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US 4,135,446 AGranted
Press arrangement
AssigneeL. Schuler GmbH
InventorsAlfred Bareis, Reinhard Braun
Life of this patent
Estimating the term…
Abstract
A press arrangement which includes a press table, a punch and an adjusting arrangement for selectively adjusting the distance between the press table and punch. A pressure space is provided in the punch which selectively communicates with a pressure medium supply so as to load and relieve the pressure space. A piston is floatingly disposed in the pressure space and cooperates with an element of the adjusting arrangement so as to create a constantly-acting or permanently-acting tension on the adjusting arrangement when the pressure space is filled with a pressure medium.
Claims8
A press arrangement comprising:
- a press table,
- a punch means,
- adjusting means for selectively adjusting a distance between said punch means and said press table including
- a rotatable threaded nut mounted in said punch means so as to be axially fixed with respect thereto, and
- a non-rotatable threaded bolt means cooperating with said rotatable threaded nut and mounted in said punch means so as to be axially displaceable therein,
- connecting means for connecting a first end of said threaded bolt means with a drive element of the press arrangement, and
- tension creating means arranged in said punch means and cooperating with a second end of said threaded bolt means for selectively creating constantly-acting tension on said adjusting means, said tension creating means including
- a single pressure space means, provided in said punch means, for selectively receiving a supply of a pressure medium during a pressing operation of said punch means, said pressure space means being selectively relievable in order to release said punch means in event of seizure, and said pressure space means being disposed directly in a path of force transmitting power between said connecting means and a lower portion of said punch means to a workpiece.
5 more elements
Dependencies are inferred from the claim text.