US4078415A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of manufacturing shaped bodies by cold shaping
Assignee: Peltzer and Ehlers GmbH and Co
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Filing: 1976-12-23
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Granted: 1978-03-14
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Expires: 1996-12-23
Abstract
Abstract A process for producing shaped bodies which are essentially hollow with particularly configured cavities at each end of the body. The process includes a unique step of simultaneously forming the final configured cavity at one end of the body and reducing the exterior diameter of the same end of the body.
Inventors
- 👤 Friedrich-Karl Koch
- 👤 Christoph Sieber
- 👤 Horst Schmidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:36
CPC Classifications
B; B21; B21K; B21K5/00; B21K5/16; B25; B25B; B25B13/00; B25B13/02; B25B13/06
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
149 words
A method of manufacturing shaped bodies from a stamped part by cold shaping with a series of dies and rams wherein said bodies have a cavity established at each end of the finished hollow body with a different outside diameter at each end, said method comprising the steps of: precupping the first end of said part in one of said series of dies; precupping the second end of said part in a further one of said series of dies; simultaneously forwardly extruding said second end of said part and forming a reduced outside diameter on said second end of said part in another of said series of dies, said second end being completely cupped; and rearwardly extruding said first end of said part in said another of said series of dies, said first end being completely cupped as a result of the operation in the said series of dies.
Claim 2
Independent Claim
149 words
A method of manufacturing shaped bodies from a stamped part by cold shaping with a series of dies and rams wherein said bodies have a cavity established at each end of the finished hollow body with a different outside diameter at each end, said method comprising the steps of: precupping the first end of said part in one of said series of dies; precupping the second end of said part in a further one of said series of dies; simultaneously forwardly extruding said second end of said part and forming a reduced outside diameter on said second end of said part in another of said series of dies, said second end being completely cupped; and rearwardly extruding said first end of said part in said another of said series of dies, said first end being completely cupped as a result of the operation in the said series of dies.
Claim 3
Dependent Claim
35 words
A method according to claim 1 and additionally comprising the step of pushing completely through the material bridge existing between the cupped first end of said body and the cupped second end of said body.
Claim 4
Dependent Claim
49 words
A method according to claim 1, wherein said simultaneous forward extruding and reduced diameter forming step comprises pushing said second end of said stamped part by means of a movable cupping ram through a reducing die onto a fixed cupping ram whose flow edge lies inside the reducing die.
Claim 5
Dependent Claim
21 words
A method according to claim 3, wherein said rearward extruding step comprises pressing said movable cupping ram into the stamped part.
Claim 6
Dependent Claim
24 words
A method according to claim 1, wherein said simultaneous forward extruding and reduced diameter forming step forms one complete end of a socket wrench.
Claim 7
Dependent Claim
20 words
A method according to claim 5, wherein said rearward extruding step forms a second complete end of said socket wrench.
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) | 1981-03-13 | 1981-09-12 | 1982-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-13 | 1985-09-12 | 1986-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-13 | 1989-09-12 | 1990-03-14 | $7700.00 | Window Closed / Lapsed |