US4368925A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cutter drum assembly for a longwall mining machine
Assignee: Gebr Eickhoff Maschinenfabrik u Eisengiesserei GmbH
•
Filing: 1981-03-04
•
Granted: 1983-01-18
•
Expires: 2001-03-04
Abstract
Abstract A cutter drum assembly for a longwall mining machine of the type having a cowl pivotal about the axis of the drum and nozzles on the periphery of its spiral conveying flights for directing a trickle of liquid onto the face area being mined. The cowl, which is normally on the side of the drum opposite the face being mined, carries a cam which controls valves supplying liquid to the nozzles such that at any time water is delivered only from those nozzles adjacent the working face area.
Inventors
- 👤 Heinrich Honke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 01:15
CPC Classifications
E; E21; E21C; E21C25/00; E21C25/06; E21C25/10; E21C35/00; E21C35/22; E21C35/23
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
86 words
In a shearer drum assembly for a mining machine having nozzles on its periphery for delivering liquid under pressure to a face area being mined, the combination of a cowl pivotal around the axis of the drum assembly, valves spaced around the periphery of the drum assembly for controlling the flow of liquid to said nozzles, and cam means pivotal with said cowl and arranged to actuate said valves such that at any time liquid is delivered only from those nozzles essentially diametrically opposite the cowl.
Claim 2
Dependent Claim
86 words
In a shearer drum assembly for a mining machine having nozzles on its periphery for delivering liquid under pressure to a face area being mined, the combination of a cowl pivotal around the axis of the drum assembly, valves spaced around the periphery of the drum assembly for controlling the flow of liquid to said nozzles, and cam means pivotal with said cowl and arranged to actuate said valves such that at any time liquid is delivered only from those nozzles essentially diametrically opposite the cowl.
Claim 3
Dependent Claim
33 words
The shearer drum assembly of claim 1 wherein each of said valves controls the flow of liquid only to those nozzles disposed in an arcuate portion of the periphery of the shearer drum.
Claim 4
Dependent Claim
32 words
The shearer drum assembly of claim 1 wherein said cowl is mounted on an arm rotatable around the axis of the shearer drum assembly, said cam means being carried by said arm.
Claim 5
Dependent Claim
39 words
The shearer drum assembly of claim 1 including conduit means extending through said shearer drum assembly for connecting a source of fluid under pressure to said valves, and conduit means connecting said valves to selected ones of said nozzles.
References Cited (Backward Citations)
US3897110A
Cited
US4212497A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-01-17 | 1986-07-19 | 1987-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-17 | 1990-07-19 | 1991-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-17 | 1994-07-19 | 1995-01-18 | $7700.00 | Window Closed / Lapsed |