Patent US1284946A successfully refreshed from Google Patents.
Patent US4011744A successfully refreshed from Google Patents.
US4011744A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and means for shaping parts by hydraulic extrusion
Assignee: Individual
•
Filing: 1975-02-25
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Granted: 1977-03-15
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Expires: 1995-02-25
Abstract
Abstract The proposed method for shaping parts by hydraulic extrusion allows of deforming the blank by different pressures exerted upon different blank zones. This principle is embodied in a device which comprises a vessel housing a plurality of auxiliary vessels whereof the edges are pressed against the blank, defining closed cavities therewith. Liquid under pressure is supplied into each of these cavities. Thanks to such an arrangement, the parts manufactured have a negligible wall thickness error. The design of the proposed device permits manufacturing double-curvature parts.
Inventors
- 👤 Ivanovich Ershov Vladislav
- 👤 Nikolai Dmitrievich Livenko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:23
CPC Classifications
B; B21; B21D; B21D26/00; B21D26/02; B21D26/021; B21D26/027; B21D26/031
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A method for shaping parts by hydraulic extrusion, comprising the steps of: profiling a sheet metal workpiece by liquid simultaneously supplied to different zones of said workpiece at different pressure values corresponding to the shape of said workpiece, said workpiece having a central part and a flange section, said liquid comprising a variable-pressure deforming agent, the variable liquid pressure increasing the wall thickness in the central part of said workpiece and decreasing the wall thickness in the flange section of the workpiece the elasticity of the workpiece remaining substantially unchanged by said liquid.
Claim 2
Independent Claim
93 words
A method for shaping parts by hydraulic extrusion, comprising the steps of: profiling a sheet metal workpiece by liquid simultaneously supplied to different zones of said workpiece at different pressure values corresponding to the shape of said workpiece, said workpiece having a central part and a flange section, said liquid comprising a variable-pressure deforming agent, the variable liquid pressure increasing the wall thickness in the central part of said workpiece and decreasing the wall thickness in the flange section of the workpiece the elasticity of the workpiece remaining substantially unchanged by said liquid.
References Cited (Backward Citations)
US2284773A
Cited
US2728317A
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US2960141A
Cited
US3420089A
Cited
US3566650A
Cited
US3715902A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-03-14 | 1980-09-13 | 1981-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-14 | 1984-09-13 | 1985-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-14 | 1988-09-13 | 1989-03-15 | $7700.00 | Window Closed / Lapsed |