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US 4,240,778 AGranted
System for providing for parallelism in fluid powered press or the like
AssigneeEfco, Inc.
InventorMyron I. Korytko
Life of this patent
Estimating the term…
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AssigneeEfco, Inc.
InventorMyron I. Korytko
Estimating the term…
A fluid powered compression molding press or the like in which members such as platen members are movable relatively toward one another to develop high pressures therebetween, such as for instance forming a workpiece or work material in a compression die, and including means for compensating for tilting movement of the movable member relative to the other member by creating a force moment acting on the movable member in a direction opposite to the direction of tilting movement. The compensating means includes leveling units adapted for engaging coaction with the movable member and coupled into a closed fluid system including slave units and a control unit operatively connected together, whereby the control unit operates to generate reaction pressure in the respective leveling unit via the respective of said slave units.
In a fluid powered press, a first platen, a second platen, at least one of said platens being movable along a predetermined axis relative to the other platen, one of said platens adapted to support a workpiece thereon, and means for compensating for tilting movement of the movable platen relative to said other platen by creating a force moment acting on said movable platen in a direction opposite to the direction of said tilting movement, said means comprising a plurality of fluid operated leveling units mounted on one of said platens and responsive to tilt of said movable platen, said movable platen being spaced from said leveling units at the start of the platen movement and adapted to engage said leveling units at a selected position of the movable platen, a series of fluid operated slave units, each of said slave units being coupled in fluid transmitting relation to a respective of said leveling units, and a fluid operated control unit operatively coacting with said slave units, for applying force from said slave units to said control unit, upon said engagement of said movable platen with said leveling units, said control unit being operable to generate pressures in said leveling units via said slave units which will oppose tilting of said movable platen.
A fluid system adapted for installation in a mechanism such as a compression press, having a plurality of platens, with one platen being movable along a predetermined axis relative to the other platen, one of said platens being adapted to support a die formed workpiece thereon, said system comprising means for compensating for tilting movement of the movable platen relative to the other platen by creating a force movement on the movable platen in a direction opposite to the direction of the tilting movement of the platen, said means comprising a plurality of fluid operating piston and cylinder leveling units adapted for mounting one of said platens and being adapted to be responsive to tilt of the movable platen upon engagement therewith, a series of fluid operated piston and cylinder slave units, means coupling each of said slave units in fluid transmitting relation to a respective one of said leveling units, and a fluid operated piston and cylinder control unit coacting with said slave units and being adapted to be actuated by fluid pressure force from said slave units, with said control unit being operable to generate pressures in said leveling units via said slave units which will oppose tilting of the associated movable platen.
Dependencies are inferred from the claim text.