US3647265A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cutting heads
Assignee: Greenside Machine Co Ltd
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Filing: 1970-07-31
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Granted: 1972-03-07
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Expires: 1990-07-31
Abstract
Abstract A rotary drum-type cutting head for use with, for example, mining and tunnelling machines, comprises a cylindrical drum to the periphery of which are secured a number of arcuate segments provided with pick boxes for the reception of picks.
Inventors
- 👤 Gerald R O Pentith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:51
CPC Classifications
E; E21; E21C; E21C25/00; E21C25/06; E21C25/10; E21D; E21D9/00; E21D9/10; E21D9/1006; E21D9/104
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
89 words
A tunnelling or mineral mining machine, comprising: an arm rotatable about an axis extending longitudinally of said arm, means on said arm for driving at least one cutting head, said at least one cutting head comprising a drum having a peripheral surface formed from a plurality of part cylindrical interconnected platelike segments bearing cutting picks, each said segment has upstanding axially extending flanges, each said flange is secured to the corresponding abutting flange of the next adjacent segment, and a front surface formed from a detachable pick-bearing front plate.
Claim 2
Dependent Claim
89 words
A tunnelling or mineral mining machine, comprising: an arm rotatable about an axis extending longitudinally of said arm, means on said arm for driving at least one cutting head, said at least one cutting head comprising a drum having a peripheral surface formed from a plurality of part cylindrical interconnected platelike segments bearing cutting picks, each said segment has upstanding axially extending flanges, each said flange is secured to the corresponding abutting flange of the next adjacent segment, and a front surface formed from a detachable pick-bearing front plate.
Claim 3
Dependent Claim
72 words
A rotary drum-type cutting head, comprising: a drum having an arcuate peripheral surface; a plurality of part cylindrical, platelike segments on which the pick boxes are mounted; said segments are interconnected and fixed in position on the outer surface of said drum so as to form a shell thereon; each segment has upstanding axially extending flanges, and each said flange is secured to the corresponding abutting flange of the next adjacent segment.
Claim 4
Dependent Claim
72 words
A rotary drum-type cutting head, comprising: a drum having an arcuate peripheral surface; a plurality of part cylindrical, platelike segments on which the pick boxes are mounted; said segments are interconnected and fixed in position on the outer surface of said drum so as to form a shell thereon; each segment has upstanding axially extending flanges, and each said flange is secured to the corresponding abutting flange of the next adjacent segment.
Claim 5
Dependent Claim
28 words
A cutting head as claimed in claim 2, wherein said drum has a cylindrical outer surface provided with projections and said segments have holes interengaging with said projections.
Claim 6
Dependent Claim
36 words
A cutting head as claimed in claim 3, wherein each said segment has a flange which extends radially inwards adjacent one circumferential edge and said drum has a flange secured to the flanges of said segments.
Claim 7
Dependent Claim
31 words
A cutting head as claimed in claim 4, wherein a substantially circular pick-box bearing front plate is secured to the radially inwardly directed flanges of said segments and said drum respectively.
Claim 8
Dependent Claim
33 words
A cutting head as claimed in claim 5, wherein said radially inwardly directed flanges of said segments are set back from the edges thereof to provide a recess to receive said front plate.
Claim 9
Dependent Claim
25 words
A cutting head as claimed in claim 6, wherein said front plate is provided with keys engageable in gaps between adjacent flanges of said segments.
References Cited (Backward Citations)
US2801838A
Cited
US3558194A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-03-07 | 1975-09-06 | 1976-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-07 | 1979-09-06 | 1980-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-07 | 1983-09-06 | 1984-03-07 | $7700.00 | Window Closed / Lapsed |