Complex wave spring

A complex wave spring comprising:

• a first wave portion shaped to define at least a first upward undulation and a first downward undulation;
• and
• a second wave portion fixedly arranged relative to the first wave portion, said second wave portion shaped to define at least a second upward undulation proximate to the first downward undulation, and a second downward undulation proximate to the first upward undulation, wherein
• the first wave portion is further shaped to define a first node region between the first upward undulation and the first downward undulation,
• the spring is characterized as having a substantially planar shape defining an axis normal thereto,
• the spring is configured such that when the spring is in contact with surfaces characterized as being substantially normal to the axis and arranged on opposite sides of the spring, and the spring is not substantially compressed by the surfaces, the spring makes contact with the surfaces only at points corresponding to the peaks of the undulations, and
• when the spring is sufficiently compressed between the surfaces, the first node region, the first upward undulation, and the first downward undulation cooperatively deform to establish at least one additional point of contact with at least one of the surfaces.