US2845377A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the inductive hardening of elongated workpieces
Assignee: Deutsche Edelstahlwerke AG
•
Filing: 1956-03-02
•
Granted: 1958-07-29
•
Expires: 1976-03-02
Abstract
No abstract record available.
Inventors
- 👤 Seulen Gerhard
- 👤 Connert Winfried
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:22
CPC Classifications
C; C21; C21D; C21D1/00; C21D1/06; C21D1/09; C21D1/10; H; H05; H05B; H05B6/00; H05B6/02; H05B6/36; H05B6/40; Y; Y02; Y02P; Y02P10/00; Y02P10/25
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
A FORWARD FEED PROCESS OF SURFACE HARDENING FERROUS ROLLS, BY INDUCTIVE HEATING AND QUENCHING, WHICH COMPRISES RAPIDLY HEATING THE ROLLS BY MEANS OF AT LEAST ONE LEADING INDUCTOR TO THE TEMPERATURE SUITABLE FOR HARDENING, MAINTANING THE SAID TEMPERATURE BY MEANS OF A FOLLOWING INDUCTOR, AND THEN QUENCHING THE ROLLS AND CONTROLLING THE LEADING INDUCTOR INDEPENDENTLY OF THE FOLLOWING INDUCTOR AND IN TIME RELATION TO THE RELATIVE MOVEMENT SO THAT THE HEATING EFFECT OF THE SAID LEADING INDUCTOR IS REDUCED WHEN AN EDGE OF THE WORKPIECE IS IN THE EFFECTIVE RANGE THEREOF AND WHILST THE FOLLOWING INDUCTOR OR HEATER REMAINS IN OPERATION.
Claim 2
Dependent Claim
101 words
A FORWARD FEED PROCESS OF SURFACE HARDENING FERROUS ROLLS, BY INDUCTIVE HEATING AND QUENCHING, WHICH COMPRISES RAPIDLY HEATING THE ROLLS BY MEANS OF AT LEAST ONE LEADING INDUCTOR TO THE TEMPERATURE SUITABLE FOR HARDENING, MAINTANING THE SAID TEMPERATURE BY MEANS OF A FOLLOWING INDUCTOR, AND THEN QUENCHING THE ROLLS AND CONTROLLING THE LEADING INDUCTOR INDEPENDENTLY OF THE FOLLOWING INDUCTOR AND IN TIME RELATION TO THE RELATIVE MOVEMENT SO THAT THE HEATING EFFECT OF THE SAID LEADING INDUCTOR IS REDUCED WHEN AN EDGE OF THE WORKPIECE IS IN THE EFFECTIVE RANGE THEREOF AND WHILST THE FOLLOWING INDUCTOR OR HEATER REMAINS IN OPERATION.
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) | 1961-07-28 | 1962-01-27 | 1962-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-28 | 1966-01-27 | 1966-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-28 | 1970-01-27 | 1970-07-29 | $7700.00 | Window Closed / Lapsed |