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Patent Searching and Data


Title:
VARIABLE SPRING-CONSTANT LINEAR ACTUATOR
Document Type and Number:
Japanese Patent JPH0715937
Kind Code:
A
Abstract:

PURPOSE: To provide a linear actuator for controlling the pressure in a pressure control apparatus connected to the output shaft through electrically adjustable thrust.

CONSTITUTION: An output axle 8 can be moved freely with respect to center yokes 5L and 5R in a stator 6, while a movable member 9 is provided at the center of the output axle 8. Permanent magnets that are repulsively magnetized in an axial direction are symmetrically put at both side of the movable member 9 and the side of the center yokes 5L and 5R. Moreover, coils 12L and 12R for controlling the repulsive force through an exciting current (I) are provided, and characteristics in dislocation and thrust are adjustable by changing the exciting current (I).


Inventors:
NAITO KINSHIRO
Application Number:
JP23661392A
Publication Date:
January 17, 1995
Filing Date:
September 04, 1992
Export Citation:
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Assignee:
NAITO KINSHIRO
International Classes:
F16K31/02; H02K33/00; H02K33/16; (IPC1-7): H02K33/00; F16K31/02; H02K33/16
Attorney, Agent or Firm:
Hidekazu Miyoshi (1 outside)