Patent US3276819A successfully refreshed from Google Patents.
US3276819A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Backing arrangement
Assignee: —
•
Filing: —
•
Granted: 1966-10-04
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Expires: 1983-10-04
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:49
CPC Classifications
E; E21; E21C; E21C35/00; E21C35/08; E21C35/12; E21C35/14; E21F; E21F13/00; E21F13/08; E21F13/086
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
209 words
BACKING ARRANGEMENT FOR LATERAL URGING ABUTMENT AGAINST A MINING CONVEYOR ADAPTED TO EXTEND LONGITUDINALLY ALONG A MINE FACE TO URGE SUCH CONVEYOR TOWARD THE MINE FACE, WHICH COMPRISES UNITARY BASE MEANS FOR ENGAGING THE MINE FLOOR AND MINE CEILING, FIRST URGING MEANS AND SECOND URGING MEANS, EACH SAID URGING MEANS BEING OPERATIVELY CONNECTED TO SAID BASE MEANS, EACH SAID URGING MEANS INCLUDING A LINEARLY DISPLACEABLE URGING MEMBER HAVING A FREE END REMOTE FROM SAID BASE MEANS, THE LINEAR DISPLACEABLE MEMBER OF ONE OF SAID URGING MEANS BEING OPERATIVELY SITUATED ABOVE THE DISPLACEABLE MEMBER OF THE OTHER URGING MEANS, AN ABUTMENT BAR DISPOSED IN A SUBSTANTIALLY VERTICAL PLANE AND PIVOTALLY CONNECTED BY A SEPARATE RESPECTIVE PIVOT TO EACH OF SAID FREE ENDS TO LINKABLY INTERCONNECT SAID MEMBERS AT THEIR FREE ENDS AND TO PERMIT ANGULAR DISPLACEMENT OF SAID BAR IN SAID VERTICAL PLANE IN RESPONSE TO LINEAR DISPLACEMENT OF AT LEAST ONE OF SAID DISPLACEABLE MEMBERS, WHEREBY DURING ABUTMENT OF SAID BAR AGAINST THE SIDE OF SUCH CONVEYOR REMOTE FROM THE MINE FACE SAID FIRST AND SECOND URGING MEANS WILL URGE SAID CONVEYOR TOWARD THE MINE FACE WITH A RESULTANT DIRECTION OF FORCE WHICH VARIES IN DEPENDENCE UPON THE ANGULAR DISPOSITION OF SAID BAR WITH RESPECT TO THE MINE FLOOR.
Claim 2
Dependent Claim
209 words
BACKING ARRANGEMENT FOR LATERAL URGING ABUTMENT AGAINST A MINING CONVEYOR ADAPTED TO EXTEND LONGITUDINALLY ALONG A MINE FACE TO URGE SUCH CONVEYOR TOWARD THE MINE FACE, WHICH COMPRISES UNITARY BASE MEANS FOR ENGAGING THE MINE FLOOR AND MINE CEILING, FIRST URGING MEANS AND SECOND URGING MEANS, EACH SAID URGING MEANS BEING OPERATIVELY CONNECTED TO SAID BASE MEANS, EACH SAID URGING MEANS INCLUDING A LINEARLY DISPLACEABLE URGING MEMBER HAVING A FREE END REMOTE FROM SAID BASE MEANS, THE LINEAR DISPLACEABLE MEMBER OF ONE OF SAID URGING MEANS BEING OPERATIVELY SITUATED ABOVE THE DISPLACEABLE MEMBER OF THE OTHER URGING MEANS, AN ABUTMENT BAR DISPOSED IN A SUBSTANTIALLY VERTICAL PLANE AND PIVOTALLY CONNECTED BY A SEPARATE RESPECTIVE PIVOT TO EACH OF SAID FREE ENDS TO LINKABLY INTERCONNECT SAID MEMBERS AT THEIR FREE ENDS AND TO PERMIT ANGULAR DISPLACEMENT OF SAID BAR IN SAID VERTICAL PLANE IN RESPONSE TO LINEAR DISPLACEMENT OF AT LEAST ONE OF SAID DISPLACEABLE MEMBERS, WHEREBY DURING ABUTMENT OF SAID BAR AGAINST THE SIDE OF SUCH CONVEYOR REMOTE FROM THE MINE FACE SAID FIRST AND SECOND URGING MEANS WILL URGE SAID CONVEYOR TOWARD THE MINE FACE WITH A RESULTANT DIRECTION OF FORCE WHICH VARIES IN DEPENDENCE UPON THE ANGULAR DISPOSITION OF SAID BAR WITH RESPECT TO THE MINE FLOOR.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-03 | 1970-04-04 | 1970-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-03 | 1974-04-04 | 1974-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-03 | 1978-04-04 | 1978-10-04 | $7700.00 | Window Closed / Lapsed |