Patent US4047901A successfully refreshed from Google Patents.
US4047901A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Feeder for coal-gasification reactor
Assignee: GEA Group AG
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Filing: 1976-08-13
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Granted: 1977-09-13
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Expires: 1996-08-13
Abstract
Abstract A device for feeding granular and dust coal to a coal-gasifying reactor which operates under a pressure of 5 to 150 bars. A stationary housing is connected to the coal inlet of the reactor and a lock chamber member is rotatedly mounted therein. The lock chamber member is movable between coal-receiving position and a coal-discharging position. The lock chamber member has at least one chamber which is open only at one end and contains a displacing device which extends approximately to the entrance of the chamber. The displacing device substantially prevents an ingress of product gas into the chamber when in the discharge position.
Inventors
- 👤 Gerhard Baron
- 👤 Herbert Bierbach
- 👤 Carl Hafke
- 👤 Karlheinz Zolzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:27
CPC Classifications
C; C10; C10J; C10J3/00; C10J3/46; C10J3/48; C10J3/50; C10J3/02; C10J3/20; C10J3/30; C10J3/72; C10J3/78; C10J2200/00; C10J2200/09; C10J2300/00; C10J2300/09; C10J2300/0913; C10J2300/093; C10J2300/0953; C10J2300/0959; C10J2300/0969; C10J2300/0973; C10J2300/0976
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
119 words
Device for feeding granular and dust coal to a coal-gasifying reactor operating under a pressure of 5 to 150 bars comprising stationary housing means connected to the coal inlet of the reactor in which a lock member is rotatably mounted and movable between a coal-receiving position and coal-discharging position, said lock member having at least one chamber which is open only at one end and containing displacing means which extends approximately to the entrance of the chamber, said displacing means consisting of a plurality of telescopic tubes which form a stem that extends and retracts and carries a sealing head within the chamber, thereby substantially preventing an ingress of product gas into the chamber when in the discharge position.
Claim 2
Dependent Claim
119 words
Device for feeding granular and dust coal to a coal-gasifying reactor operating under a pressure of 5 to 150 bars comprising stationary housing means connected to the coal inlet of the reactor in which a lock member is rotatably mounted and movable between a coal-receiving position and coal-discharging position, said lock member having at least one chamber which is open only at one end and containing displacing means which extends approximately to the entrance of the chamber, said displacing means consisting of a plurality of telescopic tubes which form a stem that extends and retracts and carries a sealing head within the chamber, thereby substantially preventing an ingress of product gas into the chamber when in the discharge position.
Claim 3
Dependent Claim
11 words
Device of claim 1 wherein the displacing means is hydraulically movable.
Claim 4
Dependent Claim
19 words
Device of claim 2 wherein the hydraulic fluid acting directly on the displacing device is mainly an incombustible liquid.
Claim 5
Dependent Claim
18 words
Device of claim 1 wherein the lock member has two chambers spaced 180° apart and associated displacing 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) | 1980-09-12 | 1981-03-14 | 1981-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-12 | 1985-03-14 | 1985-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-12 | 1989-03-14 | 1989-09-13 | $7700.00 | Window Closed / Lapsed |