Patent US3185808A successfully refreshed from Google Patents.
US3185808A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inductor for hardening gear teeth
Assignee: Ohio Crankshaft Co
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Filing: 1962-03-22
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Granted: 1965-05-25
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Expires: 1982-03-22
Abstract
No abstract record available.
Inventors
- 👤 Phillips N Sorensen
- 👤 Ralph P Alberts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:55
CPC Classifications
C; C21; C21D; C21D9/00; C21D9/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
IN A INDUCTOR FOR PROGRESSIVELY HEATING THE OPPOSITELY FACING WORKING SURFACES OF ADJACENT GEAR TEETH BY MOVING SAID INDUCTOR LONGITUDINALLY BETWEEN SAID TEETH, SAID INDUCTOR COMPRISING A GENERALLY U-SHAPED, ELECTRICAL CONDUCTOR ADAPTED TO EXTEND BETWEEN SAID TEETH AND HAVING SPACED LEGS TERMINATING IN A LOWER LONGITUDINALLY EXTENDING PORTION CLOSELY SPACED FROM THE ROOT OF SAID TEETH DURING USE, THE IMPROVEMENT COMPRISING: A LOW ELECTRICAL RESISTANCE MEMBER ADJACENT THE OUTERMOST PORTION OF SAID TEETH DURING USE AND BETWEEN SAID LEGS FOR CONTROLLING THE SHAPE OF THE HEATING PATTERN IN SAID WORKING SURFACES TO LIMIT THE HEATING AT THE OUTERMOST PORTIONS OF SAID TEETH, SAID LOW RESISTANCE MEMBER HAVING AN ELECTRICAL RESISTIVITY ON THE ORDER OF COPPER.
Claim 2
Dependent Claim
115 words
IN A INDUCTOR FOR PROGRESSIVELY HEATING THE OPPOSITELY FACING WORKING SURFACES OF ADJACENT GEAR TEETH BY MOVING SAID INDUCTOR LONGITUDINALLY BETWEEN SAID TEETH, SAID INDUCTOR COMPRISING A GENERALLY U-SHAPED, ELECTRICAL CONDUCTOR ADAPTED TO EXTEND BETWEEN SAID TEETH AND HAVING SPACED LEGS TERMINATING IN A LOWER LONGITUDINALLY EXTENDING PORTION CLOSELY SPACED FROM THE ROOT OF SAID TEETH DURING USE, THE IMPROVEMENT COMPRISING: A LOW ELECTRICAL RESISTANCE MEMBER ADJACENT THE OUTERMOST PORTION OF SAID TEETH DURING USE AND BETWEEN SAID LEGS FOR CONTROLLING THE SHAPE OF THE HEATING PATTERN IN SAID WORKING SURFACES TO LIMIT THE HEATING AT THE OUTERMOST PORTIONS OF SAID TEETH, SAID LOW RESISTANCE MEMBER HAVING AN ELECTRICAL RESISTIVITY ON THE ORDER OF COPPER.
References Cited (Backward Citations)
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Cited
US2647200A
Cited
US2709741A
Cited
US2790883A
Cited
US2810054A
Cited
US3109909A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-05-24 | 1968-11-23 | 1969-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-05-24 | 1972-11-23 | 1973-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-05-24 | 1976-11-23 | 1977-05-25 | $7700.00 | Window Closed / Lapsed |