Electricity: magnetically operated switches – magnets – and electr – Magnets and electromagnets – With magneto-mechanical motive device
Reexamination Certificate
2005-03-08
2005-03-08
Donovan, Lincoln (Department: 2832)
Electricity: magnetically operated switches, magnets, and electr
Magnets and electromagnets
With magneto-mechanical motive device
C251S129150
Reexamination Certificate
active
06864771
ABSTRACT:
The electromagnetic valve has an electromagnetic actuator for operating a valve. The electromagnetic actuator has a movable core that reciprocally moves in an axial direction. A stator core has an attracting portion. The attracting portion has a conical portion that is defined by a uniform diameter inner surface and an outwardly inclined outer surface. The outer surface has a smaller diameter at a position closer to an initial position of the plunger. Therefore outer diameter of the conical portion is increased in an attracting direction of the plunger. Moreover, increasing rate of the outer diameter is decreased in the attracting direction. Therefore the outer surface has a greater inclination angle at a position closer to an initial position of the plunger.
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patent: 6453934 (2002-09-01), Bircann et al.
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patent: 6644622 (2003-11-01), Modien
patent: 2000-274546 (2000-10-01), None
Komiyama Tadashi
Koshimizu Michio
Kuroki Katsuhiro
Maeda Kazuto
Sakurai Koji
Denso Corporation
Donovan Lincoln
Nixon & Vanderhye PC
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