Valves and valve actuation – Biased trip – Electrical trip actuation
Reexamination Certificate
2008-05-27
2008-05-27
Bastianelli, John (Department: 3753)
Valves and valve actuation
Biased trip
Electrical trip actuation
C251S129110, C251S249500, C251S250000
Reexamination Certificate
active
11564028
ABSTRACT:
A position restoring apparatus for an open and close device includes a casing base, a first actuating member, a second actuating member, a first end cover, a second end cover, an output shaft and a motor. The casing base has main member with a hollow seat. The first actuating member has a first disk part with a first block and a first rack at a lateral side of the first block. The second actuating member has a second disk part with a second block and a second rack. The first end cover provides a plurality of first elastic components. The second end cover provides a plurality of second elastic components. The output shaft provides a joining part to mesh with the first and second racks. The motor shaft extends upward a rod part with an electromagnet, a stationary disk member and a movable disk member.
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patent: 6488260 (2002-12-01), Dietz
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