Patent US3109523A successfully refreshed from Google Patents.
US3109523A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Folding derrick
Assignee: SKYTOP RIG CO
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Filing: 1960-09-01
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Granted: 1963-11-05
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Expires: 1980-09-01
Abstract
No abstract record available.
Inventors
- 👤 Bynum W Moller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:44
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/02; E21B7/023; B; B66; B66C; B66C23/00; B66C23/18; B66C23/36; B66C2700/00; B66C2700/03; B66C2700/0321; B66C2700/0357
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
181 words
A FOLDING DERRICK COMPRISING, A SUPPORT BASE, A LOWER DERRICK SECTION, MEANS PIVOTALLY CONNECTING SAID LOWER DERRICK SECTION TO SAID SUPPORT BASE FOR PIVOTAL MOVEMENT REARWARDLY FROM A SUBSTANTIALLY VERTICAL POSITION, AN UPPER DERRICK SECTION, MEANS PIVOTALLY CONNECTING SAID UPPER DERRICK SECTION TO SAID LOWER DERRICK SECTION FOR PIVOTAL MOVEMENT OF SAID UPPER DERRICK SECTION FORWARDLY FROM A SUBSTANTIALLY VERTICAL POSITION, A DOUBLEACTING FLUID-OPERATED ACTUATING ASSEMBLY HAVING ITS UPPER END CONNECTED TO AN INTERMEDIATE PORTION ONLY OF SAID UPPER DERRICK SECTION AND HAVING ITS LOWER END CONNECTED TO SAID SUPPORT BASE FOR PIVOTAL MOVEMENT WITH RESPECT THERETO, SAID UPPER END BEING DISPOSED REARWARDLY OF SAID LOWER END WHEN SAID LOWER DERRICK SECTION IS INCLINED REARWARDLY FROM ITS SUBSTANTIALLY VERTICAL POSITION, AND MEANS FOR APPLYING FLUID PRESSURE IN SAID ASSEMBLY FOR PIVOTING BOTH SAID UPPER DERRICK SECTION AND SAID LOWER DERRICK SECTION TO THEIR SUBSTANTIALLY VERTICAL POSITION BY PULLING ON SAID UPPER DERRICK SECTION TO MOVE SAID LOWER DERRICK SECTION FORWARDLY AS A UNIT TO A SUBSTANTIALLY VERTICAL POSITION AND TO PUSH SAID UPPER DERRICK SECTION UPWARDLY TO SAID SUBSTANTIALLY VERTICAL POSITION.
Claim 2
Dependent Claim
181 words
A FOLDING DERRICK COMPRISING, A SUPPORT BASE, A LOWER DERRICK SECTION, MEANS PIVOTALLY CONNECTING SAID LOWER DERRICK SECTION TO SAID SUPPORT BASE FOR PIVOTAL MOVEMENT REARWARDLY FROM A SUBSTANTIALLY VERTICAL POSITION, AN UPPER DERRICK SECTION, MEANS PIVOTALLY CONNECTING SAID UPPER DERRICK SECTION TO SAID LOWER DERRICK SECTION FOR PIVOTAL MOVEMENT OF SAID UPPER DERRICK SECTION FORWARDLY FROM A SUBSTANTIALLY VERTICAL POSITION, A DOUBLEACTING FLUID-OPERATED ACTUATING ASSEMBLY HAVING ITS UPPER END CONNECTED TO AN INTERMEDIATE PORTION ONLY OF SAID UPPER DERRICK SECTION AND HAVING ITS LOWER END CONNECTED TO SAID SUPPORT BASE FOR PIVOTAL MOVEMENT WITH RESPECT THERETO, SAID UPPER END BEING DISPOSED REARWARDLY OF SAID LOWER END WHEN SAID LOWER DERRICK SECTION IS INCLINED REARWARDLY FROM ITS SUBSTANTIALLY VERTICAL POSITION, AND MEANS FOR APPLYING FLUID PRESSURE IN SAID ASSEMBLY FOR PIVOTING BOTH SAID UPPER DERRICK SECTION AND SAID LOWER DERRICK SECTION TO THEIR SUBSTANTIALLY VERTICAL POSITION BY PULLING ON SAID UPPER DERRICK SECTION TO MOVE SAID LOWER DERRICK SECTION FORWARDLY AS A UNIT TO A SUBSTANTIALLY VERTICAL POSITION AND TO PUSH SAID UPPER DERRICK SECTION UPWARDLY TO SAID SUBSTANTIALLY VERTICAL 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) | 1966-11-04 | 1967-05-06 | 1967-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-11-04 | 1971-05-06 | 1971-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-11-04 | 1975-05-06 | 1975-11-05 | $7700.00 | Window Closed / Lapsed |