US2958619A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for heat treating teeth of gears and the like by induction heating
Assignee: Delapena and Son Ltd
•
Filing: 1956-04-11
•
Granted: 1960-11-01
•
Expires: 1976-04-11
Abstract
No abstract record available.
Inventors
- 👤 Frost Leonard Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:57
CPC Classifications
C; C21; C21D; C21D9/00; C21D9/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
212 words
THE METHOD OF SURFACE HARDENING THE FLANKS AND TROUGS OF GEAR TEETH OR LIKE ARTICLES BY MEANS OF HIGHFREQUENCY INDUCTION HEATING WHICH CONSISTS IN INSERTING AT THE LOCATION NORMALLY OCCUPIED BY A WORKING INDUCTOR A RELATIVELY FIXED DUMMY INDUCTOR INTO THE SPACE BETWEEN A PAIR OF GEAR TEETH OF A REVOLVABLE GEAR AND INTO CONTACT WITH THE ADJACENT FLANKS AND TROUGH SURFACE THEREOF THEREBY TO LOCATE THE GEAR TOOTH SPACE ANGULARLY WITH RELATION TO THE DUMMY INDUCTOR, HOLDING THE GEAR TOOTH SPACE IN SUCH ANGULAR POSITION AND INSERTING A RELATIVELY FIXED LOCATING PIN INTO THE SAID TOOTH SPACE AND INTO ENGAGE MENT WITH THE TOOTH FLANKS AT ONE SIDE OF THE DUMMY INDUCTOR, THEN REMOVING THE DUMMY INDUCTOR FROM THE TOOTH SPACE AND REPLACING SAME WITH A RELATIVELY FIXED WORKING INDUCTOR OF SLIGHTLY SMALLER SECTIONAL AREA SO THAT AN AIR GAP OF A KNOWN DIMENSION EXISTS BETWEEN THE SIDES AND END FACES OF THE WORKING INDUCTOR AND THE FLANK AND TROUGH SURFACES OF THE PARTIALLY SURROUNDING GEAR TEETH, TRAVERSING SAID WORKING INDUCTOR RELATIVE TO THE GEAR IN THE DIRECTION OF THE LENGTH OF THE TOOTH SPACE AND SIMULTANEOUSLY QUENCHING THE WORK AT THE TRAILING SIDE THEREOF TO EFFECT TE PROGRESSIVE HARDENING OF ADJACENT FLANKS AND TROUGH OF THE PAIR OF TEETH SIMULTANEOUSLY,
Claim 2
Independent Claim
212 words
THE METHOD OF SURFACE HARDENING THE FLANKS AND TROUGS OF GEAR TEETH OR LIKE ARTICLES BY MEANS OF HIGHFREQUENCY INDUCTION HEATING WHICH CONSISTS IN INSERTING AT THE LOCATION NORMALLY OCCUPIED BY A WORKING INDUCTOR A RELATIVELY FIXED DUMMY INDUCTOR INTO THE SPACE BETWEEN A PAIR OF GEAR TEETH OF A REVOLVABLE GEAR AND INTO CONTACT WITH THE ADJACENT FLANKS AND TROUGH SURFACE THEREOF THEREBY TO LOCATE THE GEAR TOOTH SPACE ANGULARLY WITH RELATION TO THE DUMMY INDUCTOR, HOLDING THE GEAR TOOTH SPACE IN SUCH ANGULAR POSITION AND INSERTING A RELATIVELY FIXED LOCATING PIN INTO THE SAID TOOTH SPACE AND INTO ENGAGE MENT WITH THE TOOTH FLANKS AT ONE SIDE OF THE DUMMY INDUCTOR, THEN REMOVING THE DUMMY INDUCTOR FROM THE TOOTH SPACE AND REPLACING SAME WITH A RELATIVELY FIXED WORKING INDUCTOR OF SLIGHTLY SMALLER SECTIONAL AREA SO THAT AN AIR GAP OF A KNOWN DIMENSION EXISTS BETWEEN THE SIDES AND END FACES OF THE WORKING INDUCTOR AND THE FLANK AND TROUGH SURFACES OF THE PARTIALLY SURROUNDING GEAR TEETH, TRAVERSING SAID WORKING INDUCTOR RELATIVE TO THE GEAR IN THE DIRECTION OF THE LENGTH OF THE TOOTH SPACE AND SIMULTANEOUSLY QUENCHING THE WORK AT THE TRAILING SIDE THEREOF TO EFFECT TE PROGRESSIVE HARDENING OF ADJACENT FLANKS AND TROUGH OF THE PAIR OF TEETH SIMULTANEOUSLY,
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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) | 1963-11-01 | 1964-05-02 | 1964-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-01 | 1968-05-02 | 1968-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-01 | 1972-05-02 | 1972-11-01 | $7700.00 | Window Closed / Lapsed |