Patent US3254723A successfully refreshed from Google Patents.
US3254723A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Locking mechanism for well devices
Assignee: Otis Engineering Corp
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Filing: 1964-10-23
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Granted: 1966-06-07
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Expires: 1984-10-23
Abstract
No abstract record available.
Inventors
- 👤 Schramm Josephine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:51
CPC Classifications
E; E21; E21B; E21B23/00; E21B23/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
A WELL TOOL INCLUDING: AN ELONGATE MANDREL; A LOCK SLEEVE MOUNTED ON SAID MANDREL ANDSLIDABLE LONGITUDINALLY THEREON; SAID LOCK SLEEVE HAVING AN EXTERNAL LOCK SURFACE FORMED THERON; AND A LOCKING MEMBER MOVABLY MOUNTED ON SAID MANDREL AND HAVING A BORE AND A LOCKING SURFACE IN ITS BORE ENGAGEABLY BY THE LOCK SURFACAE OF SAID SLEEVE, WHEREBY SAID LOCKING MEMBER IS DISPLACED LATERALLY WITH RESPECT TO SAID MANDREL TO PROJECTING LOCKING POSITION; SAID LOCK SLEEVE BEING SLIDABLE ON SAID MANDREL TO A POSITION DISENGAGING THE LOCK SURFACE THEREON FROM THE LOCKING SURFACE IN THE BORE OF THE LOCKING MEMBER, WHEREBY SAID LOCKING MEMBER MAY MOVE LATERALLY WITH RESPECT TO THE MANDREL TO A RETRACTED POSITION, SAID ABRUPT LATERALLY EXTENDING PROJECTING STOP SHOULDER INTERMEDIATE ITS ENDS AND OPPOSITELY FACING PROJECTING LOCK SHOULDER SPACED LONGITUDINALLY FROMS AID STOP SHOULER.
Claim 2
Dependent Claim
136 words
A WELL TOOL INCLUDING: AN ELONGATE MANDREL; A LOCK SLEEVE MOUNTED ON SAID MANDREL ANDSLIDABLE LONGITUDINALLY THEREON; SAID LOCK SLEEVE HAVING AN EXTERNAL LOCK SURFACE FORMED THERON; AND A LOCKING MEMBER MOVABLY MOUNTED ON SAID MANDREL AND HAVING A BORE AND A LOCKING SURFACE IN ITS BORE ENGAGEABLY BY THE LOCK SURFACAE OF SAID SLEEVE, WHEREBY SAID LOCKING MEMBER IS DISPLACED LATERALLY WITH RESPECT TO SAID MANDREL TO PROJECTING LOCKING POSITION; SAID LOCK SLEEVE BEING SLIDABLE ON SAID MANDREL TO A POSITION DISENGAGING THE LOCK SURFACE THEREON FROM THE LOCKING SURFACE IN THE BORE OF THE LOCKING MEMBER, WHEREBY SAID LOCKING MEMBER MAY MOVE LATERALLY WITH RESPECT TO THE MANDREL TO A RETRACTED POSITION, SAID ABRUPT LATERALLY EXTENDING PROJECTING STOP SHOULDER INTERMEDIATE ITS ENDS AND OPPOSITELY FACING PROJECTING LOCK SHOULDER SPACED LONGITUDINALLY FROMS AID STOP SHOULER.
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) | 1969-06-06 | 1969-12-06 | 1970-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-06 | 1973-12-06 | 1974-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-06 | 1977-12-06 | 1978-06-07 | $7700.00 | Window Closed / Lapsed |