Magnetic rotation apparatus

Patent 4751486 Issued on June 14, 1988. Estimated Expiration Date:

April 24, 2007. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

Rotary noiseless detent switch
Patent #: 4628199
Issued on: 12/09/1986
Inventor: Mueller , et al.

Rotary control having variable detents Patent #: 4647889
Issued on: 03/03/1987
Inventor: Addis

Inventor

Minato, Kohei

Application

No. 07/042432 filed on 04/24/1987

US Classes:

335/272, Rotating disk or cylindrical armature310/103, Magnetic field type310/156.01Permanent magnet rotor

Examiners

Primary: Harris, George

Attorney, Agent or Firm

Brown, Martin, Haller & Meador

International Classes

H02K 29/06 (20060101)
H02K 53/00 (20060101)
H02K 29/10 (20060101)

Foreign Application Priority Data

1986-01-24 JP

Abstract

The magnetic rotation apparatus of the present invention has first and second rotors rotatably supported and juxtaposed. The first and second rotors are connected so as to be rotatable in opposite directions in a cooperating manner. A number of permanent magnets are arranged on a circumferential portion of the first rotor at regular intervals, and just as many permanent magnets are arranged on a circumferential portion of the second rotor at regular intervals. Each permanent magnet has one magnetic polarity located radially outward from the rotors, and has the other magnetic polarity located radially inward toward the rotors. The polarity of each permanent magnet, which is located radially outward from the rotors, is identical. When the first and second rotors are rotated in a cooperating manner, the phase of rotation of the permanent magnets of one rotor is slightly advanced from that of the permanent magnets of the other rotor. One of the permanent magnets of one rotor is replaced with the electromagnet. The radially outward polarity of the electromagnet can be changed by reversing the direction in which a current is supplied to the electromagnet.