Valves and valve actuation – Biased trip – Electrical trip actuation
Reexamination Certificate
2007-02-27
2007-02-27
Keasel, Eric (Department: 3753)
Valves and valve actuation
Biased trip
Electrical trip actuation
C251S250000, C251S129110
Reexamination Certificate
active
11159685
ABSTRACT:
A position return device for an open and close apparatus 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 a main member with a hollow seat at the top thereof. The first actuating member has a first disk part with a first block member extending from a lateral side thereof to form a first rack. The second actuating member has a second disk part with a second block extending from the right end thereof to form a second rack. The first end cover provides a plurality of first elastic members at the left end thereof. The second end cover provides a plurality of second elastic members at the right end thereof. The output shaft has a pinion joining part to mesh with the first and second racks. The motor shaft of the motor extends upward a rod part and the rod part is attached to an electric magnet, a stationary disk member and a movable disk member.
REFERENCES:
patent: 5325888 (1994-07-01), Stary
patent: 5950427 (1999-09-01), Demerjian et al.
patent: 6173740 (2001-01-01), Marinoni et al.
patent: 6488260 (2002-12-01), Dietz
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