US2930724A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for induction heating and quenching of metal
Assignee: Magnetic Heating Corp
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Filing: 1958-01-27
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Granted: 1960-03-29
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Expires: 1978-01-27
Abstract
No abstract record available.
Inventors
- 👤 Wallace C Rudd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:54
CPC Classifications
C; C21; C21D; C21D9/00; C21D9/52; C21D9/54; C21D9/56; C21D9/60; Y; Y02; Y02P; Y02P10/00; Y02P10/25
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
MET''OD FOR SURFACE-HARDENING A SUCCESSION OF SPACED AREAS ON AN ELONGATED METAL MEMBER BY THE USE OF HIGH FREQUENCY INDUCTION HEATING, WHICH METHOD COMPRISES: ADVANCING SUCH MEMBER IN A SUCCESSION OF STEPS TO PREDETERMINED POSITIONS WITHIN A FLOWING STREAM OF VOLATIZABLE COOLING LIQUID? AND SUBJECTING EACH SUCH AREA AT ONE OF SAID POSITIONS MOMENTARILY TO A HIGH FREQUENCY MAGNETIC FIELD OF SUFFICIENT INTENSITY QUICKLY TO HEAT ONLY THE SURFACE THEREOF TO HARDENING TEMPERATURE, EACH HEATED AREA ACTING TO VOLATILIZE THE LIQUID CONTACTING THEREWITH, THUS MOMENTARILY SUBSTANTIALLY COVERING SAME BY A HEATING-INSULATING LAYER OF VOLATILIZED LIQUID, WHICH LAYER COLLAPSES DUE TO THE FLOWING OF SAID STREAM UPON DISCONTINUANCE OF THE FIELD, THEREBY ALLOWING EACH SUCH AREA IMMEDIATELY TO BE QUENCHED BY SUCH FLOWING STREAM.
Claim 2
Dependent Claim
123 words
MET''OD FOR SURFACE-HARDENING A SUCCESSION OF SPACED AREAS ON AN ELONGATED METAL MEMBER BY THE USE OF HIGH FREQUENCY INDUCTION HEATING, WHICH METHOD COMPRISES: ADVANCING SUCH MEMBER IN A SUCCESSION OF STEPS TO PREDETERMINED POSITIONS WITHIN A FLOWING STREAM OF VOLATIZABLE COOLING LIQUID? AND SUBJECTING EACH SUCH AREA AT ONE OF SAID POSITIONS MOMENTARILY TO A HIGH FREQUENCY MAGNETIC FIELD OF SUFFICIENT INTENSITY QUICKLY TO HEAT ONLY THE SURFACE THEREOF TO HARDENING TEMPERATURE, EACH HEATED AREA ACTING TO VOLATILIZE THE LIQUID CONTACTING THEREWITH, THUS MOMENTARILY SUBSTANTIALLY COVERING SAME BY A HEATING-INSULATING LAYER OF VOLATILIZED LIQUID, WHICH LAYER COLLAPSES DUE TO THE FLOWING OF SAID STREAM UPON DISCONTINUANCE OF THE FIELD, THEREBY ALLOWING EACH SUCH AREA IMMEDIATELY TO BE QUENCHED BY SUCH FLOWING STREAM.
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) | 1963-03-29 | 1963-09-28 | 1964-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-29 | 1967-09-28 | 1968-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-29 | 1971-09-28 | 1972-03-29 | $7700.00 | Window Closed / Lapsed |