Electromagnetic actuator for active vibration damping device

Details Electromagnetic actuator for active vibration damping device Electromagnetic actuator for active vibration damping device

2007-03-07

2010-10-12

Nguyen, Xuan Lan (Department: 3657)

Spring devices

Resilient shock or vibration absorber

Including energy absorbing means or feature

C267S140150, C267S140300

Reexamination Certificate

active

07810798

ABSTRACT:
An electromagnetic actuator having: a stator and a movable member disposed in a central hole of a coil member of the stator movable in an axial direction; a coupling rod fixed to the movable member; and an elastic stopper having a ring shaped sealing unit at its outer periphery part, a first stopper unit at its center part, a coupling unit that mutually couples the sealing unit and the first stopper unit, and second stopper units located radially between the sealing unit and the first stopper unit at respective circumferential positions. The sealing unit is compressed between the bottom wall of a housing and a lid member to form a sealing mechanism that fluid-tightly close an opening of an adjustment hole. The first stopper unit axially faces the coupling rod bottom with a first separation distance, and the second stopper units axially face the movable member bottom with a second separation distance greater than the first.

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patent: A 2005-172202 (2005-06-01), None
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U.S. Appl. No. 11/640,843; Hiroyuki Ichikawa et al; filed Dec. 19, 2006.

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