hatch construction, as claimed in claim 2 wherein said door moving means comprises a pivotal arm having an end engageable with said axle member, a forked arm pivoted on said pivotal arm having a forked end engageable with said crank, said forked arm having a crank arm portion and a fluid pressure operated piston and cylinder connected to said crank arm portion to pivot said crank arm portion with said forked arm to rotate said crank.
Claim 6
Dependent Claim
76 words
A coke oven leveling door hatch construction, as claimed in claim 2, wherein said arm outer end having a release engagement roller thereon, a spring retainer connected to said arm at a location spaced from the pivotal mounting of said arm, said biasing means comprising a coil spring engageable with said spring retainer to urge said spring retainer to rotate said arm to close said detent of said arm to move into engagement with said hook.
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) | 1978-09-01 | 1979-03-03 | 1979-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-01 | 1983-03-03 | 1983-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-01 | 1987-03-03 | 1987-09-02 | $7700.00 | Window Closed / Lapsed |