US3120950A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tong return device
Assignee: Individual
•
Filing: 1959-06-05
•
Granted: 1964-02-11
•
Expires: 1979-06-05
Abstract
No abstract record available.
Inventors
- 👤 Dean L Hardison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:08
CPC Classifications
E; E21; E21B; E21B19/00; E21B19/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
146 words
IN A WELL RIG EQUIPMENT INCLUDING A RATCHET-TYPE TONG OR THE LIKE AND POWER MEANS FOR OPERATING THE TONG, A TONG RETURN UNIT COMPRISING A SUPPORT ATTACHING THE UNIT TO A RIG PLATFORM OR THE LIKE, AN ELONGATED ARM, MEANS SECURING SAID ARM TO SAID SUPPORT FOR SWINGING MOVEMENT TOWARD AND AWAY FROM A WELL HEAD AND FOR BIASING SAID ARM TO RETURN TO A PREDETERMINED STARTING POSITION ON SAID SUPPORT, MEANS CONNECTING THE OUTER END OF SAID ARM TO THE OUTER END OF THE TONG FOR OPERATING MOVEMENT WITH THE TONG AGAINST THE RESISTANCE OF SAID MEANS FOR SECURING AND BIASING WHEREBY UPON RELEASE OF THE TONG SAID MEANS FOR SECURING AND BIASING RETURNS THE TONG TO ITS STARTING POSITION, AND MEANS FOR ADJUSTING THE ANGULAR POSITION OF SAID ARM ABOUT AN AXIS TRANSVERSE TO THE SWINGING AXIS OF SAID ARM WITHOUT DISMANTLING THE UNIT.
Claim 2
Dependent Claim
146 words
IN A WELL RIG EQUIPMENT INCLUDING A RATCHET-TYPE TONG OR THE LIKE AND POWER MEANS FOR OPERATING THE TONG, A TONG RETURN UNIT COMPRISING A SUPPORT ATTACHING THE UNIT TO A RIG PLATFORM OR THE LIKE, AN ELONGATED ARM, MEANS SECURING SAID ARM TO SAID SUPPORT FOR SWINGING MOVEMENT TOWARD AND AWAY FROM A WELL HEAD AND FOR BIASING SAID ARM TO RETURN TO A PREDETERMINED STARTING POSITION ON SAID SUPPORT, MEANS CONNECTING THE OUTER END OF SAID ARM TO THE OUTER END OF THE TONG FOR OPERATING MOVEMENT WITH THE TONG AGAINST THE RESISTANCE OF SAID MEANS FOR SECURING AND BIASING WHEREBY UPON RELEASE OF THE TONG SAID MEANS FOR SECURING AND BIASING RETURNS THE TONG TO ITS STARTING POSITION, AND MEANS FOR ADJUSTING THE ANGULAR POSITION OF SAID ARM ABOUT AN AXIS TRANSVERSE TO THE SWINGING AXIS OF SAID ARM WITHOUT DISMANTLING THE UNIT.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-02-10 | 1967-08-12 | 1968-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-02-10 | 1971-08-12 | 1972-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-02-10 | 1975-08-12 | 1976-02-11 | $7700.00 | Window Closed / Lapsed |