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US 5,866,967 AGranted
Slip ring mechanism of non-sliding type
AssigneeKabushiki Kaisha Toshiba
InventorAkira Sasaki
Life of this patent
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Abstract
Magnetic fluid is inserted between slip rings of a rotor and brushes of a stator. The magnetic fluid is held by magnetic force generated by permanent magnets and yokes mounted on the stator, so as to be sidable relative to the slip rings. In this state, in accordance with rotation of the rotor, the brushes and the slip rings are rotated without direct contact with each other via the magnetic fluid. Thus, the brushes and the slip rings are electrically connected to each other.
Claims48
A slip ring mechanism comprising:
- a stator having brushes;
- a rotor having slip rings opposed to the brushes of the stator with a gap;
- magnetic fluid, inserted between the brushes of the stator and the slip rings of the rotor, for electrically connecting the brushes and the slip rings;
- and
- fluid holding means for slidably holding and positioning the magnetic fluid between the brushes of the stator and the slip rings of the rotor by means of magnetic force.
2 more elements
A slip ring mechanism comprising:
- a stator having brushes;
- a rotor having slip rings opposed to the brushes of the stator with a gap;
- bearing coupling means having a plurality of balls rotatable between the brushes of the stator and the slip rings of the rotor, the plurality of balls being rotated and slid between the brushes and the slip rings in accordance with rotation of the rotor;
- magnetic fluid, inserted between the brushes of the stator and the slip rings of the rotor to cover the bearing coupling means, for electrically connecting the brushes and the slip rings;
- and
- fluid holding means for slidably holding and positioning the magnetic fluid between the brushes of the stator and the slip rings of the rotor by means of magnetic force.
3 more elements
Dependencies are inferred from the claim text.