Patent US3299957A successfully refreshed from Google Patents.
US3299957A
Expired / Lapsed
US
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Drill string suspension arrangement
Assignee: Leyman Corp
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Filing: 1964-08-14
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Granted: 1967-01-24
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Expires: 1984-08-14
Abstract
No abstract record available.
Inventors
- 👤 Joseph V O'neill
- 👤 Homanick George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:07
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/02; E21B33/03; E21B33/06; E21B19/00; E21B19/20; E21B33/061; E21B33/062; Y; Y10; Y10T; Y10T24/00; Y10T24/44; Y10T24/44068
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
IN A WELL DRILLING APPARATUS HAVING A DRILL STRING; STRING SUSPENSION MEANS COMPRISING A FIXED HOUSING, PAIR OF OPPOSED JAWS MOUNTED IN SAID HOUSING FOR MOVEMENT RADIALLY INTO AND OUT OF GRIPPING ENGAGEMENT WITH SAID DRILL STRING, SAID JAWS HAVING COOPERATING OVERLAPPING PORTIONS DISPOSED IN OVERLAPPING RELATIONSHIP WITH EACH OTHER WHEN SAID JAWS ARE IN SAID GRIPPING POSITION, PIN MEANS MOVABLE THROUGH THE OVERLAPPING PORTIONS OF SAID JAWS WHEN SAID JAWS ARE IN SAID GRIPPING POSITION TO LOCK THE JAWS IN SAID GRIPPING POSITION, AND POWER MEANS COUPLED TO SAID PIN MEANS FOR MOVING SAID PIN MEANS INTO AND OUT OF LOCKING RELATIONSHIP WITH SAID JAWS.
Claim 2
Dependent Claim
106 words
IN A WELL DRILLING APPARATUS HAVING A DRILL STRING; STRING SUSPENSION MEANS COMPRISING A FIXED HOUSING, PAIR OF OPPOSED JAWS MOUNTED IN SAID HOUSING FOR MOVEMENT RADIALLY INTO AND OUT OF GRIPPING ENGAGEMENT WITH SAID DRILL STRING, SAID JAWS HAVING COOPERATING OVERLAPPING PORTIONS DISPOSED IN OVERLAPPING RELATIONSHIP WITH EACH OTHER WHEN SAID JAWS ARE IN SAID GRIPPING POSITION, PIN MEANS MOVABLE THROUGH THE OVERLAPPING PORTIONS OF SAID JAWS WHEN SAID JAWS ARE IN SAID GRIPPING POSITION TO LOCK THE JAWS IN SAID GRIPPING POSITION, AND POWER MEANS COUPLED TO SAID PIN MEANS FOR MOVING SAID PIN MEANS INTO AND OUT OF LOCKING RELATIONSHIP WITH SAID JAWS.
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) | 1970-01-23 | 1970-07-25 | 1971-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-23 | 1974-07-25 | 1975-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-23 | 1978-07-25 | 1979-01-24 | $7700.00 | Window Closed / Lapsed |