Method of exchanging a diaphragm device

Details Method of exchanging a diaphragm device Method of exchanging a diaphragm device

2008-01-22

2008-01-22

Jones, David B (Department: 3725)

Chain, staple, and horseshoe making

Horseshoe making

Blanks and bars

C072S060000, C029S421100

Reexamination Certificate

active

07320211

ABSTRACT:
The invention relates to a press of pressure cell type, which comprises a press chamber in which a diaphragm device is arranged. The diaphragm device includes a diaphragm which together with a press plate forms a pressure cell and is adapted to exert a forming pressure on a workpiece in the press chamber. The edge area of the diaphragm is placed in an annular diaphragm support. The press of pressure cell type also comprises actuating means which are adapted to actively exert a force on the diaphragm support in the direction of the press plate, the diaphragm support pressing the edge area of the diaphragm against the press plate so that an initial seal is provided between the diaphragm at its edge area and the press plate, which seal is built up when supplying pressure medium to the pressure cell by expansion of the diaphragm. The invention also relates to a diaphragm device, a method for applying a pressing power and a method for exchanging a diaphragm in a press of pressure cell type.

REFERENCES:
patent: 3033143 (1962-05-01), Grankowski
patent: 3875778 (1975-04-01), Hellgren
patent: 4676086 (1987-06-01), Hellgren
patent: 4693103 (1987-09-01), Hellgren
patent: 7127925 (2006-10-01), Hellgren
patent: 7155949 (2007-01-01), Hellgren
patent: 368 173 (1973-06-01), None
patent: 404 140 (1978-09-01), None
patent: 446 611 (1986-09-01), None

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