Patent US3844157A successfully refreshed from Google Patents.
US3844157A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machine for applying force
Assignee: Langenstein and Schemann GmbH
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Filing: 1972-06-29
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Granted: 1974-10-29
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Expires: 1992-06-29
Abstract
Abstract A press for applying force to a workpiece, having a piston-andcylinder arrangement connected to a wedge which actuates the ram. The piston-and cylinder arrangement includes two pistons selectively displacable for either pressing, or for impacting the workpiece. Weights are arranged on a spindle threadingly received in the wedge for driving the wedge, on the flywheel principle.
Inventors
- 👤 H Bachmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:22
CPC Classifications
B; B21; B21J; B21J11/00; B30; B30B; B30B1/00; B30B1/40
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
134 words
A forming apparatus comprising means for selectively pressing or impacting and including force-transmitting means operatively connected to a reciprocatable ram including plural tool elements for effecting independent forming operations, the forcetransmitting means comprising, in combination, a drive assembly operatively connected to a wedge member, the wedge member being operatively connected to a threaded spindle, said spindle having a longitudinal axis operatively connected to and extending in the direction of converging wedge surfaces of the wedge member, transversely to the direction of reciprocation of the ram, said drive assembly including selectively displacable fluid pressureoperated portions for selectively operating the reciprocatable ram through said wedge member for effecting press forming operations, said portions including a second drive, said sprindle, when rotated by said second drive, being operative to move said wedge member and effect impact-forming operations.
Claim 2
Dependent Claim
134 words
A forming apparatus comprising means for selectively pressing or impacting and including force-transmitting means operatively connected to a reciprocatable ram including plural tool elements for effecting independent forming operations, the forcetransmitting means comprising, in combination, a drive assembly operatively connected to a wedge member, the wedge member being operatively connected to a threaded spindle, said spindle having a longitudinal axis operatively connected to and extending in the direction of converging wedge surfaces of the wedge member, transversely to the direction of reciprocation of the ram, said drive assembly including selectively displacable fluid pressureoperated portions for selectively operating the reciprocatable ram through said wedge member for effecting press forming operations, said portions including a second drive, said sprindle, when rotated by said second drive, being operative to move said wedge member and effect impact-forming operations.
Claim 3
Dependent Claim
60 words
The apparatus as claimed in claim 1 in which said fluid-pressure operated portions comprises hydraulically-operated variable-dimensioned effective piston portions, one piston portion being operatively connected to said wedge for effecting an impacting mode of operation to the ram and another of the piston portions being operatively connected to said wedge for effecting a pressing mode of operation to the ram.
Claim 4
Dependent Claim
25 words
The apparatus as claimed in claim 2 in which one of said piston portions is tubular and the other piston portion is axially aligned therewith.
Claim 5
Dependent Claim
39 words
The apparatus as claimed in claim 1 including a displacable support table operatively mounted beneath said plural tool elelements whereby introduction and removal of workpieces before and after having been formed is expedited during mass production of such work-pieces.
Claim 6
Dependent Claim
20 words
The apparatus as claimed in claim 1 in which said spindle comprises a threaded shaft operatively connected to said wedge.
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) | 1977-10-28 | 1978-04-29 | 1978-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-28 | 1982-04-29 | 1982-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-28 | 1986-04-29 | 1986-10-29 | $7700.00 | Window Closed / Lapsed |