US3948077A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Forging press with independent hammer-position adjustment and overload protector
Assignee: MASCHINENFABRIK HASENCLEVER GmbH
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Filing: 1975-03-05
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Granted: 1976-04-06
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Expires: 1995-03-05
Abstract
Abstract The forging press has a horizontal drive shaft on which is carried an eccentric body linked to a vertical force-transmitting block whose lower surface lies at an angle to the horizontal and flushly engages the top of a horizontally reciprocal wedge whose bottom surface lies on the hammer. Interfitting ridges and grooves interconnect the wedge, the force-transmission block, and the hammer so that the hammer hangs from the wedge and the wedge from the force-transmission block. A spindle threaded into the wedge is rotatable to establish its horizontal position, and, therefore, to set the relative position of the force-transmission block in the hammer. At its other end this spindle is provided with a piston reciprocal in a horizontally extending hydraulic chamber which is maintained under a predetermined pressure. The threshold at which the wedge may slip to the side and protect the hammer from overloading is established by the pressure in this hydraulic cylinder.
Inventors
- 👤 Werner Bothe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:05
CPC Classifications
B; B21; B21J; B21J9/00; B21J9/10; B21J9/18; B30; B30B; B30B15/00; B30B15/0029; B30B15/0035; B30B15/28; B30B15/281
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
194 words
A press comprising: a press frame; a pressing table fixed on said frame; a generally horizontal drive shaft on said frame having a rotation axis fixed relative to said frame; a driver on said shaft eccentric to said axle; a slide vertically slidable on said frame and including a force-transmission block having a seat receiving said driver, whereby rotation of said shaft vertically reciprocates said block; a wedge having relatively inclined upper and lower surfaces and displaceable horizontally, said upper surface bearing against said block, and said slide bearing against said lower surface of said wedge, whereby the position of said wedge establishes the relative positions of said block and slide; a cylinder on said slide; a piston in said cylinder having one face turned horizontally toward said wedge and an opposite face turned away from said wedge; a spindle on said piston extending from said one face and having a threaded region threadedly received in said wedge, whereby rotation of said spindle displaces said wedge horizontally in said slide; and means for pressurizing said cylinder to the side of said opposite face for urging said piston toward said wedge with a predetermined force.
Claim 2
Dependent Claim
194 words
A press comprising: a press frame; a pressing table fixed on said frame; a generally horizontal drive shaft on said frame having a rotation axis fixed relative to said frame; a driver on said shaft eccentric to said axle; a slide vertically slidable on said frame and including a force-transmission block having a seat receiving said driver, whereby rotation of said shaft vertically reciprocates said block; a wedge having relatively inclined upper and lower surfaces and displaceable horizontally, said upper surface bearing against said block, and said slide bearing against said lower surface of said wedge, whereby the position of said wedge establishes the relative positions of said block and slide; a cylinder on said slide; a piston in said cylinder having one face turned horizontally toward said wedge and an opposite face turned away from said wedge; a spindle on said piston extending from said one face and having a threaded region threadedly received in said wedge, whereby rotation of said spindle displaces said wedge horizontally in said slide; and means for pressurizing said cylinder to the side of said opposite face for urging said piston toward said wedge with a predetermined force.
Claim 3
Dependent Claim
23 words
The press defined in claim 1 wherein said wedge is provided with a threaded bushing, said spindle being threadadedly engaged in said bushing.
Claim 4
Dependent Claim
22 words
The press defined in claim 1 wherein said piston is provided with an adjustment stem extending from said cylinder outside said slide.
Claim 5
Dependent Claim
104 words
The press defined in claim 1 wherein said wedge and said block are formed with a first set of interfitting and sliding grooves and ridges parallel to said upper surface and said wedge and said slide are formed with a second set of interfitting and sliding grooves and ridges parallel to said lower surface, said means for pressurizing including a fluid reservoir, a pump connected between said reservoir and said cylinder, and a pressure-relief valve connected between said cylinder and said reservoir, said piston being provided at its opposite face with an adjustment stem extending from said slide and rotationally coupled to said spindle.
Claim 6
Dependent Claim
33 words
The press defined in claim 1 wherein one of said surfaces is inclined to a vertical plane passing through said rotation axis and the other of said surfaces is perpendicular to said plane.
Claim 7
Dependent Claim
14 words
The press defined in claim 5 wherein said upper surface is said one surface.
Claim 8
Dependent Claim
77 words
The press defined in claim 1 wherein said wedge, and said block are formed with a first set of interfitting and sliding grooves and ridges extending parallel to said upper surface, said wedge and said slide being formed with a second set of interfitting and sliding grooves and ridges extending parallel to said lower surface, whereby said wedge hangs by said first set from said block and said slide hangs by said second set from said wedge.
Claim 9
Dependent Claim
27 words
The press defined in claim 7 wherein said block is formed with a T-slot parallel to said upper surface and constituting said ridges of said first set.
Claim 10
Dependent Claim
37 words
The press defined in claim 1 wherein said means for pressurizing includes a hydraulic network including a source of hydraulic fluid and a pump for drawing fluid from said source and introducing said fluid into said cylinder.
Claim 11
Dependent Claim
20 words
The press defined in claim 9 wherein said network includes an adjustable pressure-relief valve between said cylinder and said reservoir.
References Cited (Backward Citations)
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-04-06 | 1979-10-06 | 1980-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-06 | 1983-10-06 | 1984-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-06 | 1987-10-06 | 1988-04-06 | $7700.00 | Window Closed / Lapsed |