Vacuum valve

Details Vacuum valve Vacuum valve

2006-08-15

2006-08-15

Look, Edward K. (Department: 3751)

Valves and valve actuation

Pivoted valves

Gate

C251S298000, C137S613000

Reexamination Certificate

active

07090192

ABSTRACT:
A vacuum valve comprising a valve body with a valve opening, a valve plate which is movable between an open position in which it lies next to the valve opening and releases the valve opening and a closed position in which the valve opening is covered and a diaphragm plate which is movable between a passive position, in which it lies next to the valve opening and releases the valve opening, and an active position in which it partially covers the valve opening. The vacuum valve has a completely open state in which the valve plate is in its open position and the diaphragm plate is in its passive position, a completely closed state in which the valve plate is in its closed position and is sealed relative to the valve body, and a partially closed state in which the valve plate is in its open position and the diaphragm plate is in its active position, wherein the vacuum valve has a reduced cross section compared to the completely open state.

REFERENCES:
patent: 1609894 (1926-12-01), Trent
patent: 4052036 (1977-10-01), Schertler
patent: 4470576 (1984-09-01), Schertler
patent: 4560141 (1985-12-01), Bosch
patent: 5577707 (1996-11-01), Brida
patent: 6431518 (2002-08-01), Geiser
patent: 2 205 926 (1998-12-01), None

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