Patent US3443409A successfully refreshed from Google Patents.
US3443409A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for hydrodynamic forming of bellows-type articles and a device for their realization
Assignee: Individual
•
Filing: 1964-03-06
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Granted: 1969-05-13
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Expires: 1984-03-06
Abstract
No abstract record available.
Inventors
- 👤 Jury Georgievich Matsukin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:48
CPC Classifications
B; B21; B21D; B21D15/00; B21D15/04; B21D15/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
A METHOD OF FORMING BELLOWS-TYPE SHELLS FROM TUBULAR METAL BLANKS, COMPRISING POSITIONING SUCH A BLANK IN A DIE HAVING AN INTERNAL CONFIGURATION OF A SHAPE TO BE IMPARTED TO THE BLANK, DELIMITING A PRESSURE LIQUIDACCOMMODATING CHAMBER HAVING AXIALLY SPACED HORIZONTAL SURFACES AND BOUNDED IN PART BY SAID DIE, FEEDING LIQUID INTO SUCH CHAMBER WHILE PERMITTING ESCAPE OF A PORTION OF SUCH LIQUID FROM THE LOWER END OF SUCH CHAMBER SO THAT SUCH CHAMBER IS IN UNSEALED CONDITION, CONTINUING THE FEEDING OF LIQUID INTO THE CHAMBER AT A RATE SUFFICIENT TO MAINTIAN LIQUID THEREIN OVER AN AXIAL EXTENT AT LEAST COEXTENSIVE WITH THE LENGTH OF AN INITIAL PORTION OF THE BLANK TO BE DEFORMED, AND SUDDENLY APPLYING KINETIC ENERGY TO LIQUID WITHIN THE CHAMBER TO HYDRAULICALLY CLOSE SUCH CHAMBER AND DEFORM SUCH INITIAL PORTION OF THE BLANK.
Claim 2
Independent Claim
136 words
A METHOD OF FORMING BELLOWS-TYPE SHELLS FROM TUBULAR METAL BLANKS, COMPRISING POSITIONING SUCH A BLANK IN A DIE HAVING AN INTERNAL CONFIGURATION OF A SHAPE TO BE IMPARTED TO THE BLANK, DELIMITING A PRESSURE LIQUIDACCOMMODATING CHAMBER HAVING AXIALLY SPACED HORIZONTAL SURFACES AND BOUNDED IN PART BY SAID DIE, FEEDING LIQUID INTO SUCH CHAMBER WHILE PERMITTING ESCAPE OF A PORTION OF SUCH LIQUID FROM THE LOWER END OF SUCH CHAMBER SO THAT SUCH CHAMBER IS IN UNSEALED CONDITION, CONTINUING THE FEEDING OF LIQUID INTO THE CHAMBER AT A RATE SUFFICIENT TO MAINTIAN LIQUID THEREIN OVER AN AXIAL EXTENT AT LEAST COEXTENSIVE WITH THE LENGTH OF AN INITIAL PORTION OF THE BLANK TO BE DEFORMED, AND SUDDENLY APPLYING KINETIC ENERGY TO LIQUID WITHIN THE CHAMBER TO HYDRAULICALLY CLOSE SUCH CHAMBER AND DEFORM SUCH INITIAL PORTION OF THE BLANK.
References Cited (Backward Citations)
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Cited
US1879663A
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US2743691A
Cited
US3141496A
Cited
US2960141A
Cited
US3045339A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-12 | 1972-11-11 | 1973-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-12 | 1976-11-11 | 1977-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-12 | 1980-11-11 | 1981-05-13 | $7700.00 | Window Closed / Lapsed |