Patent US4068894A successfully refreshed from Google Patents.
US4068894A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mining machine cowl assembly
Assignee: DALE GROUP PLC
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Filing: 1976-10-06
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Granted: 1978-01-17
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Expires: 1996-10-06
Abstract
Abstract A cowl assembly for use in association with the shearing drum of a mining machine has an arcuate cowl member and a cowl arm connected to the cowl member, the cowl arm having an annular mounting member at the end thereof remote from said cowl member to enable mounting of the cowl assembly in association with the shearing drum for angular movement about the axis of the drum, a plurality of peg members being arranged circumferentially on said mounting member and projecting therefrom for engagement with a sprocket wheel forming part of a power drive mechanism adapted to be supported on the mining machine. The mounting member is preferably formed in arcuate halves interconnected by bolts disposed substantially tangentially to the mounting member and at diametrically opposite locations.
Inventors
- 👤 Eric Dring
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:03
CPC Classifications
E; E21; E21C; E21C35/00; E21C35/04; E21C25/00; E21C25/06; E21C25/08
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
138 words
A cowl assembly for use in association with the shearing drum of a mining machine, the cowl assembly comprising an arcuate cowl member and a cowl arm connected to the cowl member, the cowl arm having an annular mounting member at the end thereof remote from said cowl member to enable mounting of the cowl assembly in association with the shearing drum for angular movement about the axis of the drum, a power drive mechanism adapted to be supported on the mining machine and including a sprocket wheel, and a plurality of peg members arranged circumferentially on said mounting member, said peg members being cantilevered from said mounting member and being spaced from each other and from all other components of the machine with the exception of said sprocket wheel which directly engages some of said peg members.
Claim 2
Dependent Claim
138 words
A cowl assembly for use in association with the shearing drum of a mining machine, the cowl assembly comprising an arcuate cowl member and a cowl arm connected to the cowl member, the cowl arm having an annular mounting member at the end thereof remote from said cowl member to enable mounting of the cowl assembly in association with the shearing drum for angular movement about the axis of the drum, a power drive mechanism adapted to be supported on the mining machine and including a sprocket wheel, and a plurality of peg members arranged circumferentially on said mounting member, said peg members being cantilevered from said mounting member and being spaced from each other and from all other components of the machine with the exception of said sprocket wheel which directly engages some of said peg members.
Claim 3
Dependent Claim
26 words
A cowl assembly as claimed in claim 1, wherein the axis of each of said peg members is parallel to the axis of the shearing drum.
Claim 4
Dependent Claim
44 words
A cowl assembly according to claim 1, in which said annular mounting member is rotatably supported in a channel formed in one part of a two part split ring assembly adapted for locking engagement with a peripheral recess forming part of the mining machine.
Claim 5
Dependent Claim
61 words
A cowl assembly according to claim 3, wherein the parts of the said split ring assembly are provided with oppositely directly co-operating chamfered faces for engagement with a keying ring comprising arcuate halves having chamfered faces complementary with the faces on the parts of said split ring and an inwardly directed peripheral key for engagement with said recesses in the machine.
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) | 1981-01-16 | 1981-07-18 | 1982-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-16 | 1985-07-18 | 1986-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-16 | 1989-07-18 | 1990-01-17 | $7700.00 | Window Closed / Lapsed |