Hydromechanical closing device, in particular for lateral...

Details Hydromechanical closing device, in particular for lateral... Hydromechanical closing device, in particular for lateral...

2006-06-13

2006-06-13

Banks, Dennis H. (Department: 3725)

Metal deforming

By use of closed-die and coacting work-forcer

Forcing work into or within closed die; e.g., forging

C072S353600, C072S352000

Reexamination Certificate

active

07059165

ABSTRACT:
The invention relates to a hydromechanical clamping device having two movable die halves and two punches, a first hydraulic piston, and a second hydraulic piston. The second die half is fixed to the frame and the second punch is arranged on the second hydraulic piston. The first hydraulic cylinder is connected to a third hydraulic cylinder. The latter acts on a fourth hydraulic piston. The first hydraulic cylinder is connected to the third hydraulic cylinder, so that the pressure medium displaced from the first hydraulic cylinder during a feed movement flows into the third hydraulic cylinder and the third hydraulic piston moves the fourth hydraulic piston in the feed direction, so that pressure medium is displaced into the second hydraulic cylinder, and the requisite forming pressure can be applied to the second hydraulic piston and the punches move toward one another.

REFERENCES:
patent: 4977773 (1990-12-01), Mito et al.
patent: 5195349 (1993-03-01), Ishinaga et al.
patent: 199 22 659 (1999-05-01), None
patent: 55088945 (1980-07-01), None
patent: 05253696 (1993-10-01), None
International Search Report PCT/CH02/00237—Dated Jul. 10, 2002.
Document Bibliography and Abstract—Hydraulic Closing-Device for the Lateral Extrusion of Workplaces Patent No. EP1053801, A3—Publication Date: Nov. 22, 2000, Corresponding to Patent: DE19922659.

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