Patent US3937151A successfully refreshed from Google Patents.
US3937151A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mineral mining equipment
Assignee: Coal Industry Patents Ltd
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Filing: 1974-09-17
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Granted: 1976-02-10
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Expires: 1994-09-17
Abstract
Abstract A track member for a mineral mining machine which hauls itself along a working face by engaging a flexible round link chain has pockets for fixedly engaging those links of the chain lying in a first plane and a continuous groove interconnecting the pockets for accommodating those links of the chain lying in a plane perpendicular to the first plane.
Inventors
- 👤 Harry Monks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:13
CPC Classifications
E; E21; E21C; E21C29/00; E21C29/04; E21C29/06; E21C29/10; E21C35/00; E21C35/08; E21C35/12
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
109 words
A track member adapted to form part of a track assembly for a mineral mining machine which in use traverses to and fro along a path adjacent to an armoured face conveyor arranged along a mineral face and which has a driven sprocket assembly including a flexible round link chain having adjacent links arranged in two perpendicular planes, comprising an elongated component defining a number of pockets for fixedly engaging those links of the chain lying in one perpendicular plane, the elongated component further defining a continuous groove interconnecting the pockets for accommodating those links of the chain lying in the other plane perpendicular to the said one plane.
Claim 2
Dependent Claim
109 words
A track member adapted to form part of a track assembly for a mineral mining machine which in use traverses to and fro along a path adjacent to an armoured face conveyor arranged along a mineral face and which has a driven sprocket assembly including a flexible round link chain having adjacent links arranged in two perpendicular planes, comprising an elongated component defining a number of pockets for fixedly engaging those links of the chain lying in one perpendicular plane, the elongated component further defining a continuous groove interconnecting the pockets for accommodating those links of the chain lying in the other plane perpendicular to the said one plane.
Claim 3
Dependent Claim
23 words
A track member as claimed in claim 1, in which the pockets are formed in one face of a slideway for the machine.
Claim 4
Dependent Claim
30 words
The track member as claimed in claim 1 in which the groove extends below the pockets and through areas of the pockets for receiving a scraper moving through the groove.
Claim 5
Dependent Claim
31 words
The track member as claimed in claim 1 further comprising a plurality of holes extending downward through the track from the groove, whereby particles are removed by gravity from the groove.
Claim 6
Dependent Claim
24 words
The track member as claimed in claim 4 wherein the holes extend downward from the groove in areas of the groove between the pockets.
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) | 1979-02-09 | 1979-08-11 | 1980-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-09 | 1983-08-11 | 1984-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-09 | 1987-08-11 | 1988-02-10 | $7700.00 | Window Closed / Lapsed |