Patent US3695598A successfully refreshed from Google Patents.
US3695598A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for quenching a tubular shaped structure
Assignee: Individual
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Filing: 1970-05-06
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Granted: 1972-10-03
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Expires: 1990-05-06
Abstract
Abstract Apparatus for continuously quenching a thick-walled tubular structure having electromagnetic induction heating means above a quench tank wherein the workpiece is rotated through the heating and quenching means.
Inventors
- 👤 Akira Ujue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:55
CPC Classifications
C; C21; C21D; C21D1/00; C21D1/62; C21D1/63; C21D1/34; C21D1/42; Y; Y02; Y02P; Y02P10/00; Y02P10/25
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
142 words
An apparatus for tempering a tubular shaped thick walled steel structure including a tank containing a cooling medium, variable speed-rotatable supporting means to impart rotary motion to said structure while partially immersed in said cooling medium, cooling water injection means disposed within said tank below the surface level of said cooling medium in the path of said rotating steel structure to eject additional cooling medium on said steel structure and heating means disposed above the level of said cooling medium in the path of said rotating steel structure to impart heat to said steel structure, said heating means including a first heating element to impart heat to said structure as it rotates and a second heating element to impart additional heat after the steel structure passes through said first heating element but before said steel structure is immersed into said cooling medium.
Claim 2
Independent Claim
142 words
An apparatus for tempering a tubular shaped thick walled steel structure including a tank containing a cooling medium, variable speed-rotatable supporting means to impart rotary motion to said structure while partially immersed in said cooling medium, cooling water injection means disposed within said tank below the surface level of said cooling medium in the path of said rotating steel structure to eject additional cooling medium on said steel structure and heating means disposed above the level of said cooling medium in the path of said rotating steel structure to impart heat to said steel structure, said heating means including a first heating element to impart heat to said structure as it rotates and a second heating element to impart additional heat after the steel structure passes through said first heating element but before said steel structure is immersed into said cooling medium.
Claim 3
Independent Claim
111 words
An apparatus for tempering a tubular shaped thick walled steel structure including a tank containing a cooling medium, variable speed-rotatable supporting means to impart rotary motion to said structure while partially immersed in said cooling medium, cooling water injection means disposed within said tank below the surface level of said cooling medium in the path of said rotating steel structure to eject additional cooling medium on said steel structure and heating means disposed above the level of said cooling medium in the path of said rotating steel structure to impart heat to said steel structure, said heating means including low frequency electromagnetic induction heating coils and high frequency electromagnetic induction coils.
Claim 4
Independent Claim
111 words
An apparatus for tempering a tubular shaped thick walled steel structure including a tank containing a cooling medium, variable speed-rotatable supporting means to impart rotary motion to said structure while partially immersed in said cooling medium, cooling water injection means disposed within said tank below the surface level of said cooling medium in the path of said rotating steel structure to eject additional cooling medium on said steel structure and heating means disposed above the level of said cooling medium in the path of said rotating steel structure to impart heat to said steel structure, said heating means including low frequency electromagnetic induction heating coils and high frequency electromagnetic induction coils.
Claim 5
Independent Claim
119 words
An apparatus for tempering a tubular shaped thick walled steel structure including a tank containing a cooling medium, variable speed-rotatable Supporting means to impart rotary motion to said structure while partially immersed in said cooling medium, cooling water injection means disposed within said tank below the surface level of said cooling medium in the path of said rotating steel structure to eject additional cooling medium on said steel structure and heating means disposed above the level of said cooling medium in the path of said rotating steel structure to impart heat to said steel structure, said cooling means including valves to vary the intensity of the cooling medium ejected onto the inner and outer surface of said steel structure.
Claim 6
Independent Claim
119 words
An apparatus for tempering a tubular shaped thick walled steel structure including a tank containing a cooling medium, variable speed-rotatable Supporting means to impart rotary motion to said structure while partially immersed in said cooling medium, cooling water injection means disposed within said tank below the surface level of said cooling medium in the path of said rotating steel structure to eject additional cooling medium on said steel structure and heating means disposed above the level of said cooling medium in the path of said rotating steel structure to impart heat to said steel structure, said cooling means including valves to vary the intensity of the cooling medium ejected onto the inner and outer surface of said steel structure.
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) | 1975-10-03 | 1976-04-03 | 1976-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-03 | 1980-04-03 | 1980-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-03 | 1984-04-03 | 1984-10-03 | $7700.00 | Window Closed / Lapsed |