Electricity: magnetically operated switches – magnets – and electr – Magnets and electromagnets – With magneto-mechanical motive device
Reexamination Certificate
2008-09-05
2011-12-06
Mai, Anh (Department: 2832)
Electricity: magnetically operated switches, magnets, and electr
Magnets and electromagnets
With magneto-mechanical motive device
C335S220000
Reexamination Certificate
active
08072302
ABSTRACT:
Linear actuators (also known as inchworm actuators) including a magnetically actuatable member with a plurality of wings or blades made from a shape memory alloy (SMA) are described. The linear actuators include a bar and an actuator assembly, configured to achieve a linear displacement of the actuator assembly relative to the bar. The actuator assembly includes a housing, a magnetic trigger including an electromagnet and a permanent magnet, and the magnetically actuatable SMA member. Significantly, the wings/blades of the magnetically actuatable SMA member are coupled to the housing. Activation of the magnetic trigger causes the magnetically actuatable SMA member to move toward the magnetic trigger. The motion of the magnetically actuatable SMA can be converted to a linear displacement. The magnetically actuatable SMA can be implemented using a SMA exhibiting both ferromagnetic and SMA properties, or by a ferromagnetic mass coupled with a SMA (i.e., a ferromagnetic SMA composite).
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“Fine
Liang Yuanchang
Taya Minoru
Mai Anh
Rojas Bernard
University of Washington through its Center for Commercializatio
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