Patent US3086783A successfully refreshed from Google Patents.
US3086783A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Expanding mandrel for machining pipe ends
Assignee: United States Steel Corp
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Filing: 1960-08-17
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Granted: 1963-04-23
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Expires: 1980-08-17
Abstract
No abstract record available.
Inventors
- 👤 Kelso John Wallace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:41
CPC Classifications
B; B23; B23B; B23B31/00; B23B31/40; B23B31/404; B23B31/4053; B23B31/406; B23G; B23G1/00; B23G1/22; Y; Y10; Y10T; Y10T279/00; Y10T279/10; Y10T279/1021; Y10T279/1037; Y10T279/1041; Y10T279/1049
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
148 words
AN EXPANDING MANDREL COMPRISING A HUB, AXIALLY SPACED FLANGES THEREON, THE PERIPHERIES OF THE FLANGES HAVING T-SHAPED SLOTS SPACED CIRCUMFERENTIALLY THEREOF, THE SLOTS IN ONE FLANGE BEING RADIALLY DEEPER THAN THOSE IN THE OTHER, T-SECTION WEDGES HAVING INNER EDGES AT AN ACUTE ANGLE TO THE AXIS OF THE HUB, SLIDABLE IN SAID SLOTS, SPRING MEANS CONNECTED TO SAID WEDGES AND ONE OF SAID FLANGES TENDING TO EFFECT AXIAL MOVEMENT OF THE WEDGES IN SUCH DIRECTION THAT THEY ALSO MOVE RADIALLY OUTWARD, SAID HUB HAVING A TAPERED BORE THEREIN, A THRUSTER HAVING A TAPERED NOSE ADAPTED TO SEAT IN SAID BORE AND A PUSHER PLATE ON SAID THRUSTER ADAPTED TO ENGAGE THE ENDS OF SAID WEDGES AND MOVE THEM AXIALLY AGAINST THE FORCE OF SAID SPRING MEANS, SAID ANGLE BEING SUCH THAT FRICTION BETWEEN SAID INNER EDGES AND SAID SLOTS PREVENTS DISPLACEMENT OF THE WEDGES BY RADIAL PRESSURE THEREON.
Claim 2
Dependent Claim
148 words
AN EXPANDING MANDREL COMPRISING A HUB, AXIALLY SPACED FLANGES THEREON, THE PERIPHERIES OF THE FLANGES HAVING T-SHAPED SLOTS SPACED CIRCUMFERENTIALLY THEREOF, THE SLOTS IN ONE FLANGE BEING RADIALLY DEEPER THAN THOSE IN THE OTHER, T-SECTION WEDGES HAVING INNER EDGES AT AN ACUTE ANGLE TO THE AXIS OF THE HUB, SLIDABLE IN SAID SLOTS, SPRING MEANS CONNECTED TO SAID WEDGES AND ONE OF SAID FLANGES TENDING TO EFFECT AXIAL MOVEMENT OF THE WEDGES IN SUCH DIRECTION THAT THEY ALSO MOVE RADIALLY OUTWARD, SAID HUB HAVING A TAPERED BORE THEREIN, A THRUSTER HAVING A TAPERED NOSE ADAPTED TO SEAT IN SAID BORE AND A PUSHER PLATE ON SAID THRUSTER ADAPTED TO ENGAGE THE ENDS OF SAID WEDGES AND MOVE THEM AXIALLY AGAINST THE FORCE OF SAID SPRING MEANS, SAID ANGLE BEING SUCH THAT FRICTION BETWEEN SAID INNER EDGES AND SAID SLOTS PREVENTS DISPLACEMENT OF THE WEDGES BY RADIAL PRESSURE THEREON.
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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) | 1966-04-22 | 1966-10-22 | 1967-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-22 | 1970-10-22 | 1971-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-22 | 1974-10-22 | 1975-04-23 | $7700.00 | Window Closed / Lapsed |