US3383100A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for hardening spaced bearing surfaces on a shaft-like workpiece
Assignee: Park Ohio Holdings Corp
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Filing: 1965-10-11
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Granted: 1968-05-14
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Expires: 1985-10-11
Abstract
No abstract record available.
Inventors
- 👤 Norbert R Balzer
- 👤 Albert E Hala
- 👤 George C Nebesar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:22
CPC Classifications
C; C21; C21D; C21D9/00; C21D9/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
AN APPARATUS FOR HARDENING THE BEARING SURFACES OF A SHAFT-LIKE WORKPIECE HAVING AN AXIS AND AXIALLY SPACED BEARING SURFACES, SAID APPARATUS COMPRISING: A TANK TO BE FILLED TO A GIVEN LEVEL WITH A QUENCHING FLUID, AN INDUCTOR HAVING A CONTOUR MATCHING SAID BEARING SURFACES FOR HEATING SAID SURFACE WHEN SAID INDUCTOR IS ENERGIZED BY A HIGH FREQUENCY POWER SOURCE, FIRST AND SECOND INDEPENDENTLY MOVABLE WORKPIECE SUPPORTS, EACH OF SAID SUPPORTS INCLUDING MEANS FOR HOLDING ONE OF SAID WORKPIECES AND MEANS FOR ROTATING SAID HELD WORKPIECE ABOUT ITS AXIS, MEANS FOR MOVING EACH OF SAID SUPPORTS INDEPENDENTLY BETWEEN A FIRST POSITION WITH SAID WORKPIECE BENEATH SAID GIVEN LEVEL AND A SECOND POSITION WITH SAID WORKPIECE ABOVE SAID GIVEN LEVEL, AND MEANS FOR MOVING SAID IN-
Claim 2
Independent Claim
124 words
AN APPARATUS FOR HARDENING THE BEARING SURFACES OF A SHAFT-LIKE WORKPIECE HAVING AN AXIS AND AXIALLY SPACED BEARING SURFACES, SAID APPARATUS COMPRISING: A TANK TO BE FILLED TO A GIVEN LEVEL WITH A QUENCHING FLUID, AN INDUCTOR HAVING A CONTOUR MATCHING SAID BEARING SURFACES FOR HEATING SAID SURFACE WHEN SAID INDUCTOR IS ENERGIZED BY A HIGH FREQUENCY POWER SOURCE, FIRST AND SECOND INDEPENDENTLY MOVABLE WORKPIECE SUPPORTS, EACH OF SAID SUPPORTS INCLUDING MEANS FOR HOLDING ONE OF SAID WORKPIECES AND MEANS FOR ROTATING SAID HELD WORKPIECE ABOUT ITS AXIS, MEANS FOR MOVING EACH OF SAID SUPPORTS INDEPENDENTLY BETWEEN A FIRST POSITION WITH SAID WORKPIECE BENEATH SAID GIVEN LEVEL AND A SECOND POSITION WITH SAID WORKPIECE ABOVE SAID GIVEN LEVEL, AND MEANS FOR MOVING SAID IN-
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) | 1971-05-14 | 1971-11-13 | 1972-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-14 | 1975-11-13 | 1976-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-14 | 1979-11-13 | 1980-05-14 | $7700.00 | Window Closed / Lapsed |