Patent US3175284A successfully refreshed from Google Patents.
US3175284A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of friction welding dissimilar metals
Assignee: Chicago Bridge and Iron Co
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Filing: 1962-10-15
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Granted: 1965-03-30
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Expires: 1982-10-15
Abstract
No abstract record available.
Inventors
- 👤 Cotovsky Sherwyn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:39
CPC Classifications
B; B23; B23K; B23K20/00; B23K20/12; B23K20/129
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
163 words
A METHOD FOR JOINING A METAL SURFACE SELECTED FROM THE GROUP CONSISTING OF COPPER, BRASS, BRONZE, STEEL, NICKEL AND FERROUS METALS, DIRECTLY TO A GETTER METAL SURFACE OF A LOWER MELTING POING, SAID GETTER METAL SELECTED FROM THE GROUP CONSISTING OF ALUMINUM, TITANIUM AND THEIR ALLOYS, SAID METHOD COMPRISING: CLEANING SAID SURFACES TO REMOVE SURFACE OXIDES AND FOREIGN MATERIALS; ROTATING ONE OF SAID SURFACES RELATIVE TO AND IN DIRECT CONTACT WITH THE OTHER SURFACE TO GENERATE A SUFFICIENT AMOUNT OF FRICTIONAL HEAT TO MELT THE GETTER METAL SURFACE; CONTINUING TO GENERATE FRICTIONAL HEAT BY ROTATIONAL CONTACT TO ALLOW A SUFFICIENT AMOUNT OF LIQUEFIED GETTER METAL TO RUN OUT SO AS TO CARRY AWAY IMPURITIES AND TO RAISE THE TEMPERATURE OF A SUFFICIENT MASS OF METAL TO THE MELTING POINT OF THE GETTER METAL SO THAT THE INTERFACE WILL REMAIN AT THAT TEMPERATURE DURING THE DISCONTINUANCE OF THE ROTATIONAL CONTACT THEREBY CREATING JOINED SURFACES; DISCONTINUING SAID ROTATION; AND ALLOWING THE JOINED SURFACES TO COOL.
Claim 2
Independent Claim
163 words
A METHOD FOR JOINING A METAL SURFACE SELECTED FROM THE GROUP CONSISTING OF COPPER, BRASS, BRONZE, STEEL, NICKEL AND FERROUS METALS, DIRECTLY TO A GETTER METAL SURFACE OF A LOWER MELTING POING, SAID GETTER METAL SELECTED FROM THE GROUP CONSISTING OF ALUMINUM, TITANIUM AND THEIR ALLOYS, SAID METHOD COMPRISING: CLEANING SAID SURFACES TO REMOVE SURFACE OXIDES AND FOREIGN MATERIALS; ROTATING ONE OF SAID SURFACES RELATIVE TO AND IN DIRECT CONTACT WITH THE OTHER SURFACE TO GENERATE A SUFFICIENT AMOUNT OF FRICTIONAL HEAT TO MELT THE GETTER METAL SURFACE; CONTINUING TO GENERATE FRICTIONAL HEAT BY ROTATIONAL CONTACT TO ALLOW A SUFFICIENT AMOUNT OF LIQUEFIED GETTER METAL TO RUN OUT SO AS TO CARRY AWAY IMPURITIES AND TO RAISE THE TEMPERATURE OF A SUFFICIENT MASS OF METAL TO THE MELTING POINT OF THE GETTER METAL SO THAT THE INTERFACE WILL REMAIN AT THAT TEMPERATURE DURING THE DISCONTINUANCE OF THE ROTATIONAL CONTACT THEREBY CREATING JOINED SURFACES; DISCONTINUING SAID ROTATION; AND ALLOWING THE JOINED SURFACES TO COOL.
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) | 1968-03-29 | 1968-09-28 | 1969-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-29 | 1972-09-28 | 1973-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-29 | 1976-09-28 | 1977-03-30 | $7700.00 | Window Closed / Lapsed |