Thermal bend actuator comprising bent active beam having...

Details Thermal bend actuator comprising bent active beam having... Thermal bend actuator comprising bent active beam having...

2011-05-24

2011-05-24

Luu, Matthew (Department: 2861)

Incremental printing of symbolic information

Ink jet

Ejector mechanism

C347S061000, C347S062000

Reexamination Certificate

active

07946687

ABSTRACT:
A thermal bend actuator comprising: (a) a pair of electrical contacts positioned at one end of the actuator; (b) an active beam connected to the electrical contacts and extending longitudinally away from the contacts, the active beam defining a bent current flow path between the contacts; and (c) a passive beam fused to the active beam. When a current is passed through the active beam, the active beam heats and expands relative to the passive beam, resulting in bending of the actuator. The active beam comprises a resistive heating bar having a relatively smaller cross-sectional area than any other part of the current flow path. Heating of the active beam is concentrated in the heating bar.

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patent: 2010/0079550 (2010-04-01), McAvoy et al.
Huang, Q., Lee, N.K.S., “Analysis and Design of Polysilicon Thermal Flexure Actuator”, J. Micromech. Microeng. 9 (1999), p. 64-70.

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