Magnetic particle damper apparatus

Details Magnetic particle damper apparatus Magnetic particle damper apparatus

1999-01-20

2000-11-28

Graham, Matthew C.

Brakes

Internal-resistance motion retarder

Magnetic fluid or material

26714014, F16F 904

Patent

active

061522724

ABSTRACT:
A magnetic particle damper apparatus is provided for damping motion between two relatively movable members. The damper apparatus comprises first and second conductor members each attachable to one of the relatively movable members. The conductor members are disposed with confronting surfaces having a gap therebetween filled with a quantity of magnetic particles. A magnetic element is attached to one of the conductor members, producing magnetic flux which is substantially confined to a magnetic flux path defined by relatively magnetically permeable regions and relatively magnetically non-permeable regions of the conductor members to flow across the gap and through the magnetic particles. The magnetic field causes the magnetic particles along the flux path to adhere to one another and to the confronting surfaces of the conductor members producing a force opposing relative motion between said movable members and dissipating energy when the conductor members move relative to one another.

REFERENCES:
patent: 2940749 (1960-06-01), Kehelhor
patent: 2973969 (1961-03-01), Thall
patent: 4679775 (1987-07-01), Funaki

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