US3342520A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipe elevator
Assignee: Dresser Industries Inc
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Filing: 1966-05-12
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Granted: 1967-09-19
•
Expires: 1986-05-12
Abstract
No abstract record available.
Inventors
- 👤 Charles W Haynes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:07
CPC Classifications
E; E21; E21B; E21B19/00; E21B19/02; E21B19/06; E21B19/07
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
173 words
A PIPE ELEVATOR COMPRISING, IN COMBINATION, BODY MEANS HAVING PORTIONS THEREOF SHAPED TO RECEIVE BAILS OR THE LIKE FOR SUSPENDING THE ELEVATOR FROM A LIFTING MEANS, SAID BODY MEANS INCLUDING A SLIP CARRIER PORTION HAVING AN INNER SURFACE AND PROVIDING A SLIP RECEIVING SPACE UPWARDLY AND OUTWARDLY OF SAID INNER SURFCE, AT LEAST ONE PIPE ENGAGING SLIP WITHIN THE SLIP CARRIER PORTION AND HAVING AN OUTER SURFACE COMPLEMENTARY TO SAID INNER SURFACE SO AS TO MATE THEREWITH WHEN THE SLIPS ARE IN PIPE ENGAGING POSITION, A ROTATABLE MEMBER CARRIED BY SAID BODY MEANS ABOVE THE SLIP, A CAM AND CAM FOLLOWER FOR THE SLIP, ONE OF THE CAM AND CAM FOLLOWER BEING CARRIED BY THE ROTATABLE MEMBER AND THE OTHER BEING ATTACHED TO THE SLIP, THE CAM HAVING A CAM SURFACE ENGAGED BY THE FOLLOWER SUCH THAT AS THE ROTATABLE MEMBER IS ROTATED IN ONE DIRECTION, THAT CAM''S SURFACE CAUSES THE SLIP TO BE RAISED VERTICALLY OUT OF ENGAGEMENT WITH SAID INNER SURFACE AND THEN MOVED LATERALLY OUTWARDLY INTO SAID SLIP RECEIVING SPACE.
Claim 2
Dependent Claim
173 words
A PIPE ELEVATOR COMPRISING, IN COMBINATION, BODY MEANS HAVING PORTIONS THEREOF SHAPED TO RECEIVE BAILS OR THE LIKE FOR SUSPENDING THE ELEVATOR FROM A LIFTING MEANS, SAID BODY MEANS INCLUDING A SLIP CARRIER PORTION HAVING AN INNER SURFACE AND PROVIDING A SLIP RECEIVING SPACE UPWARDLY AND OUTWARDLY OF SAID INNER SURFCE, AT LEAST ONE PIPE ENGAGING SLIP WITHIN THE SLIP CARRIER PORTION AND HAVING AN OUTER SURFACE COMPLEMENTARY TO SAID INNER SURFACE SO AS TO MATE THEREWITH WHEN THE SLIPS ARE IN PIPE ENGAGING POSITION, A ROTATABLE MEMBER CARRIED BY SAID BODY MEANS ABOVE THE SLIP, A CAM AND CAM FOLLOWER FOR THE SLIP, ONE OF THE CAM AND CAM FOLLOWER BEING CARRIED BY THE ROTATABLE MEMBER AND THE OTHER BEING ATTACHED TO THE SLIP, THE CAM HAVING A CAM SURFACE ENGAGED BY THE FOLLOWER SUCH THAT AS THE ROTATABLE MEMBER IS ROTATED IN ONE DIRECTION, THAT CAM''S SURFACE CAUSES THE SLIP TO BE RAISED VERTICALLY OUT OF ENGAGEMENT WITH SAID INNER SURFACE AND THEN MOVED LATERALLY OUTWARDLY INTO SAID SLIP RECEIVING SPACE.
References Cited (Backward Citations)
US1777549A
Cited
US2641816A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-18 | 1971-03-20 | 1971-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-18 | 1975-03-20 | 1975-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-18 | 1979-03-20 | 1979-09-19 | $7700.00 | Window Closed / Lapsed |