Linear actuator

Details Linear actuator Linear actuator

1998-11-20

2000-03-21

Ramirez, Nestor

Electrical generator or motor structure

Dynamoelectric

Reciprocating

310 12, H02K 4100, H02N 200

Patent

active

060406437

ABSTRACT:
An "inch worm" type linear actuator in which high resolution is achieved by directly moving an actuator armature in small steps using thermal, piezoelectric, electromagnetic, or magnetostrictive armature translators. Sequential operation of paired electromagnet clamp assemblies and the armature translator provides a step-wise linear motion. When power is removed, the inventive mechanism prevents further motion of the armature. The preferred embodiment meets these requirements in a compact size having a relative long stroke that is suitable for cryogenic applications, such as moving a segment of a space telescope mirror.

REFERENCES:
patent: 4456937 (1984-06-01), Iftikar et al.
patent: 4525852 (1985-06-01), Rosenberg
patent: 4664487 (1987-05-01), Tam
patent: 4798989 (1989-01-01), Miyazaki et al.
patent: 5097161 (1992-03-01), Nashiki et al.
patent: 5332942 (1994-07-01), Rennex

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