US3216201A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mine roof supports
Assignee: Coal Industry Patents Ltd
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Filing: 1960-10-07
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Granted: 1965-11-09
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Expires: 1980-10-07
Abstract
No abstract record available.
Inventors
- 👤 Kibble John Dunbar
- 👤 Williams Morgan James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:05
CPC Classifications
E; E21; E21D; E21D23/00; E21D23/006; E21D23/0073; E21D23/16; F; F15; F15B; F15B11/00; F15B11/16; F15B11/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
331 words
A MINE ROOF SUPPORT SYSTEM COMPRISING A PLURALITY OF EXTENSIBLE FLUID OPERATED MINE ROOF SUPPORT UNITS EACH HAVING AT LEAST ONE SUPPORT, THE UNITS BEING ARRANGED AT SPACED INTERVALS ALONG A MINERAL FACE FOR OPERATION IN A PREDETERMINED SEQUENCE; ANCHORAGE MEANS COMMON TO ALL THE SUPPORT UNITS; AT LEAST ONE FLUID OPERATED JACK ASSOCIATED WITH AND CONNECTED BETWEEN EACH SUPPORT UNIT AND THE ANCHORAGE MEANS FOR ADVANCING THE ASSOCIATED SUPPORT UNIT RELATIVE TO THE MINERAL FACE; A FLUID PRESSURE SUPPLY LINE FOR SUPPLYING OPERATING FLUID TO THE SUPPORT UNITS AND JACKS; CONTROL MEANS ASSOCIATED WITH EACH SUPPORT UNIT AND RESPONSIVE TO A CONTROL FLUID PRESSURE FOR CONTROLLING THE OPERATIONAL SEQUENCE OF THE ASSOCIATED SUPPORT UNIT AND ITS ASSOCIATED JACK; AND A FLUID PRESSURE CONNECTION LINKING THE CONTROL MEANS OF ONE SUPPORT UNIT WITH THE CONTROL MEANS OF THE NEXT SUPPORT UNIT IN THE SEQUENCE FOR TRANSMITTING SAID CONTROL FLUID PRESSURE FROM SAID ONE SUPPORT UNIT TO SAID NEXT SUPPORT UNIT; EACH SAID CONTROL MEANS INCLUDING IN SAID CONNECTION A FIRST FLUID FLOW SHUT-OFF VALVE FOR CONTROLLING THE FLOW OF FLUID THROUGH SAID CONNECTION, THE VALVE HAVING A FIRST SHUT-OFF MEMBER WITH A FIRST POSITION IN WHICH FLUID FLOW THROUGH THE CONNECTION IS PREVENTED AND A SECOND POSITION IN WHICH FLUID CAN FLOW THROUGH SAID CONNECTION AND MEANS ACTUATED BY THE JACK FOR MOVING THE FIRST SHUT-OFF MEMBER FROM THE FIRST POSITION TO THE SECOND WHEN THE JACK IS IN A PREDETERMINED OPERATIONAL POSITION AND A SECOND FLUID FLOW SHUT-OFF VALVE IN SAID CONNECTION FOR CONTROLLING THE FLOW OF FLUID THROUGH THE CONNECTION, THE SECOND VALVE HAVING A SECOND SHUT-OFF MEMBER WITH A FIRST POSITION IN WHICH FLUID FLOW THROUGH THE CONNECTION IS PREVENTED AND A SECOND POSITION IN WHICH FLUID CAN FLOW THROUGH SAID CONNECTION, AND A SECOND FLUID PRESSURE CONNECTION BETWEEN SAID SUPPORT UNIT AND THE SECOND VALVE FOR APPLYING SUPPORT UNIT PRESSURE TO THE SECOND SHUT-OFF MEMBER TO URGE THE LATTER FROM ITS FIRST POSITION TO ITS SECOND POSITION.
Claim 2
Dependent Claim
331 words
A MINE ROOF SUPPORT SYSTEM COMPRISING A PLURALITY OF EXTENSIBLE FLUID OPERATED MINE ROOF SUPPORT UNITS EACH HAVING AT LEAST ONE SUPPORT, THE UNITS BEING ARRANGED AT SPACED INTERVALS ALONG A MINERAL FACE FOR OPERATION IN A PREDETERMINED SEQUENCE; ANCHORAGE MEANS COMMON TO ALL THE SUPPORT UNITS; AT LEAST ONE FLUID OPERATED JACK ASSOCIATED WITH AND CONNECTED BETWEEN EACH SUPPORT UNIT AND THE ANCHORAGE MEANS FOR ADVANCING THE ASSOCIATED SUPPORT UNIT RELATIVE TO THE MINERAL FACE; A FLUID PRESSURE SUPPLY LINE FOR SUPPLYING OPERATING FLUID TO THE SUPPORT UNITS AND JACKS; CONTROL MEANS ASSOCIATED WITH EACH SUPPORT UNIT AND RESPONSIVE TO A CONTROL FLUID PRESSURE FOR CONTROLLING THE OPERATIONAL SEQUENCE OF THE ASSOCIATED SUPPORT UNIT AND ITS ASSOCIATED JACK; AND A FLUID PRESSURE CONNECTION LINKING THE CONTROL MEANS OF ONE SUPPORT UNIT WITH THE CONTROL MEANS OF THE NEXT SUPPORT UNIT IN THE SEQUENCE FOR TRANSMITTING SAID CONTROL FLUID PRESSURE FROM SAID ONE SUPPORT UNIT TO SAID NEXT SUPPORT UNIT; EACH SAID CONTROL MEANS INCLUDING IN SAID CONNECTION A FIRST FLUID FLOW SHUT-OFF VALVE FOR CONTROLLING THE FLOW OF FLUID THROUGH SAID CONNECTION, THE VALVE HAVING A FIRST SHUT-OFF MEMBER WITH A FIRST POSITION IN WHICH FLUID FLOW THROUGH THE CONNECTION IS PREVENTED AND A SECOND POSITION IN WHICH FLUID CAN FLOW THROUGH SAID CONNECTION AND MEANS ACTUATED BY THE JACK FOR MOVING THE FIRST SHUT-OFF MEMBER FROM THE FIRST POSITION TO THE SECOND WHEN THE JACK IS IN A PREDETERMINED OPERATIONAL POSITION AND A SECOND FLUID FLOW SHUT-OFF VALVE IN SAID CONNECTION FOR CONTROLLING THE FLOW OF FLUID THROUGH THE CONNECTION, THE SECOND VALVE HAVING A SECOND SHUT-OFF MEMBER WITH A FIRST POSITION IN WHICH FLUID FLOW THROUGH THE CONNECTION IS PREVENTED AND A SECOND POSITION IN WHICH FLUID CAN FLOW THROUGH SAID CONNECTION, AND A SECOND FLUID PRESSURE CONNECTION BETWEEN SAID SUPPORT UNIT AND THE SECOND VALVE FOR APPLYING SUPPORT UNIT PRESSURE TO THE SECOND SHUT-OFF MEMBER TO URGE THE LATTER FROM ITS FIRST POSITION TO ITS SECOND POSITION.
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) | 1968-11-08 | 1969-05-10 | 1969-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-08 | 1973-05-10 | 1973-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-08 | 1977-05-10 | 1977-11-09 | $7700.00 | Window Closed / Lapsed |