US3610869A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High frequency current resistance welding method for making shaped products
Assignee: Nippon Steel Corp
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Filing: 1969-01-21
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Granted: 1971-10-05
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Expires: 1989-01-21
Abstract
Abstract In the high frequency current resistance welding of the materials requiring different heat capacities, a method for pressure welding of the materials after preheating the material requiring more heat at a position before the welding point to a temperature between 250* and 1,050* C. in an area more than onethird wider than the thickness of the material requiring less heat.
Inventors
- 👤 Teiji Ito
- 👤 Takeshi Nishi
- 👤 Arinobu Yamada
- 👤 Kunimasa Jono
- 👤 Hikaru Aihara
- 👤 Takashi Maeba
- 👤 Nobuji Kawae
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:17
CPC Classifications
B; B23; B23K; B23K13/00; B23K13/01; B23K13/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
103 words
In the pressure welding of a web material to a flange material by high-frequency current resistance method to produce a T-shaped product or similarly shaped products, the improvement comprising placing between said flange and web materials an electrode having two projections aligned with both edges of the end of said web material and directed toward the surface of the flange material, and preheating the surface portions of said flange material which are opposite to said projections of said electrode over a width more than one-third of the width of said end of the web material to temperature between 250* C. and 1,050* C.
Claim 2
Dependent Claim
103 words
In the pressure welding of a web material to a flange material by high-frequency current resistance method to produce a T-shaped product or similarly shaped products, the improvement comprising placing between said flange and web materials an electrode having two projections aligned with both edges of the end of said web material and directed toward the surface of the flange material, and preheating the surface portions of said flange material which are opposite to said projections of said electrode over a width more than one-third of the width of said end of the web material to temperature between 250* C. and 1,050* C.
Claim 3
Dependent Claim
94 words
In the pressure welding of a web material to a flange material by the high-frequency current-resistance method to produce a T-shaped product or similarly shaped products, the improvement comprising preheating said flange material over an area more then one-third wider than the width of the end to be welded of said web material to a temperature of between 250* C. to 1,050* C., said preheating being accomplished by a heat source sepaRate from the welding heat source and comprising a high-frequency generator with an induction coil positioned in the vicinity of said flange material.
Claim 4
Dependent Claim
94 words
In the pressure welding of a web material to a flange material by the high-frequency current-resistance method to produce a T-shaped product or similarly shaped products, the improvement comprising preheating said flange material over an area more then one-third wider than the width of the end to be welded of said web material to a temperature of between 250* C. to 1,050* C., said preheating being accomplished by a heat source sepaRate from the welding heat source and comprising a high-frequency generator with an induction coil positioned in the vicinity of said flange material.
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) | 1974-10-04 | 1975-04-05 | 1975-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-04 | 1979-04-05 | 1979-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-04 | 1983-04-05 | 1983-10-05 | $7700.00 | Window Closed / Lapsed |