Electricity: magnetically operated switches – magnets – and electr – Magnets and electromagnets – With magneto-mechanical motive device
Patent
1983-04-22
1985-01-01
Harris, George
Electricity: magnetically operated switches, magnets, and electr
Magnets and electromagnets
With magneto-mechanical motive device
335272, H01F 708
Patent
active
044918151
ABSTRACT:
A rotary actuator for driving a fluid control valve comprises a yoke which forms a closed magnetic path an excitation coil which produces a magnetic flux in the yoke, a permanent magnet which is rotatably arranged in a through hole or in a slit formed in the yoke, and a restoring spring which produces a force acting against a rotational torque generated in the magnet by a main magnetic flux which flows through the yoke and the permanent magnet when the excitation coils is energized. Shielding portions are formed on both sides of the ends of the yoke, which ends oppose the permanent magnet, so as to substantially shield the permanent magnet together with the ends of the yoke, whereby a magnetic reluctance of a path of the magnetic flux remains substantially constant irrespective of the rotating position of the permanent magnet with respect to the yoke when the excitation coil is de-energized.
REFERENCES:
patent: 3434082 (1969-03-01), Montagu
patent: 3694782 (1972-09-01), Ray
Hattori Kyo
Idogaki Takaharu
Kawai Hisasi
Sakurai Kazuhiro
Harris George
Nippon Soken Inc.
Toyota Jidosha & Kabushiki Kaisha
LandOfFree
Rotary actuator does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Rotary actuator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Rotary actuator will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-579276